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Tech On Demand: Controlling Insect Pests on Tropical Plants
Aug. 29, 2022•0 likes•148 views
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Environment
In this slideshow, tropical and foliage plant expert Andrew Britten focuses on insects, because they’re something a lot of growers struggle with when they finish tropical and foliage crops across North America. He begins with an overview of the most common pests dealt with in tropical plant production and what kinds of damage to look for when identifying them. These “usual suspects” include aphids, spider mites, mealybug, whitefly and thrips. Then, he turns his attention to managing and controlling these pests, talking about both conventional chemical and biological controls. The goal with this presentation is to help you produce your best crops ever and send clean, healthy tropicals and foliage to market.
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Tech On Demand: Controlling Insect Pests on Tropical Plants
- Controlling Insect Pests on Tropical Plants
- Most Common Insects Aphids Spider Mites Mealybug Whitefly Thrips
- Damaged Caused by Insects
- Aphids on Hibiscus • Can produce 12 offspring per day without mating • May transmit viruses • Seldom kill a plant but can turn leaves yellow and stunt shoots • Buds can abort with enough infestation • Create honeydew which can become sooty mold
- Spider Mites on Cordyline • Larvae hatch and complete development in 1-2 weeks • Reproduction faster in warm temperatures • Use piercing-sucking mouthparts to feed on sap • Give leaves a stippled appearance • Infestations more likely when hot and dry
- Mealybug on Hibiscus • Lay 100-200 or more eggs over a 10- 20 day period • Suck sap from plant phloem • There are over 170 species of mealybug • Secrete honeydew resulting in sooty mold • Can attack stems, leaves, flowers and roots • Covered in a powdery wax
- Thrips on Schefflera • Life cycle can be as short as 2 weeks in warm conditions • Feeding results in scar formation as well as distorted growth • Feed by puncturing the epidermal layer of host tissue and sucking out the cell contents • Have up to 8 generations per year • May transmit viruses
- Whitefly on Hibiscus • They are sap sucking insects that can cause yellowing or death of leaves • Typically found on the underside of leaves • Also secrete honeydew • Despite their name, they are not truly flies but are in the order hemiptera
- Control of Insect Populations
- Aphids • Bio Controls • Botanigard – 16 oz/100 • Aphidius colemani • Chrysopa carnea • Chemical Controls • M-Pede (UNM)– 1 gallon/100 • Flagship (4a) – 8 oz/100 • Endeavor (9b) – 5 oz/100 • Mainspring (28) – 8 oz/100 • Aria – (9c)2 oz/100
- Spider Mites • Bio Controls • Phytoseiulus persimilus • Amblyseius andersoni • Amblyseius californicus • Chemical Controls • Pylon (13)– 5.2 oz/100 • Sultan (25a) - 13.7 oz/100 • Avid (6)– 8 oz/100 • Floramite (25)– 8 oz/100 • Sanmite (21a)– 9.6 oz/acre
- Mealybug • Bio Controls • Chrysopa carnea • Cryptolaemus montrouzieri • Chemical Controls • Mesurol (1a)– 8 oz/100 • Orthene (1b)– 10 oz/100 • Tristar (4a)– 2.7 oz/100 • Rycar (9b)– 6.4 oz/100 • Horticultural Oil - 2%
- Whitefly • Bio Controls • Encarsia Formosa • Eretmocerus eremicus • Amblyseius swirskiii • Chemical Controls • Avid (6)– 8 oz/100 • TriStar (4a)– 2.7 oz/100 drench • Mainspring (28)– 8 oz/100 • Kontos (23)– 3.4 oz/100 drench • Altus (4d)– 3.7 oz/100 drench
- Thrips • Bio Controls • Orius laevigatus • Amblyseius cucumeris • Amblyseius swirskii • Chemical Controls • Kontos (23)– 3.4 oz/100 drench • Mainspring (28)– 10 oz/100 drench • Mesurol (1a)– 16 oz/100 • Overture (UN)– 8 oz/100
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