This document summarizes information about sustainable fire ant management techniques. It discusses the release of fire ant-decapitating phorid flies in several southern states to control fire ant populations. It also discusses experimental releases of a protozoan disease to infect and kill fire ant queens. A number of least-toxic fire ant baits and other control methods such as hot water and traps are also mentioned.
Abstract— There are numerous threats that affect bee populations worldwide such as exposure to pesticides; genetic diversity, poor nutrition and the impact of pathogens. Between them, Ascosphaera apis is the etiological agent of chalkbrood disease that affects honeybees brood. To understand the biology of this pathogen, we revised the phylogeny, morphology, and sexual reproduction. The pathogenesis, closely related to the factors that affect the virulence the A. apis and their interactions with the host, are determinant at moment of developing chalkbood. The honeybee develops several strategies to defend themselves from these pathogens. First, the individual immunity mechanisms such us perithrophic membrane, the microbiota of midgut larvae and the humoral and cellular immunity are the first defense barriers against A. apis. Later, other mechanisms would appear, related to the social immunity, such as their social organization, the polyandry, the hygienic behavior and the social fever, that change the environmental conditions in the bee colony reducing A. apis viability. However, other pathogens such as Nosema spp, Varroa destructor, several viruses, and the presence of pesticides affect the sanitary status of the honeybee allowing the fungus to develop easily. Finally, we describe to our knowledge, the best three natural alternatives that could be studied in order to employ them in field trails.
Importance of study of immature stages of insects in agricultureSanju Thorat
The type of life cycle will vary with the insect-pest. However, most pests have certain weak points during their life cycle when they are the most vulnerable to manage. Some insect are predators, either as larvae or in both larval and adult stages. The decomposition of organic waste, such as dung and manures are an important ecosystem process which is largely provided by insects. Insect as food for animals and human being. The knowledge regarding immature stages of insect-pests and understand site of oviposition, site of pupation and larval behaviour can allow for timely and effective management, thus we can reduction in the qualitative and quantitative losses of yield and increase the profit.
Biological Control to Maintain Natural Densities of Insects and Mites by Fiel...Premier Publishers
In the present study, the biological control of insects and mites to maintain their natural densities by field releases of lady beetles (Coleoptera: Coccinellidae) is analyzed. Female lady beetles may lay from 20 to more than 1000 eggs over a one to three month period, near prey such as aphids in protected sites on leaves and stems. Lady beetles have hefty appetites and one tiny alligator like larva can eat over two dozen aphids a day, and single adult can eat over twice of that much. In other words, one larva will eat about 400 medium-size aphids during its development to pupal stage and an adult lady beetle may eat over 5,000 aphids during its lifetime (about a year). Usually, reddish-orange lady beetles eat aphids, and darker ones more often eat spider mites, whiteflies and scale insects. The best time to release lady beetles into garden is late in afternoon or at sundown, which can encourage them to stay for night and find suitable food and protection. Dampen the ground or plants before releasing of lady beetles, can encourage them to stay and drink water. About 1000 lady beetles can rid an acre of ground from most of soft-bodied pests and release beetles at base of plants at 20 feet apart or more so that they can hunt for food. Ability of collected lady beetles to reproduce is suspended (reproductive diapause), so eggs are not produced for several weeks after release. Pre-fed lady beetles prior to release can allow some eggs maturation, but few researchers or companies also provide such pre-conditioned lady beetles. The trends of prey devouring demonstrate profound effects that lady beetle may have on target and non-target pests, and highlight their importance for initiating of biological control programs.
The Senegalese grasshopper Oedaleus senegalensis (Krauss, 1877) is a serious agricultural pest in Senegal. The use of chemical pesticides on a large scale has raised concerns because of side effects on health and the environment. As an alternative to chemical control, a fungal strain of Metarhizium anisopliae (Metschnikoff, Sorokin) was isolated from the Senegalese grasshopper, and grown in agar culture medium. The effect on O. senegalensis was studied with an oil fungus formulation of 340 × 105 conidia/ml. Spraying took place in the field, and both nymphs and adults were infected with the fungus oil formulation. A total of 1.5 liter oil formulation of fungus was used for 1500 m2. Two methods were used to assess effectiveness: 1) we captured infected insects and fed them fresh grass daily in the laboratory and recorded time to death; 2) we counted insects in the field before and after application. In the field, the number of insects decreased significantly after the fungus treatment. In the laboratory, the lethal time at which 50% of the insects died varied between 8 to 9 days. The effectiveness of M. anisopliae in natural environment decreased with time.
Abstract— There are numerous threats that affect bee populations worldwide such as exposure to pesticides; genetic diversity, poor nutrition and the impact of pathogens. Between them, Ascosphaera apis is the etiological agent of chalkbrood disease that affects honeybees brood. To understand the biology of this pathogen, we revised the phylogeny, morphology, and sexual reproduction. The pathogenesis, closely related to the factors that affect the virulence the A. apis and their interactions with the host, are determinant at moment of developing chalkbood. The honeybee develops several strategies to defend themselves from these pathogens. First, the individual immunity mechanisms such us perithrophic membrane, the microbiota of midgut larvae and the humoral and cellular immunity are the first defense barriers against A. apis. Later, other mechanisms would appear, related to the social immunity, such as their social organization, the polyandry, the hygienic behavior and the social fever, that change the environmental conditions in the bee colony reducing A. apis viability. However, other pathogens such as Nosema spp, Varroa destructor, several viruses, and the presence of pesticides affect the sanitary status of the honeybee allowing the fungus to develop easily. Finally, we describe to our knowledge, the best three natural alternatives that could be studied in order to employ them in field trails.
Importance of study of immature stages of insects in agricultureSanju Thorat
The type of life cycle will vary with the insect-pest. However, most pests have certain weak points during their life cycle when they are the most vulnerable to manage. Some insect are predators, either as larvae or in both larval and adult stages. The decomposition of organic waste, such as dung and manures are an important ecosystem process which is largely provided by insects. Insect as food for animals and human being. The knowledge regarding immature stages of insect-pests and understand site of oviposition, site of pupation and larval behaviour can allow for timely and effective management, thus we can reduction in the qualitative and quantitative losses of yield and increase the profit.
Biological Control to Maintain Natural Densities of Insects and Mites by Fiel...Premier Publishers
In the present study, the biological control of insects and mites to maintain their natural densities by field releases of lady beetles (Coleoptera: Coccinellidae) is analyzed. Female lady beetles may lay from 20 to more than 1000 eggs over a one to three month period, near prey such as aphids in protected sites on leaves and stems. Lady beetles have hefty appetites and one tiny alligator like larva can eat over two dozen aphids a day, and single adult can eat over twice of that much. In other words, one larva will eat about 400 medium-size aphids during its development to pupal stage and an adult lady beetle may eat over 5,000 aphids during its lifetime (about a year). Usually, reddish-orange lady beetles eat aphids, and darker ones more often eat spider mites, whiteflies and scale insects. The best time to release lady beetles into garden is late in afternoon or at sundown, which can encourage them to stay for night and find suitable food and protection. Dampen the ground or plants before releasing of lady beetles, can encourage them to stay and drink water. About 1000 lady beetles can rid an acre of ground from most of soft-bodied pests and release beetles at base of plants at 20 feet apart or more so that they can hunt for food. Ability of collected lady beetles to reproduce is suspended (reproductive diapause), so eggs are not produced for several weeks after release. Pre-fed lady beetles prior to release can allow some eggs maturation, but few researchers or companies also provide such pre-conditioned lady beetles. The trends of prey devouring demonstrate profound effects that lady beetle may have on target and non-target pests, and highlight their importance for initiating of biological control programs.
The Senegalese grasshopper Oedaleus senegalensis (Krauss, 1877) is a serious agricultural pest in Senegal. The use of chemical pesticides on a large scale has raised concerns because of side effects on health and the environment. As an alternative to chemical control, a fungal strain of Metarhizium anisopliae (Metschnikoff, Sorokin) was isolated from the Senegalese grasshopper, and grown in agar culture medium. The effect on O. senegalensis was studied with an oil fungus formulation of 340 × 105 conidia/ml. Spraying took place in the field, and both nymphs and adults were infected with the fungus oil formulation. A total of 1.5 liter oil formulation of fungus was used for 1500 m2. Two methods were used to assess effectiveness: 1) we captured infected insects and fed them fresh grass daily in the laboratory and recorded time to death; 2) we counted insects in the field before and after application. In the field, the number of insects decreased significantly after the fungus treatment. In the laboratory, the lethal time at which 50% of the insects died varied between 8 to 9 days. The effectiveness of M. anisopliae in natural environment decreased with time.
Termites are social insects and live in colonies which are usually located in ground or in wood. Most termites feed on cellulose from wood and wood by-products such as paper; some tropical species feed on fungi, lichens etc.
Termites are usually divided into 3 groups based on the location of there colony; the Subterranean , the Drywood and the Dampwood termites. The biology and habitat of each group are different, so a detailed knowledge of each is necessary for effective control.
Parasitoids and Predators, their attributes.Bhumika Kapoor
Insect parasitoids have an immature life stage that develops on or within a single insect host, ultimately killing the host, hence the value of parasitoids as natural enemies. Adult parasitoids are free-living and may be predaceous. Parasitoids are often called parasites, but the term parasitoid is more technically correct. Most beneficial insect parasitoids are wasps or flies, although some rove beetles (see Predators) and other insects may have life stages that are parasitoids.
where as the Major characteristics of arthropod predators includes adults and immatures are often generalists rather than specialists, they generally are larger than their prey, they kill or consume many prey males, females, immatures, and adults may be predatory and they attack immature and adult prey.
AppsDesignDesk designs and develops mobile applications for smartphones and tablets running iOS and android operating systems, such as IPhones, IPads & Tablets. We specialize in apps for small and medium size businesses (SME).
Termites are social insects and live in colonies which are usually located in ground or in wood. Most termites feed on cellulose from wood and wood by-products such as paper; some tropical species feed on fungi, lichens etc.
Termites are usually divided into 3 groups based on the location of there colony; the Subterranean , the Drywood and the Dampwood termites. The biology and habitat of each group are different, so a detailed knowledge of each is necessary for effective control.
Parasitoids and Predators, their attributes.Bhumika Kapoor
Insect parasitoids have an immature life stage that develops on or within a single insect host, ultimately killing the host, hence the value of parasitoids as natural enemies. Adult parasitoids are free-living and may be predaceous. Parasitoids are often called parasites, but the term parasitoid is more technically correct. Most beneficial insect parasitoids are wasps or flies, although some rove beetles (see Predators) and other insects may have life stages that are parasitoids.
where as the Major characteristics of arthropod predators includes adults and immatures are often generalists rather than specialists, they generally are larger than their prey, they kill or consume many prey males, females, immatures, and adults may be predatory and they attack immature and adult prey.
AppsDesignDesk designs and develops mobile applications for smartphones and tablets running iOS and android operating systems, such as IPhones, IPads & Tablets. We specialize in apps for small and medium size businesses (SME).
Insects are a class of invertebrates within the arthropod phylum that have a chitinous exoskeleton, a three-part body, three pairs of jointed legs, compound eyes and one pair of antennae.
http://bit.ly/1tvBxTu
African Giant Pouched Rats, Cricetomys gambianus, are native to sub-Sahara Africa but a small population in Florida is potentially an invasive species.
I briefly introduce the problems invasive species like this one can cause in the United States.
Non-Native Specie House Mouse3a). The house mouse is a native r.docxhenrymartin15260
Non-Native Specie: House Mouse
3a). The house mouse is a native rodent from Eurasia. They were introduced worldwide through the human association. The first country that introduced the house mouse to the United States was Western Europe. In Southern California we don't have a high population of house mouse but the small amount that we do came from Asia.
3B). This specie does have a colonized habitat. They like to colonize in homes, stores granaries, barns, and feed houses. They like to colonize in humans homes because they eat any type of human food but they are mainly on the look out for cereals and grains. when they have to set up a nest they go out to the wild specially on greenery areas and fields. The House mouse don't have loss of natives since they aren't aggressive species since they habitat in large territories. The male house mousse get aggressive male to male because they like to protect their territories. when female mouse are expecting they get aggressive with female mousses when they are out looking for food.
3C). yes house mouse to have resources because they are on the look out for food so that means their resources are homes mainly because they will always find food. since they are nocturnal specie they can inhibit in close places.
3D). there isn't much of a bad impact for the native species since they mainly inhibit in hidden territories. They like to nest out in the wild but they have their own way of going in and out of their territory to prevent from being invaded by others.
http://www.britannica.com/EBchecked/topic/273137/house-mouse (Links to an external site.)
http://www.columbia.edu/itc/cerc/danoff-burg/invasion_bio/inv_spp_summ/Mus_musculus.html (Links to an external site.)
http://en.wikipedia.org/wiki/House_mouse (Links to an external site.)
Running Head: COTTONTAIL RABBIT
COTTONTAIL RABBIT 2
Cottontail Rabbit
Chenao Jiang
09/13/2014
Native species refers to animal or plant species thriving in the ecology they evolved from, where exotic species refers to plant or animal species living outside their ecological zone, which existence in the present ecology is as a result of human activity. Ecology on the other hand refers to interactions between the living organisms and their environment. This means that, there is usually a change in interaction when a new species is introduced in a new ecological system. The change in interaction affects both the introduced species and the indigenous species. The term exotic species culminates from European exploration, colonization and settlement outside their continent. They carried with them plants and animals originally thriving in their original homeland to their new settlement areas.
This paper focuses on animal species that can be found from Canada to South America and, in the United States, from the East Coast to the Great Plains and New England. Cottontail r.
Pest of poultry and their future precautionsPARUNKUMAR6
Pests of poultry affects production of egg and meat which may be insect or non insects like Lice, Flies, Flea, Bugs and mite. Management activities should be taken like physical, chemical or biological control for effective control of poultry pests.
Philip H. Brown is an economist in Arlington, Virginia. As an economist, Philip H. Brown is interested and knowledgeable in various areas of climate change and biosecurity. He is particularly interested in the negative impact of invasive species on the environment and the related economic fallout, especially in relation to honeybees.
A native of sub-Saharan Africa, the small hive beetle is a pest to the Western honeybee. The beetle has also been proven to be a particularly harmful invasive species outside of its native habitat, causing severe damage to honeybee colonies throughout Europe. Over the years, the beetle has become a focus of both biologists and economists due to its ability to rapidly spread and negatively impact colony health and honey production.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
1. ATTRA is the national sustainable agriculture information service operated by the National Center for
AppropriateTechnology,throughagrantfromtheRuralBusiness-CooperativeService,U.S.Department
of Agriculture. These organizations do not recommend or endorse products, companies, or individuals.
NCAT has offices in Fayetteville, Arkansas (P.O. Box 3657, Fayetteville, AR 72702), Butte, Montana,
and Davis, California.
By Preston Sullivan
NCAT Agriculture Specialist
November 2003
SUSTUSTUSTUSTUSTAINABLEAINABLEAINABLEAINABLEAINABLE FIREIREIREIREIRE ANTNTNTNTNT MANAGEMENTANAGEMENTANAGEMENTANAGEMENTANAGEMENT
Abstract: Efforts are underway to introduce natural enemies of the red imported fire ant to lessen its competitiveness against
native ants. Releases of fire-ant-decapitating phorid flies have been made in several southern states. Mass rearing and
additional releases of these flies are underway now. Experimental releases of a disease-causing protozoan have been made in
ten southern states. A number of least-toxic fire ant control materials are discussed. Sources for some materials are provided
in theResources section. Physical controls such as hot water, steam, and ant traps are discussed.
Fire Ant Ecology and Biological Controls
The red imported fire ant, Solenopsis invicta, arrived in the U.S. from central Brazil between 1933
and 1945 by hitchhiking on ship cargo. Though S. invicta has become quite a pest, not all fire ant
species have achieved pest status. The black imported fire ant, Solenopsis richteri, arrived before the
red imported fire ant, sometime around 1918. S. invicta has out-competed its black cousins and also
crossed with them, creating hybrids between the two species (1). The Texas red ant, S. geminata, a
native American fire ant found in much of Texas, is not considered a pest.
The red imported fire ant prospers in open sunny areas such as cropland, pastures, and urban
lawns. It is an insect of disturbed, low-diversity habitats. In its native South America, the ant
evolved in frequently disturbed floodplain areas. Undisturbed areas, such as swamplands and
dense forests, have very low densities of fire ant nests (2). The ants have an aversion to deep shade.
Their mounds, which they build in almost any type of soil, can reach 18 inches high and be 2 feet
wide, with tunnels extending 5 to 6 feet underground. The mounds are often located in rotting logs
and around stumps and trees. Ant colonies can also be found in or under buildings. Two types of
mounds exist: single -queen colonies where there are t ypically 30 to 100 colonie s per acre, and
multiple-queen colonies where the density of mounds per acre may average between 200 and 700,
with each mature colony having 200,000 ants. Ants from the single-queen mounds form territories
around the mound, which they protect from other fire ants. The multi-queen colonies are not
territorial.
Fire ants spread in two ways, according to the type of colony. From the single-queen colonies,
winged virgin queens emerge, fly high above the colony, and mate with winged males between
spring and early fall. The queens land to establish new colonies alone. Such airborne spread
should lead to a patchy distribution of new fire ant colonies interspersed with colonies of native ant
species. Multiple-queen colonies spread when a new queen leaves the parent mound with a group
of workers to form a new colony nearby (3, 4). This strategy has been more successful where native
ant populations have prevented colonization by single-queen colony virgin females trying to start a
CURRENT TOPIC
2. //SUSTAINABLE FIRE ANT MANAGEMENTPAGE 2
colony alone. In a Texas study, imported fire ant spread was observed as a continuous moving
carpet of fire ants spreading slowly across the landscape. Once an a rea had been invad ed, there
were seven imported fire ant mounds for every native fire ant mound formerly present. After
invasion, all native ant species declined, and overall arthropod diversity was reduced by more than
40% (5). Interestingly, in this study area the last place to be colonized was a patch of little bluestem
grassland that has been undisturbed since the 1920s. These observations support the idea that
native ants have better resistance to invasion in undisturbed native grassland. Once established in
a new area, the imported fire ant typically decreases the diversity of native insect communities and
wildlife and out-competes native ant species, driving some to extinction.
The red imported fire ant consumes a wide variety of foods including many types of insects, car-
rion, seeds, and seedlings. They are considered a beneficial species in some crops like sugar cane,
cotton, and pecans, where they prey on boll weevils and boring insects (6). In urban areas they feed
on roach eggs, flea larvae, ticks, chinch bugs, and other pests. On the other hand, the imported fire
ant stings painfully and causes problems with mowing, tilling, harvesting, and electrical equip-
ment.
The red imported fire ant has flou rished in the U.S. in the absence of co-evolved predators, patho-
gens, and parasites. The absence of these natural enemies has allowed it to dominate food sources
despite the fact that it is largely ide ntical to native fire ant species. Further, the aggressive use of
insecticides against the imported fire ant has only served to wipe out competing and predatory
native ant species and increase the competitive dominance of the imported species by killing off its
competition.
In their native Brazil, red fire ants exist in much lower numbers than in the southern U.S. ( Figure
1). Even in desirable habitat such as Brazilian roadsides, the fire ant density is 10% of that seen in
the U.S. It is not uncommon to walk 100 to 200 yards from one mound to the next one. Our native
U.S. fire ant was present in similar densities in Texas before the arrival of the imported fire ant.
The reason for the staggering difference in fire ant abundance in Brazil and the U.S. is the presence
of natural enemies. In its native Brazil, the red fire ant is attacked by several species of flies in the
Phoridae family. When a fire ant mound is disturbed, the workers rush out to defend the mound.
But they quickly run back underground to avoid attack by these flies. Our native U.S. fire ants are
also attacked by phorid flies that specifically parasitize the native fire ants but not the imported
fire ant.
The same behavior has been observed in native U.S. fire ants with native phorid flies. F ire ants
recognize these flies as harmful and will seek cover when they are present. So, in addition to
killing fire ants outright, the flies hamper their feeding behavior. This change in feeding and
foraging behavior allows other ant species to compete effectively with fire ants. In other words,
the appropriate phorid fly species levels the playing field by removing the fire ants’ competitive
edge.
3. //SUSTAINABLE FIRE ANT MANAGEMENT PAGE 3
Figure 1. Fire ant mound density in Brazil compared to the U.S. and Texas(3).
The small phorid flies are about 1/16 inch long and spend their time hovering above disturbed
mounds or along foraging trails looking for fire ants. When a fly locates a fire ant, it s woops down
and lays an egg on the ant. The egg will hatch into a tiny maggot that bores into the fire ant’ s
head. The fly maggot grows i nside the ant’s head by eating the brain and other head contents .
Once the ant dies the fly maggot pupates inside the head that has by now fallen off. Eventually, an
adult fly emerges from the ant head and flies off to lay eggs on other fire ants.
Figure 4. A young phorid fly emerges from
the ant’s head after pupating.
Figure 3. The phorid fly larva lives in the
decapitated fire ant’s head.
Figure 2. Phorid fly.
Photos courtesy of
USDA Gainesville, FL
4. //SUSTAINABLE FIRE ANT MANAGEMENTPAGE 4
Scientists have identified two species of decapitating phorid flies that are host-specific to red im-
ported fire ants. Mass rearing of phorid flies at several USDA facilities has been underway since
the spring of 2001, and releases have been made in 12 southern states. A fter talking with USDA
scientists in Florida and Mississippi, I realized that th e phorid fly-release programs are still in the
early stages. Although scientists are selecting demonstration sites on both private farms and re-
search stations, no flies are available for purchase or for general release on farms by ind ividuals.
The phorid flies will not provide complete control of fire ants but rather contribute to keeping both
their numbers and their foraging activity down. For more information on phorid flies, see the Web
sites listed under the Resources section.
The USDA Agricultural Research Service has sponsored an area-wide suppression of fire ants in
pasture projects in five southern states. Cooperating states are Florida, Mississippi, Oklahoma,
South Carolina, and Texas. The project’s goal is to demonstrate practical, long-term control of fire
ants over a large area using a combination of baits and biological controls. Two 300-acre sites of
improved pasture in each state have been selected for the demonstration treatment. Fire ant popu-
lations are reduced through a combination of aerially applied baits plus biological controls of
phorid flies and Thelohania solenopsae, a disease-causing protozoan released around the perimeter
of the treated area. The researchers expect this program to provide sustainable control, thus re-
ducing the need for repeated bait or pesticide applications. Read more about the project at the
USDA-ARS Web site: http://www.ars.usda.gov/fireant/.
Releases of Thelohania solenopsae , a disease-causing protozoan that attacks the imported fire ant,
have been made in 10 southern states (8). This disease apparently came to the U.S. with the fire
ant, and releases are being made without quarantines. ARS scientist David Williams, who is work-
ing with colleagues to mass-produce the pathogen, says the disease is slow but very efficient (9). It
infects the queen, and soon she starts losing weight. S ubsequently, she produces fewer eggs and
the colony slowly declines. The diseased queen produces diseased young queens that fly off in-
fected with the disease. An infected colony dies out in a year to 16 months (10). Once USDA
scientists work out an effective mass-production method, more releases of Thelohania disease will be
made. Currently there are no commercial products containing Thelohania available.
Certain species of beneficial nematodes attack the imported fire ant. Treatment is expensive, and
the effectiveness of parasitic nematodes can vary. Sources of nematodes are limited, but include
Gulf Coast BioTech Controls (see Resources section). Their ANTidote® product contains three
species of nematodes that parasitize and kill fire ants. These three types of nematodes enter the
various castes of ants (males, workers, and queen). ANTidote works more slowly in black g umbo
soils than in sandy loam soils, simply because the nematodes are better adapted to sandy soils than
to heavy clays. The product is mixed with water and applied as a drench to the mound.
Other biocontrol agents are: workerless parasite ant ( Solenopsis daguerri and S. ricteri), armadillos,
beetles, millipedes, silverfish. This Web page has references to these controls:
http://uts.cc.utexas.edu/~gilbert/research/fireants/faenviron/predators.html
which will lead you to:
http://uts.cc.utexas.edu/~gilbert/research/fireants/faenviron/index.html
which will lead you to the references.
Another Web page with alternative controls:
http://www.thebestcontrol.com/pests/fireants/ipm2.htm
5. //SUSTAINABLE FIRE ANT MANAGEMENT PAGE 5
Least-toxic Pesticides
A wide variety of insecticides are labeled for fire ants. Since many field studies have been done in
the states with fire ant populations, it is advisable for readers to contact their local Extension agents
and other sources for those studies before investing in fire ant treatments. Money and time can be
saved with appropriate local information evaluating efficacy of available materials for fire ant con-
trol. Information on the least toxic and most environmentally appropriate options is presented
below.
Disclaimer: Pest control products are changing all the time. One year a product may be widely
available and the next year off the market for various reasons. ATTRA assumes no responsibility
for the efficacy of any of these products, nor for their availability. As with any product, read and
follow label directions and safety precautions with all fire ant controls. Sources for some of these
products are found at the end of this publication. There may be other appropriate products that
have been omitted here. ATTRA makes no claim that this coverage of fire ant control products is
comprehensive.
Baits
Baits containing a toxicant (frequently dissolved in soybean oil) are considered effecti ve methods of
controlling fire ants (13). Corn cob grits are typically used to absorb the toxicant and oil. The baited
grits are then applied by hand with a broadcast seeder to a large area around individual mounds.
Stringent requirements for these baits dictate that they have delayed toxicity, are effective over a
10-fold dose range, degrade quickly, and are otherwise environmentally acceptable (13). Baits can
poison non-target ants if care is not taken to put the bait around fire ant mounds only. Baits are
applied during spring and fall when fire ants are actively feeding, and not during the hottest part of
summer. A void applying just after a rain or when the ground is wet with dew, as water decom-
poses the bait.
The following section on fire ant baits is based on a University of Georgia Cooperative Extension
Service publication entitled Managing Imported Fire Ants in Urban Areas: A regional publication devel-
oped for the southern states . (Bulletin 1191, September, 2000). It is available on the Web at: < http:/
/www.ces.uga.edu/pubcd/B1191.htm#Table1>. Baits are listed by generi c names of active ingre-
dients, followed by some examples of product names, how they are used, and their modes of action.
Hydramethylnon and sulfluramid (Amdro®, Siege®, Combat®, MaxForce®, Raid® Ant Baits Plus)
are ingredients that kill ants by preventing them from converting food into energy. These baits
eliminate fire ant colonies within a week when applied to individual mounds, but take several
weeks when broadcast. They are also formulated in bait granules and bait stations. Some of these
baits cannot be used on cropland producing food or feed (check the labels).
Avermectin, also known as abamectin (Ascend TM
, ClinchTM
, VarsityTM
), is a bait product derived
from a soil fungus that inhibits nerve transmission. As a mound treatment, it kills worker ants and
colonies quickly, but as a broadcast treatment it acts more like an insect growth regulator, prevent-
ing the production of viable eggs. Being an insect growth regulator, it causes sterility of the queen,
and eventual death of the entire colony. Fire ant populations were reduced by 87% within six
weeks of treatment (13). Abamectin is quickly degraded in the environment and binds strongly to
soil.
Spinosyns, also known as spinosad (Eliminator Fire A nt Killer Bait with Conserve®, Penn Kill TM
Fire Ant Killer, and others), are natural metabolite products, produced by a soil microorganism,
6. //SUSTAINABLE FIRE ANT MANAGEMENTPAGE 6
(Saccharopolyspora spinosa) that affect the nervous system. Bait formulations have a speed of activ-
ity similar to hydramethylnon and sulfluramid baits.
Insect growth regulators include fenoxycarb, methoprene, and pyriproxyfen (Award®, Logic®,
Extinguish®, Distance®, Spectracide® Fire Ant Bait). These materials mimic the effects of the
insect’s own juvenile hormone, reducing the production of viable eggs and preventing the develop-
ment of worker ants for up to a year after application. T hey do not kill adult ants. Treated ant
colonies persist for several months after treatment, until worker ants present at the time of treat-
ment die naturally. These products are formulated as a bait to be applied to individual mounds or
broadcast.
Fenoxycarb, an insect growth regulator, shows low toxicity to birds, fish, and mammals (13). Field
test results showed 60% of treated colonies were dead after 13 weeks. About 33% of those left had
fewer than 1,000 forager ants. Only 13% of surviving colonies had any worker brood (13).
Boric acid baits
Boric acid has been used to kill a wide variety of insects in various situations for many years. It can
be mixed with sugar or syrup to make a household ant bait as well. In a laboratory study, four
dilutions of boric acid (.25%, .50%, .75% and 1%) were mixed with sugar water and offered as a
bait to treat fire ant mounds. All dilutions achieved 95 to 100% control within 8 weeks (14). Bush-
whacker®
is an 18% boric acid granular bait that is registered for fire ants. A new gel bait contain-
ing orthoboric acid, called Drax Nutrabait, came on the market in July 2003. It is available from the
Waterbury Company. The Web site <http://www.thebestcontrol.com/pests/fireants/ipm2.htm>
mentions electric attractants to baits as well as mechanical disturbance, water controls, kill-clean
enzymes, and orange or grapefruit juice concoctions.
Plant-derived contact insecticides
The following section on fire ant contact insecticides also comes from the University of Georgia
Cooperative Extension Service publication Managing Imported Fire Ants in Urban Areas, available
on the Web at: < http://www.ces.uga.edu/pubcd/B1191.htm#Table1>.
Botanicals include d-limonene, pyrethrins, rotenone, pine oil, and turpentine. These plant-derived
products have various modes of action. D-limonene is a citrus oil extract that kills ants quickly.
Pyrethrins, which act on nerve axons, also kill ants quickly (within minutes to hours) and can be
used as mound treatments or surface sprays. Rotenone acts on respiratory tissues, nerves, and
muscles. Pyrethrins and rotenone products break down rapidly in the environment. Rotenone and
pine oil (turpentine) products are relatively slow-acting (days to weeks) and are applied as mound
drenches. Brand names includ e CitrexTM
, Insecto® Formula 7, Organic Solutions TM
Multipurpose
Fire Ant Killer, Organic Plus® Fire Ant Killer, and others.
Derivatives of Pyrethrins include allethrin, resmethrin, sumithrin, and tetramethrin. These prod-
ucts destabilize nerve cell membranes and kill quickly, but are quickly deactivated and have little
residual activity. They are applied as aerosol injections, mound drenches, or surface sprays. Brand
names include Enforcer® and Fire Ant Kill er.
Other miscellaneous products not listed above include:
Products combining d iatomaceous earth with pyrethrin: O rganic Plus®
, Perma-Guard®
, and Con-
cern®
.
7. //SUSTAINABLE FIRE ANT MANAGEMENT PAGE 7
*piperonyl is prohibited in organic production
Dr. Charles Barr, fire ant specialist with the Texas Cooperative Extension, states that spinosad is
considered organic because it is produced from a bacterial fermentation process that produces a
toxin, which is then extracted and put into a bait. Spinosad baits work well in small areas or as
mound treatments, achieving maximum control in two to four weeks (16). Spinosad costs about $8
to $10 per pound and is available at some lawn and garden outlets. In some cases it may need to be
specially ordered. The bait is best applied during spring and fall when temperatures are warm
(above 65 degrees) but not too hot. Summer applications are best done in the late afternoon or early
evening. Conserve® is one formulation of spinosad. Only the product Justice® can be used on
individual mounds in pastures. Other formulations are labeled for ornamental, turf, plants, yards,
or flowerbeds, but not for anywhere food is grown or animals are grazed (16).
Physical controls
Boiling water
Boiling water is an effective treatment for individual mounds. If it does not kill the queen, it will not
eliminate the colony. Boiling water kills grass and sterilizes soil and may best be considered as a last
resort.
Exxant™, a mound drench consisting of turpentine, ammonia, and other natural products.
A study in Texas led by Dr. B astiaan Drees, Extension Entomologist, evaluated the effectiveness of
organic treatments for fire ant control (15). Six products were compared to three controls: water
drench, Orthene insecticide, and no treatment. The results observed 14 days after treatment are
shown in Table 1.
Table 1. Percent fire ant reduction from six organic insecticide
products, compared to three controls, 14 days after treatment.
Product Percent reduction 14
days after treatment
Organic Plus (pyrethrin + piperonyl)* 98
Insecto Formula 7 (botanical oils) 98
Orthene T. and O. Spray (control) 98
Bonide Rotenone 5 68
Natural Guard Nicotine sulfate 23
Water drench (control) 20
Gardenville Diatomaceous Earth 18
Untreated (control) 5
8. //SUSTAINABLE FIRE ANT MANAGEMENTPAGE 8
References:
1) Harr, Wayne. 2000. Fire ants advance. Tennessee Farmer. N ovember. p . 12, 18.
2) Tschinkel, W.R. 1986. The ecological nature of the fire ant: Some aspects of colony
function and some unanswered questions. p. 72– 87. In: Lofgren, C.S., and R.K. Vander
Meer (eds.) Fire Ants and Leaf Cutting Ants, Biology and Management. Westview Press,
Boulder, CO.
3) Gilbert, L.E. 1996. Prospects of controlling fire ants with parasitoid flies: The perspective
from research based at Brackenridge field laboratory. Presented March 23, 1996. Pro-
ceedings of A Second Conference on Quail Management. Available at: http://
www.utexas.edu/research/bfl/research/gilbert/prospects.html
4) Vargo, E.L., and S.D. Porter. 1989. Colony reproduction by budding in the polygyne
form of Solenopsis invicta (Hymenoptera: Formicidae). Annals of the Entomological
Society of America. Vol. 82 . p. 307–313.
5) Porter, S.D., and D. Savignano. 1990. An i nvasion of polygyne fire ants decimates native
ants and disrupts arthropod community. Ecology. Volume 71. p. 2095-2106.
6) Drees, Bastiaan M., et al. No date. Evaluation of Organic Treatments for Red Imported
Fire Ant Mounds. Available at: http://fireant.tamu.edu/research/arr/Category/Indi-
vidual/92-93Pg47/92-93Pg47.pdf
To use hot water as a mound treatment for fire ants, start with a sunny but cool day when ants are
near the surface. Be careful to avoid scalding yourself! Pour about three gallons of boiling water
slowly over the mound. Try to collapse as much of the mound as possible while pouring. Portable
boilers that generate hot water and steam are available. The Original Ant Eater is one such boiler,
available from M&B Enterprises (see Resources). The boiler comes with a dome-shaped delivery
device that is placed over the mound and through which the steam passes. The ants, their larvae,
and their stored food are all scalded within seconds. A hot-water pressure washer can also be used
to apply steam and hot water to ant hills.
Other
"Earthfire" is a species specific mound injection tool used to kill whole RIFA mounds in seconds.
It is a hand-held tool complete with a propane cylindar, trigger assembly, and probe that is
inserted in the mound. Once the probe is in the mound, the trigger is pulled, releasing a propane-
charged insecticide into th e mound. The tool is a patented low -pressure, sub-surface vapor-
delivery device. It w orks by creating a venturi, causing the vapor to fill the entire fire ant mound
from the bottom up. The ants suffocate from the vapor throughout the tunnel network. The EPA
approved and registered pesticide used is a 1% formulation of Resmethrin, a pyrethrin derivitive.
Resmetrin is a class III pesticide and has an LD-50 (rat) toxicity of > 2500 mg/kg. It is much less
toxic than Dursban, Diazinon, and Rotenone. For more information on Earthfire, contact Pete
Johnson. (see Resources).
The Ant Charmer™ is a solar-powered ant trap that catches ants and drowns them in a soapy
water solution. It is available from Heitman Laboratories (see Resources).
Medusa Ant™, a complete ant management system using biological control methods, is available
from Praxis. Medusa Ant is listed for carpenter ants and other species. It is pesticide-free.
9. //SUSTAINABLE FIRE ANT MANAGEMENT PAGE 9
7) Anon. 2000. USDA, southern states to release fl y against f ire ants. AgVentures. Decem-
ber. p. 23.
8) Weaver-Missick, Tara. 1999. Ouch! The fire ant saga continues. Agricultural Research.
September. p. 5–8.
9) David Williams (USDA, ARS, CMAVE)
P.O. Box 14565
Gainesville, FL 32604
352-374-5982
10) Wolfshohl, Karl. 2000. Fighting fire with fire. Progressive Farmer. October. p. 40–41.
11) Chenault, Edith A., and Bart Drees. 1999. Biological control offers hope for fighting fire
ants. http://agnews.tamu.edu/stories/ENTO/Sep1699a.htm.
12) Troy Biosciences
113 South 47 th
Avenue
Phoenix, AZ 85043
800-448-2843
http://www.troybiosciences.com/
13) Quarles, William. 1998. Living with fire ants. Common Sense Pest Control. Summer. p.
5–16.
14) Klotz, J.H., K.M. Vail, and D.F. Williams. 1997. Toxicity of boric acid-sucrose water bait
to Solenopsis invicta. Journal of Economic Entomology. Volume 90, Number 2. p. 488-
491.
15) Drees, Bastiaan M., and S. Br adleigh Vinson. No date. Fire Ants and Their Management.
B-1536. Texas Agricultural Extension System, College Station, TX. 18 p.
16) Chenault, Edith A. 2003. Organic fire ant baits available. American Small Farm. May.
p. 24.
Fire Ant Resources:
For additional information about imported fire ant management, contact your county Extension
agent and visit these World Wide Web sites:
http://fireant.tamu.edu This is one of the most comprehensive sites available on fire ants.
http://www.ag.auburn.edu/dept/entplp/FireAnts/ The Alabama fire ant site.
http://www.lsu.edu/ants/index.shtml
http://www.ces.uga.edu/pubcd/b1068-w.html
http://www.safe2use.com/pests/fireants/fireants1.htm
A Review of “Organic” and Other Alternative Methods for Fire Ant Control by Dr. Bastiaan Drees,
Fire Ant Project Coordinator at the Texas A&M University. A copy is available on the Web or
may be obtained from Dr. Drees at:
10. //SUSTAINABLE FIRE ANT MANAGEMENTPAGE 10
Department of Entomology
2475 TAMU
Texas A&M University
College Station, TX 77843-2475
979-845-5895
979-845-7029 FAX
E-mail: b-drees@tamu.edu
http://fireant.tamu.edu/materials/factsheets/FAPFS012.2002rev.pdf
Other publications on the subject of fire ants at this Web site include:
♦Fire Ants and their Management
♦Managing Red Imported Fire Ants in Agriculture
♦Managing Red Imported Fire Ants in Urban Areas
♦The Two-Step Method for Fire Ant Control
♦Pattern of Interactions Among Imported Fire Ants and Native Ants on the Invasion Boundary
♦Potential Biological Control Agents for the Red Imported Fire Ant
BIRC, Bio-Integral Resource Center, a non-profit corporation, provides practical information on
the least-toxic methods for managing pests based on IPM principles. BIRC publishes the Common
Sense Pest Control Quarterly. It can be subscribed to by contacting:
BIRC
PO Box 7414
Berkely, CA 94707
510-524-2567
http://www.birc.org
Suppliers of least-toxic fire ant control products:
ARBICO (D.E., Boric acid powder and ant bait, Insecto Formula 7, Rotenone)
P.O. Box 4247 CRB
Tucson, AZ 85738
800-827-2847
http://www.goodearthmarketplace.com
Bethurum Research & Development, Inc. (Bushwhacker boric acid product)
P.O. Box 345
Rancho Mirage, CA 92270
800-422-2687
http://www.bethurum.com
Gulf Coast Bio tic Technology Inc. (ANTidote beneficial nematode formulation)
1041 Elkins Lane
Huntsville, TX 77320
11. //SUSTAINABLE FIRE ANT MANAGEMENT PAGE 11
Heitman Labs (solar powered ant trap)
6829 K Avenue, Suite 112
Plano, TX 75074
800-472-5024
972-509-2400
972-509-2401
http://www.antcharmer.com
M & B Enterprises (steam ant mound killer)
Box 27
Norphlet, AR 71759
870-546-3552
Earthfire
Pete Johnson
Earthfire Corp. -- for fire ant eradication
Scottsdale AZ 85 267
480-951-3654
480-951-0040 FAX
E-mail: johnsoncom@aol.com
Syngenta (Award and Logic growth regulator baits)
Box 18300
Greensboro, NC 27419
800-334-9481
http://www.syngenta.com
Organic Solutions (Fireant killer #107)
8745 Grissom Road
San Antonio, TX 78251
800-862-7482
210-688-3416
http://www.organicinsecticide.com
Planet Natural (Ascend Abamectin bait)
1612 Gold Avenue
Bozeman, MT 59715
800-289-6656
406-587-5891
http://www.planetnatural.com/
Praxis (Medusa Biotool kit for fire ants - a site-specific ant management system)
2723 116th
Avenue
Allegan, MI 49010
616-673-2793
http://www.praxis-ibc.com
E-mail: p raxis@allegan.net
12. //SUSTAINABLE FIRE ANT MANAGEMENTPAGE 12
Troy Biosciences (developing a biological control product from Beuvaria bassiana.)
113 South 47 th
Avenue
Phoenix, AZ 8504 3
800-448-2843
http://www.troybiosciences.com/
Wellmark International (Extinguish fire ant bait)
1100 East Wood Field Road, Su ite 500
Schaumburg, IL 60173
800-842-3134
847-330-5300
http://www.zoecon.com
The Eradicator (mound venturi injection system)
Park North Technology Center
255 West Airtex
Houston, TX 77090
713-876-7153
713-876-0043 FAX
Lang Laboratories, Inc. (producer of Exxant™)
P.O. Box 565
Scottsville, TX 75688-0565
903-938-2272
http://www.exxant.com
The electronic version of Sustainable Fire Ant
Management is located at:
HTML:
http://www.attra.ncat.org/attra-pub/ fireant.html
PDF
http://www.attra.ncat.org/attra-pub/PDF/
fireant.pdf
By Preston Sullivan
NCAT Agriculture Specialist
Edited by Paul Williams and David Zodrow
Formatted by Cynthia Arnold
November 2003
CT068
Slot 109