This document discusses several major insect pests of cotton in Pakistan, including cotton jassid, whitefly, thrips, mealybug, dusky cotton bug, and red cotton bug. For each pest, it provides the scientific name, description of life stages, life cycle, mode of damage, and control methods (cultural, biological, chemical). It aims to inform readers about integrated pest management of these key cotton pests.
Implementation and impact of IPM. Safety issues in pesticide use. Political, ...Nikhil Kumar
IPM packages tested at several research centres vis-a-vis the farmers’ practices indicate superiority of the former. IPM practices enabled reduction in the number of chemical sprays. IPM system also resulted in increase of natural enemies by three-fold, reduced the insecticide and environmental pollution (Dhaliwal and Arora, 1996).
An integrated strategy for the management of major pests and diseases is possible by
I. breeding new varieties with built-in resistance,
II. evolving efficient methods of pest control through pest surveys and monitoring, and
III. biological control of pests with the help of conservation and augmentation of natural enemies like parasites, predators and insect pathogens.
The
Most destructive insect devastating the cotton fields of Adilabad district.The presentation has rich in content with realistic photos and management practices.
The Presentation is prepared by N.S Institution of science, Markapur.
It consists of a basic introduction related to hybrid seed production related to rice.
Implementation and impact of IPM. Safety issues in pesticide use. Political, ...Nikhil Kumar
IPM packages tested at several research centres vis-a-vis the farmers’ practices indicate superiority of the former. IPM practices enabled reduction in the number of chemical sprays. IPM system also resulted in increase of natural enemies by three-fold, reduced the insecticide and environmental pollution (Dhaliwal and Arora, 1996).
An integrated strategy for the management of major pests and diseases is possible by
I. breeding new varieties with built-in resistance,
II. evolving efficient methods of pest control through pest surveys and monitoring, and
III. biological control of pests with the help of conservation and augmentation of natural enemies like parasites, predators and insect pathogens.
The
Most destructive insect devastating the cotton fields of Adilabad district.The presentation has rich in content with realistic photos and management practices.
The Presentation is prepared by N.S Institution of science, Markapur.
It consists of a basic introduction related to hybrid seed production related to rice.
Common name : Bush okra, jews mallow
Chromosome number : 2n=2x=14
Family : Tiliaceae
The two important cultivated species in Jute are
White Jute : Corchorus capsularis
Tossa Jute : Corchorus olitorius
Jute is a natural fibre popularly known as “golden fibre.” It is one of the cheapest and the strongest of all natural fibres. Jute is second only to Cotton in world’s production of textile fibres. Retting is the process of extracting fibre from stem of the jute plants.
Bangladesh is an agricultural based country located in South Asia. Agriculture is the prime occupation of the major peoples in Bangladesh. In 1947-48 Bangladesh grown about 80% of total jute in the world which produced lot of foreign money that was majority of the total revenue of the country. For this reason jute is called as "Golden Fiber" of Bangladesh. Jute is one of the cheapest and the strongest of all natural fibres and considered as fibre of the future. Raw jute is the natural fibre which is extremely eco-friendly. Bangladesh is the biggest producer of natural jute or raw jute fibre both in quantity and quality .The other countries grow Jute plant are India, Nepal, China, Myanmar, Vietnam, Thailand etc.
Common name : Bush okra, jews mallow
Chromosome number : 2n=2x=14
Family : Tiliaceae
The two important cultivated species in Jute are
White Jute : Corchorus capsularis
Tossa Jute : Corchorus olitorius
Jute is a natural fibre popularly known as “golden fibre.” It is one of the cheapest and the strongest of all natural fibres. Jute is second only to Cotton in world’s production of textile fibres. Retting is the process of extracting fibre from stem of the jute plants.
Bangladesh is an agricultural based country located in South Asia. Agriculture is the prime occupation of the major peoples in Bangladesh. In 1947-48 Bangladesh grown about 80% of total jute in the world which produced lot of foreign money that was majority of the total revenue of the country. For this reason jute is called as "Golden Fiber" of Bangladesh. Jute is one of the cheapest and the strongest of all natural fibres and considered as fibre of the future. Raw jute is the natural fibre which is extremely eco-friendly. Bangladesh is the biggest producer of natural jute or raw jute fibre both in quantity and quality .The other countries grow Jute plant are India, Nepal, China, Myanmar, Vietnam, Thailand etc.
This presentation contains valuable information on major insect pests of stored foods like Angoumois grain moth, Indian meal moth, Rice moth, Potato tuber moth etc.
Cotton sucking Insect pests and Integrated management.pdfmuhammad1562002
Cotton sucking pests are a group of insects that feed on the sap of cotton plants, causing damage to the crops and reducing yield. These pests can include aphids, whiteflies, and leafhoppers, among others. They use their piercing-sucking mouthparts to extract nutrients from the plant tissues, particularly from the leaves, stems, and buds of cotton plants.
Aphids are small, soft-bodied insects that can be green, black, brown, or pink in color. They reproduce rapidly, and their populations can quickly build up on cotton plants, leading to stunted growth and distorted leaves. Whiteflies are tiny insects with white wings that resemble tiny moths. They often gather on the undersides of leaves and can cause yellowing, wilting, and premature leaf drop. Leafhoppers are small, wedge-shaped insects that can transmit diseases to cotton plants while feeding.
These pests not only directly damage the cotton plants by feeding on them but can also transmit viruses and diseases, further compromising the health and yield of the crop.
Richard's aventures in two entangled wonderlandsRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Seminar of U.V. Spectroscopy by SAMIR PANDASAMIR PANDA
Spectroscopy is a branch of science dealing the study of interaction of electromagnetic radiation with matter.
Ultraviolet-visible spectroscopy refers to absorption spectroscopy or reflect spectroscopy in the UV-VIS spectral region.
Ultraviolet-visible spectroscopy is an analytical method that can measure the amount of light received by the analyte.
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
The ability to recreate computational results with minimal effort and actionable metrics provides a solid foundation for scientific research and software development. When people can replicate an analysis at the touch of a button using open-source software, open data, and methods to assess and compare proposals, it significantly eases verification of results, engagement with a diverse range of contributors, and progress. However, we have yet to fully achieve this; there are still many sociotechnical frictions.
Inspired by David Donoho's vision, this talk aims to revisit the three crucial pillars of frictionless reproducibility (data sharing, code sharing, and competitive challenges) with the perspective of deep software variability.
Our observation is that multiple layers — hardware, operating systems, third-party libraries, software versions, input data, compile-time options, and parameters — are subject to variability that exacerbates frictions but is also essential for achieving robust, generalizable results and fostering innovation. I will first review the literature, providing evidence of how the complex variability interactions across these layers affect qualitative and quantitative software properties, thereby complicating the reproduction and replication of scientific studies in various fields.
I will then present some software engineering and AI techniques that can support the strategic exploration of variability spaces. These include the use of abstractions and models (e.g., feature models), sampling strategies (e.g., uniform, random), cost-effective measurements (e.g., incremental build of software configurations), and dimensionality reduction methods (e.g., transfer learning, feature selection, software debloating).
I will finally argue that deep variability is both the problem and solution of frictionless reproducibility, calling the software science community to develop new methods and tools to manage variability and foster reproducibility in software systems.
Exposé invité Journées Nationales du GDR GPL 2024
4. Cotton Jassid
Scientific name: Amarasca bigutulla
Family: Cicadellidae
Order: Homoptera
Status: Most destructive pest of American Cotton.
Distribution: Throughout the cotton growing areas of the Punjab, Pakistan and India.
Food Plants: Besides cotton it is also feeds on brinjal, potato, bhindi and some wild
plants such as hollyhock, kangi booti.
ETL: 1 per leaf
5. Description of Stages
Adult: In Summer, adults are greenish yellow with a blackspot present on the tip
of each forewing.
Egg: Yellowish white.
Nymph: Nymphs wedge-shaped and are very active.
7. Mode of damage
Damage to the crop is caused by the adults as well as by the nymphs.
Suck cell sap from the underside of the leaves.
The leaf first becomes yellowish due to pest attack and later gives cup shaped
appearance.
The number of boll formation is reduced. The lint quality is deteriorated.
Injury to plants:
The loss of cell sap due to sucking.
The injection of toxins while sucking.
8. Control
Cultural:
Cotton crop should be earlier and excessive use of fertilizer should be avoided.
Clean cultivation and removal of weeds.
Hairy varieties are less attacked by jassids.
Biological:
Chrysoperla sp. and the spiders are good predators of its nymphs and adults.
Chemical: 1- Thiamethoxicam 3.0g/kg seed 2- Imidacloprid 5g/kg seed
3- Diafenthiuron 200-500g/acre 4- Buprofezin 500g/acre
9. Cotton Whitefly
Scientific name: Bemisia tabaci
Family: Aleyrodidae
Order: Homoptera
Status: Most notorious pest insect of cotton and transmits 50 plant viruses
on the 70 different plants. It become more important in Pakistan as
it transmit CLCV.
Distribution: Tropical and subtropical areas of Pakistan and India.
Food Plants: It attacks 600 plants over 70 families of crop and weeds including
cotton, sunflower, jute, bhindi, tori, cauliflower, cabbage etc.
ETL: 5 per leaf.
10. Description of Stages
Adult: Body is yellowish and is covered with white, fine waxy powder.
Egg: Freshly laid eggs are creamy white in color and changed to brown before
hatching.
Nymph: Nymphs are yellowish to brown in color. 4 nymphal instars are found. The
last instar is also called as pupa.
11. Life Cycle
Egg
Nymph
Adult
Lay 110 Eggs
Hatching in 3-5 Days
9-14 Days from April-Sept
17-81 Days from Oct-March2-5 Days in summer
24 days in November
12. Mode of damage
The whiteflies are very harmful insects and pose great threat to agriculture across the
world including Pakistan. Its damage is following ways:
Sucking cell sap
The young ones and adults suck the leaf sack from phloem tissue by remaining on
the under surface of leaf.
Leaves turn yellowish-brown and fall-off.
Injection of toxic saliva
They inject saliva into the plants that alters the abnormal physiological processes
and thus results in plants disorder.
.
13. Continue……
Sooty mould:
They produce enormous amount of honeys dews and throw on various plant
parts. This sticky material helps in the germination of sooty mould.
Cotton leaf curl virus(CLCV):
White fly is responsible for the transmission of about 50 viral diseases on 70
different plants including cotton leaf curl virus.
14. Control
Cultural:
Avoid cultivation of alternate hosts near the cotton field and destroy weed
hosts and crop stubbles including cotton sprouts as they may harbor whitefly
and virus.
Avoid application of high amount of nitrogenous fertilizers in the cotton crop.
Avoid over-irrigation in the cotton field.
Pressurized water may be helpful in effectively killing of adults of whitefly.
Biological:
Chrysoperla sp. And Brumus sp. Are effective predators of its nymphs and adults.
Eretmocerous massii and encarsia sp. Can cause 33% and 5-10% parasitism
respectively to its adults and pupae.
Chemical: 1- Imidacloprid 5-7 g/kg seed 2- Diafenthiuron 200-500 ml/acre
3- Buprofezin 500 g/acre
15. Cotton Thrips
Scientific name: Thrips tabaci
Family: Thripidae
Order: Thysanoptera
Status: Major pest of cotton.
Distribution : It is world-wide in distribution and found throughout Pakistan and India.
Food Plants: Besides cotton ,Onion and Garlic it also attacks on several plants
including Cabbage , Cauliflower , Potato, Tobacco ,Cucumber etc.
ETL: 8-12 per leaf
16. Description of Stages
Adult: Adults are slender, yellowish brown or blackish.
Egg: The female lays kidney shaped eggs singly.
Nymph: Nymphs are pale in colour.
18. Mode of damage
It is a serious pest of cotton in hot and dry conditions. Both adult and nymphs attack
usually eat cotton seedlings by leaf rasping the pest sucks up the exuding sap. In
case of severe pest attack on cotton, leaves become wrinkled and fall off and case
opening of premature bolls. Lower leaves are severely damaged during attack.
Infested leaves become silvery white, then dirty white and ultimately become
crumple shape. The plant bear very few bolls.
20. Cotton Mealy Bug
Scientific name: Phenococcus gossypiphilus
Family: Pseudococcidae
Order: Hemiptera
Status: Important pest of cotton.
Distribution: Pakistan, USA, South Africa, Brazil.
Food Plants: Polyphagous. Parthenium, Itsit, Datura, Milkweed, cotton, Okra.
ETL: Visual.
21. Description of Stages
Adult: Female adult is wingless and body is covered with white mealy powder
while the male has transparent wings.
Egg: Eggs are oblong and light yellow.
Nymph: They are oval and yellow with prominent reddish eyes .
23. Mode of damage
Damage is caused by the nymphal stage and adult females only
Sucking cell sap.
Honey dew secreted by the pest encourages development of black sooty mold.
Injection of toxic saliva.
Secretion of cottony wax.
Bolls are deformed, fewer and smaller in size in affected plants.
24. Control
Cultural:
Uprooting of infested plants.
Cutting of infested leaves and twigs and there burial deap in the soil
Remove alternate host plant
Clean cultivation of weeds
Biological:
Chrysoperla carnea, lady bird beetle, paper wasp, red wasp.
Chemical: 1- Imidacloprid 2- Chlorpyriphos
3- Buprofezin
25. Dusky Cotton Bug
Scientific name: Oxycarenus laetus
Family: Lygaeidae
Order: Hemiptera
Status: Minor pest of cotton.
Distribution: Cotton growing areas of Pakistan and India.
Food Plants: Cotton, Bhindi, Hollyhock.
26. Description of Stages
Adult: Adults are dark brown with dirty white transparent wings and measure
and measure about 4-5mm in length.
Egg: White and cigar shaped eggs. Laid singly or in clusters.
Nymph: They resemble the adults except being smaller and having prominent
wing pads in place of wings.
28. Mode of damage
Its main importance lies in the fact that the adults and nymphs when crushed at
the time of ginning to the lint and thus lower the market price of cotton.
Nymphs and adults suck cell sap from immature seeds, which may not ripen and
lose colour and remain light weight.
29. Control
Biological:
Triphleps tantilus is effective parasitoid on its nymph.
Chemical: 1- Acetamiprid 125 g/acre 2- Imidacloprid 80 ml/acre
3- Diafenthiuron 200-500 ml/acre 4- Carbosulfan 500 ml/acre
30. Red Cotton Bug
Scientific name: Dysdercus koenigii
Family: Pyrrhocoridae
Order: Hemiptera
Status: Minor pest of cotton in the punjab
Distribution: Widely distributed in Pakistan and India.
Food Plants: Cotton, Bhindi, Maize, millet, wheat, gram , hollyhock , clovers etc.
31. Description of Stages
Adult: Bugs are elongated slender insects and crimson red with white bands
across the abdomen.
Egg: Spherical and bright yellow.
Nymph: Young nymph have flabby abdomen but later they become more slender
and develop black markings on the body.
33. Mode of damage
Both adult and nymph of this pest suck cell sap from leaves and green bolls of cotton.
Heavily attacked bolls open badly and the lint is of poor quality .The seed produced
may also have low germination and less oil contents.
Bugs stain the lint with their excreta or body juices as they get crushed in the ginning
factories .Thus this pest is also called as Cotton Stainer.
The staining of the lint; which is usually followed by the growth of certain bacteria
inside the bolls, is also believed to be initiated by the bugs.
34. Control
Biological:
Predacious bugs such as Antilochus cocqueberti.
Harpactor costalis are predators of nymph and adults.
Chemical: 1- Acetamiprid 125 g/acre 2- Imidacloprid 80 ml/acre
3- Diafenthiuron 200-500 ml/acre 4- Carbosulfan 500 ml/acre