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Corn Rootworm Management

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Objectives

  • Determine efficacy and corn yield performance of corn rootworm (CRW) management options in fields with high CRW pressure.
  • Determine if additional CRW control measures such as soil-applied insecticide may provide value with Pioneer® brand Optimum® AcreMax® 1 and Optimum® AcreMax® Xtra integrated refuge products, in which 90% of the seeds include Herculex® Xtra (HXX) insect protection.
  • Compare competitive CRW traits.

Study Description

Locations: 4 continuous corn fields in Nebraska with history
of high CRW pressure (average NIS score in the
non-protected check 1.7 - 2.5)
map
Replications: 1 per location
Factors:  
  CRW Protection Trait:  
Pioneer® Hybrid/Brand¹:  
AM1 (HXX):  P0987AM1™(AM1, LL, RR2)
AMX (HXX):  P1023AMX™(AMX, LL, RR2)
Check (non-CRW):  P0987AM™(AM, LL, RR2)
Competitor Hybrid:  
VT3P-RIB  DK61-88RIB
Insecticide:  
 Capture® LFR®  
 Untreated  
  • Pioneer hybrids/brands all included Poncho® 1250 + VOTiVO® seed treatment.

Results

  • The HXX trait provided superior root pruning and yield protection.
  • The addition of in-furrow insecticide slightly improved AM1 and AMX yield, although was not statistically significant.
  • Yield of VT3P-RIB was significantly reduced when in-furrow insecticide was not used.
  • Yield of the non-CRW check was significantly lower than products with the HXX trait, even when insecticide was used.
  • The untreated non-CRW check and VT3 areas had significant lodging/harvest concerns.

 

ne_corn_yld_chart

Means with the same letter are not significantly different at α = 0.1

¹All Pioneer products are hybrids unless designated with AM1, AM, AMRW, AMX and AMXT, in which case they are brands.
Pioneer® brand products are provided subject to the terms and conditions of purchase which are part of the labeling and purchase documents. 2013 data are based on average of all comparisons made in 4 locations through December 17, 2013. Comparisons are against any number of products of the indicated competitor brand unless otherwise stated. Multi-  year and multi-location is a better predictor of future performance. Do not use these or any other data from a limited number of trials as a significant factor in product selection. Product responses are variable. Contact a Pioneer sales representative for the latest and complete listing of traits and scores for each Pioneer® brand product.

All products are trademarks of their manufacturers.

AM - Optimum® AcreMax® Insect Protection system with YGCB, HX1, LL, RR2. Contains a single-bag integrated refuge solution for above-ground insects. In EPA-designated cotton growing counties, a 20% separate refuge must be planted with Optimum AcreMax products.

AM1 - Optimum® AcreMax® 1 Insect Protection System with an integrated corn rootworm refuge solution includes HXX, LL, RR2. Optimum AcreMax 1 products contain the LibertyLink® gene and can be sprayed with Liberty® herbicide. The required corn borer refuge can be planted up to half a mile away.

AMX - Optimum® AcreMax® Xtra Insect Protection system with YGCB, HXX, LL, RR2. Contains a single-bag integrated refuge solution for above- and below-ground insects. In EPA-designated cotton growing counties, a 20% separate corn borer refuge must be planted with Optimum AcreMax Xtra products.

      
HX1 - Contains the Herculex® I Insect Protection gene which provides protection against European corn borer, southwestern corn borer, black cutworm, fall armyworm, lesser corn stalk borer, southern corn stalk borer, and sugarcane borer; and suppresses corn earworm.
Herculex® I Insect Protection technology by Dow AgroSciences and Pioneer Hi-Bred. Herculex® and the HX logo are registered trademarks of Dow AgroSciences LLC.
Liberty®, LibertyLink® and the Water Droplet Design are trademarks of Bayer.
® Roundup Ready is a registered trademark used under license from Monsanto Company.

  HXX - Herculex® XTRA contains both the Herculex I and Herculex RW genes.
Herculex® XTRA Insect Protection technology by Dow AgroSciences and Pioneer Hi-Bred. Herculex® and the HX logo are registered trademarks of Dow AgroSciences LLC.

Poncho® and VOTiVO® are registered trademarks of Bayer.
  YGCB – The YieldGard® Corn Borer gene offers a high level of resistance to European corn borer, southwestern corn borer and southern cornstalk borer; moderate resistance to corn earworm and common stalk borer; and above average resistance to fall armyworm.
YieldGard®, the YieldGard Corn Borer design and Roundup Ready® are registered trademarks used under license from Monsanto Company.