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Field Crop Insect Update Changes in Pest Management

Field Crop Insect Update Changes in Pest Management. Ric Bessin Extension Entomologist University of Kentucky Lexington. Pest Management Changes. Preventive Controls Bt crops Seed treatments All seed treated with some companies More stacked Bts (CB + RW) Pest Monitoring

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Field Crop Insect Update Changes in Pest Management

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  1. Field Crop InsectUpdateChanges in Pest Management Ric Bessin Extension Entomologist University of Kentucky Lexington

  2. Pest Management Changes • Preventive Controls • Bt crops • Seed treatments • All seed treated with some companies • More stacked Bts (CB + RW) • Pest Monitoring • Doug Johnson and Patty Lucas • Higher input costs/grain prices • Effect of Economic thresholds?

  3. Changes in Pest Populations Less Common More common Wireworms Corn Rootworm Stink bug Soybean stem borer Armyworms Soybean aphid • Black cutworm • European corn borer • SW corn borer • Fall armyworm • Flea beetles

  4. Bt’s for Corn Pests YieldGard Corn Borer (Cry1Ab) YieldGard Rootworm (Cry3Bb1) YieldGard Plus (Cry1Ab+Cry3Bb1) Herculex (Cry1F) Herculex RW (Cry34Ab1+Cry35Ab1) Herculex Xtra (Cry1F+Cry34Ab1+Cry35Ab1) Agrisure CB (Cry1Ab) Agrisure RW (mCry3A) Agrisure CB/RW(Cry1AB+mCry3A) YieldGard VT RW (Cry3Bb1) YieldGard VT Triple (Cry1Ab + Cry3Bb1)

  5. Insects Controlled by Bt Corn

  6. Future Directions of Bt Corn • Resistance Management • Redundant Bt genes • SmartStax • New refuge strategies • AcresMax

  7. YieldGard RW, Urbana, July 2, 2007: Mike Gray, Univ of IL

  8. MONSANTO, DOW AGREEMENT PAVES THE WAY FOR INDUSTRY’S FIRST-EVER, EIGHT-GENE STACKED OFFERING IN CORNStacked product combines Dow AgroSciences’ and Monsanto’s insect-protection and weed control trait technologies; product set to deliver greater performance, value and options for farmersINDIANAPOLIS and ST. LOUIS (Sept. 14, 2007) – Monsanto (NYSE: MON) and Dow AgroSciences LLC, a subsidiary of The Dow Chemical Company (NYSE: DOW), have reached a cross-licensing agreement aimed at launching SmartStax™, the industry’s first-ever eight-gene stacked combination in corn. The agreement is expected to create a new competitive standard for stacked-trait offerings and present an expanded growth opportunity for both companies’ seed brands and traits businesses by the end of the decade.

  9. Resistance Management • High-dose refuge strategy • Need 500:1 susceptible to resistant ratio • No more than 80% Bt corn • Refuge within ½ mile for CB Bt’s • Refuge immediately adjacent for RW and CB/RW Bt lines

  10. When is Bt Corn Needed? • Bt CB – • Late planted corn • Corn planted after May 5 • Bt RW – • Corn following corn >2 yrs • Bt CB + RW – • When both of the above is true

  11. Yield Benefit by Planting Date, 6-Year Average * UKREC: Herbek, Johnson, Bessin

  12. Results of Hybrid Preformance Trials • Many Single, Double and Triple stacks yielded very well in 2007 • Even where RW and CB pressure low

  13. Seed Treatments • On virtually all corn seed • Providing insect control to help with stand establishment • Other benefits • Seedling vigor?

  14. Seed Treatments and Vigor • In some studies, a yield bump not due to insect protection • Micro array data showing drought & cold tolerance, and other stress related genes turned on • Does not occur in all situations, not well understood

  15. Direction of Seed Treatments • Vigor enhancement • Nematode control • Resistance management – new classes of insecticides for seed treatments

  16. Insects Controlled

  17. Pest Monitoring • Armyworm • Black Cutworm • ECB and SWCB • Corn earworm • Fall Armyworm

  18. Overwintering SWCB Survival Caldwell, Henderson, Davies, Hardin Counties Four fields/county

  19. Summary of European Corn Borer Fall Surveys,University of Illinois Extension1943-2007 Kevin Steffey: Univ of IL

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