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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

Field Crop InsectUpdateChanges in Pest Management

Ric Bessin

Extension Entomologist

University of Kentucky

Lexington

pest management changes
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?
changes in pest populations
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
bt s for corn pests
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)

future directions of bt corn
Future Directions of Bt Corn
  • Resistance Management
  • Redundant Bt genes
    • SmartStax
  • New refuge strategies
    • AcresMax
slide8

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.

resistance management
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
when is bt corn needed
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
yield benefit by planting date 6 year average
Yield Benefit by Planting Date, 6-Year Average

* UKREC: Herbek, Johnson, Bessin

results of hybrid preformance trials
Results of Hybrid Preformance Trials
  • Many Single, Double and Triple stacks yielded very well in 2007
  • Even where RW and CB pressure low
seed treatments
Seed Treatments
  • On virtually all corn seed
  • Providing insect control to help with stand establishment
  • Other benefits
    • Seedling vigor?
seed treatments and vigor
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
direction of seed treatments
Direction of Seed Treatments
  • Vigor enhancement
  • Nematode control
  • Resistance management – new classes of insecticides for seed treatments
pest monitoring
Pest Monitoring
  • Armyworm
  • Black Cutworm
  • ECB and SWCB
  • Corn earworm
  • Fall Armyworm
overwintering swcb survival
Overwintering SWCB Survival

Caldwell, Henderson, Davies, Hardin Counties

Four fields/county

summary of european corn borer fall surveys university of illinois extension 1943 2007
Summary of European Corn Borer Fall Surveys,University of Illinois Extension1943-2007

Kevin Steffey: Univ of IL

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