Field Performance of WideStrike Insect Protection Against Key Lepidopteran Pests in the Mid-South And Southeastern U.S. M. Willrich Siebert, L. B. Braxton,

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Presentation transcript:

Field Performance of WideStrike Insect Protection Against Key Lepidopteran Pests in the Mid-South And Southeastern U.S. M. Willrich Siebert, L. B. Braxton, R. M. Huckaba, L.C. Walton, R.A. Haygood, R.B. Lassiter, F. Haile, and G. D. Thompson * Dow AgroSciences LLC., Indianapolis, IN TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC. TM

Heliothine Complex In Cotton Bollworm, Helicoverpa zea Tobacco Budworm, Heliothis virescens Mid-south and southeastern U.S Cotton Insect Loss Estimates: - Yield Reduction: 1.2% (10 states, 1 to 2.5%) - Applications/Acre: 0.8 (0.2 to 1.5) TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

Secondary Lepidopteran Pests In Cotton 2005 Applications per acre: <1 Fall armyworm: Greatest losses among secondary Lepidoptera Fall Armyworm, Beet Armyworm, Southern ArmywormSoybean Looper/Cabbage Looper TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

Cry 1Ac Cry 1F + WideStrike : A Dual-Gene Bt Technology For Broad Spectrum Lepidopteran Management Commercially Available In PhytoGen Varieties Since 2005 TM TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

WideStrike TM reduced feeding damage by tobacco budworm and bollworm to low levels. Cry1Ac is highly effective against tobacco budworm. WideStrike TM sustained low-level damage under high bollworm pressure WideStrike TM non-sprayed yields were numerically similar if not statistically greater than the sprayed non-Bt in natural infestation tests. WideStrike TM provided excellent control of many of the secondary foliar feeding lepidopterous insects including cabbage looper, soybean looper, southern armyworm, and fall armyworm. Historical Background: TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

Materials And Methods l WideStrike Evaluated in 23 Locations During No Insecticide Sprays Targeting Lepidopteran Pests - Natural Infestations l Experimental Design: Randomized Complete Block, 4 replications l Variables Measured: Heliothine Damage And Live Larvae, and Lint Yield l Statistical Analysis: ANOVA, α = 0.10 TM TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

WideStrike Trial Locations: 2006 * High * Moderate * Low Heliothine Infestations * * * * * * * * ** * * * * * * * * * * * * * TM TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

8 Aug PHY370WRPHY485WRFPHY310RPHY425RF 8 Aug 15 Aug 24 Aug Square Damage Boll Damage Efficacy of WideStrike Against Bollworm, Rocky Mount, NC, Dr. J.R. Bradley, NCSU Columns within a date followed by the same letter are not significantly different, P>0.10 b b b b b b b b a a a a a a a a TM TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

Performance of WideStrike Against Bollworm, East Bernard, TX, Gregory Visoski Consulting Entomologist 2 July PHY370WRPHY485WRFPHY310RPHY425RF 2 July 12 July 7 Aug Square Damage Boll Damage Columns within a date followed by the same letter are not significantly different, P>0.10 PHY470WRPHY480WR a a a a a a a a b b b bTM TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

b b ab a b c c Yield of WideStrike Varieties Exposed to High Bollworm Pressure, East Bernard, TX, Gregory Visoski Consulting Entomologist Columns within a date followed by the same letter are not significantly different, P>0.10 PHY370WRPHY485WRFPHY310RPHY425RFPHY470WRPHY480WRTM TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

Performance of WideStrike Against Bollworm, Bossier City, LA, Steve Micinski, LSU AgCenter Columns within a date followed by the same letter are not significantly different, P>0.10 PHY370WRPHY485WRFPHY310RPHY425RFPHY470WRPHY480WR 11 July 18 July 0 0 a a a a a 25 July 1 Aug a a a b bbbTM TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

a b a a a b b Columns within a date followed by the same letter are not significantly different, P>0.10 PHY370WRPHY485WRFPHY310RPHY425RFPHY470WRPHY480WR Yields of WideStrike Varieties Exposed To Sustained Bollworm Infestations, Bossier City, LA Steve Micinski, LSU AgCenter TM TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

Square Damage (%)Boll Damage (%) 26 Jul2 Aug 9 Aug 23 Aug30 Aug 26 Jul2 Aug 9 Aug 23 Aug30 Aug *Fall armyworm infestations occurred from 9-30 Aug. PHY370WR PHY485WRFPHY310RPHY425RF Efficacy of WideStrike Against Mixed Bollworm and Fall Armyworm Infestations, Lonoke, AR Dr. Merritt Holman, Arkansas Crop Technology TM TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

9 Aug *Number per 40 bolls sampled per date. 23 Aug 30 Aug PHY370WRPHY485WRFPHY310RPHY425RF WideStrike Provides Excellent Control Of Fall Armyworm, Lonoke, AR Dr. Merritt Holman, Arkansas Crop Technology TM TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

b a a b c c Columns within a date followed by the same letter are not significantly different, P>0.10 Yields of WideStrike Varieties Exposed To Sustained Bollworm and Fall Armyworm Infestations, Lonoke, AR PHY370WRPHY485WRFPHY310RPHY425RF Dr. Merritt Holman, Arkansas Crop Technology TM TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

Efficacy of WideStrike Against High-Level Soybean Looper Infestations, Tillar, AR Dr. Charlie Guy, G&H Associates, Inc. a a b b Columns within a date followed by the same letter are not significantly different, P>0.10 TM TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

Conclusions l Efficacy of WideStrike ™ cotton against Heliothines in 2006 similar to results. l Varieties containing WideStrike provided control of Heliothis (primarily bollworm) that were statistically similar. - Boll damage exceeded 5% at four of 23 locations, all under heavy BW pressure. - Under high insect occurrence, a few locations exceeded insect threshold levels of feeding damage or larval infestation in Widestrike ™ cotton – treatment necessary to prevent losses from bollworm. TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

Conclusions l Varieties containing WideStrike provided control of secondary lepidopteran pests that were statistically similar. l WideStrike effectively protected against yield loss. –Numerical and even statistic differences did occur among WideStrike varieties in one location. Yield potential and environmental conditions are likely contributing factors, rather than in-season differences in efficacy. TM TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.

WideStrike Insect Protection: Delivery of Two Insect Control Genes l Excellent Efficacy Against Heliothines l Control Of Key Secondary Lepidopteran Pests l Overall Reduction In Lepidopteran Sprays l Expressed In High Yielding PhytoGen Varieties TM TM Trademark of Dow AgroSciences LLC. TM PhytoGen and the PhytoGen Logo are trademarks of PhytoGen Seed Company LLC.