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Field Crop Insect Update Changes in Pest Management

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Field Crop Insect Update Changes in Pest Management Ric Bessin Extension Entomologist University of Kentucky Lexington * October 21, 2008 Presenter: Ric Bessin Field ... – PowerPoint PPT presentation

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Title: Field Crop Insect Update Changes in Pest Management


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
  • Black cutworm
  • European corn borer
  • SW corn borer
  • Fall armyworm
  • Flea beetles
  • Wireworms
  • Corn Rootworm
  • Stink bug
  • Soybean stem borer
  • Armyworms
  • Soybean aphid

4
Bts for Corn Pests
  • YieldGard Corn Borer (Cry1Ab)
  • YieldGard Rootworm (Cry3Bb1)
  • YieldGard Plus (Cry1AbCry3Bb1)
  • Herculex (Cry1F)
  • Herculex RW (Cry34Ab1Cry35Ab1)
  • Herculex Xtra (Cry1FCry34Ab1Cry35Ab1)
  • Agrisure CB (Cry1Ab)
  • Agrisure RW (mCry3A)
  • Agrisure CB/RW (Cry1ABmCry3A)
  • YieldGard VT RW (Cry3Bb1)
  • YieldGard VT Triple (Cry1Ab Cry3Bb1)

5
Insects Controlled by Bt Corn
ECB SWCB BCW FAW CRW
YieldGard CB - -
YieldGard RW - - - -
YieldGard Plus -
Herculex -
Herculex RW - - - -
Herculex Xtra
Agrisure CB - -
Agrisure RW - - - -
Agrisure CB/RW -
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
INDUSTRYS FIRST-EVER, EIGHT-GENE STACKED
OFFERING IN CORN Stacked product combines Dow
AgroSciences and Monsantos 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 industrys 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 5001 susceptible to resistant ratio
  • No more than 80 Bt corn
  • Refuge within ½ mile for CB Bts
  • 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 gt2 yrs
  • Bt CB RW
  • When both of the above is true

11
Yield Benefit by Planting Date, 6-Year Average
Planting Date Non-Bt Tunneling (in) Yield Diff. (bu)
Early Mid April 4/5 4/13 3.5 3.3
Late April 4/17 4/30 4.5 2.3
Early Mid May 5/6 5/13 4.6 6.6
Late May 5/21 5/31 5.7 9.3
Early Mid June 6/5 - 6/14 6.5 20.7
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
WW WG FB SCM BCW CRW
Gaucho - -
Prescribe -
Cruiser Ex Pak -
Cruiser EP CRW
Poncho 250 -
Poncho 1250
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
Year Girdled stalks () Survival/ girdled stalk () SWCB/stalk ()
2007 12.8 1.4 0.18
2006 15.0 31.8 4.82
2005 5.6 5.1 0.29
2004 15.6 2.5 0.39
2003 26.6 4.3 1.13
2002 11.8 5.3 0.63
2001 40.6 9.7 3.92
2000 20.7 26.9 5.57
1999 35.9 10.1 3.64
19
Summary of European Corn Borer Fall
Surveys,University of Illinois
Extension1943-2007
Kevin Steffey Univ of IL
20
(No Transcript)
21
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