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Whitefly Management in the Landscape Chemical Control

Whitefly Management in the Landscape Chemical Control. In Service Training University of Florida IFAS March 12, 2013. Management of Whitefly in the Landscape. Biological Control Cultural control Alternative plant choices (ficus whitefly) Washing plants off with water Soaps and oils

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Whitefly Management in the Landscape Chemical Control

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  1. Whitefly Management in the Landscape Chemical Control In Service Training University of Florida IFAS March 12, 2013

  2. Management of Whitefly in the Landscape • Biological Control • Cultural control • Alternative plant choices (ficus whitefly) • Washing plants off with water • Soaps and oils • Strictly contact; requires thorough coverage; multiple applications (7-10 days); potential phytotoxicity under high temperatures

  3. What are the Variables Associated with Successful Pesticide Applications? Target Pest(s) Product (a.i.) Application Method (foliar, drench broadcast, injection, etc) Growing Environment (container, field, greenhouse, landscape, etc) Environment Type of Plant

  4. Foliar Applications • Whitefly should be present • Soaps and oils • Strictly contact; short term • Excessive wax may restrict contact • Foliar insecticides may provide quick control, most will not provide long-term control. • Some foliar insecticides (i.e. pyrethroids) may disrupt the natural enemies and should be used very selectively.

  5. Insecticide SelectionFoliar ApplicationProfessional Use (Landscape and Nursery) Flonicamid (Aria) Horticultural oil Imidacloprid (Merit, Marathon, Discus, Allectus) Pymentrozine (Endeavor) Pyriproxyfen (Distance) Spiromesifen (Judo) Beauveria bassiana (BotaniGard) Abamectin (Avid) Acetamiprid (TriStar) Azadirachtin (Azatin XL) Bifenthrin (Talstar) Buprofezin, (Talus) Clothianidin (Arena) Endosulfan (Endosulfan; Thiodan)

  6. Management with Systemic Insecticide Applications Neonicotinoid insecticide group applied to the soil or trunk to achieve systemic properties Transpiration Transportation Absorption

  7. Clothianidin Acetamiprid Dinotefuran Imidacloprid Thiamethoxam Relative Water Solubility of Neonicotinoids Slide information courtesy C. Sclar. Longwood Gardens

  8. UV Stability of Neonicotinoids Slide Credit: Presentation by C. Sclar, Longwood Gardens Data obtained from published EPA registration documents (R. Fletcher)

  9. Systemic Insecticide ApplicationSoil Methods Drenching Granular or pellets Photos: H. Glenn, UF/IFAS

  10. Systemic Insecticide ApplicationTrunk Methods Photos: H. Glenn, UF/IFAS and J. Chamberlin, Valent, Inc. Trunk spray Injection

  11. Methods of ApplicationPros and Cons • Drenching • Water requirement • Clearing of area of application • Preferably used when soils are moist • Does not require specialized equipment • Relatively easy • Granular applications • Typically the slowest acting • Should be followed with water • Easy to apply • Does not require specialized equipment

  12. Methods of ApplicationPros and Cons • Injection • Fast response • Requires specialized equipment and formulations • Must have knowledge of proper use • Damage to trees ? • Other active ingredients available • Basal bark spray • Fast response • Reduced water requirements • Easy to apply • Does not require specialized equipment but does require some sort of sprayer

  13. Neonicotinoid Insecticides • Most commonly used a.i. • Imidacloprid > clothianidin > dinotefuran • Most common method of application • Drench > tree injection > trunk spray • Some soil application with granular • Some foliar use

  14. Soil and Foliar Application of Insecticides Ficus Whitefly

  15. Soil and Foliar Application of Insecticides Ficus Whitefly

  16. Neonicotinoid Uptake Royal Palm (25-30 ft) – Soil Application Applied April 11, 2009 Dr. A. D. Ali (Davey Tree), Walter Albeldano (Valent USA Corp).

  17. Safari Uptake into Foliage Mexican Fan Palm (13” dbh) Applied: May 7, 2011 Buzz Uber (Crop Inspection Service), Walter Albeldano (Valent USA Corp).

  18. Length of Control • Important to monitor for active pest populations to determine time of re-treatment • Rule of Thumb: Do not retreat until the pest population is observed to be increasing again • Neonicotinoids (applied as soil or trunk treatments) • Generally provide long-term control (6 – 12 months) • Use rate, formulation, environmental conditions, tree species and a.i. can affect uptake and length of control

  19. Neonicotinoid Insecticides • Application to coconuts • Landscape: ornamental vs edible plant • Affects on pollinators (particularly bees) • Toxic to bees • Systemic applications –use lowest effective dose • Avoid use on tree species highly attractive to pollinators; Use after bloom • Impact of other types of insecticides

  20. Using Neonicotinoid Insecticides There are numerous options on how to apply the neonicotinoids: • There is no “best” a.i. or method - take advantage of the different methods and formulations • Fit the method(s) of application for the site • The site and method needs to be on the label • Consider the methods that gets the needed result with the least negative impact on the environment/non-targets

  21. http://extension.usu.edu/files/publications/publication/NR_FF_020pr.pdfhttp://extension.usu.edu/files/publications/publication/NR_FF_020pr.pdf http://www.ctpa.org/EAB%20Files/Clippings2010.pdf

  22. QUESTIONS

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