October 13, 2020
All southern corn growers are required to plant a non-insect protected corn refuge if growing Bt (Bacillus thuringiensis) corn. The objectives of this trial are to:
- Evaluate the response of refuge (non-Bt) corn products to seeding rate.
- Determine the population that optimizes the yield potential and standability for each refuge corn product.
- Show growers how to optimize the performance of refuge corn products in their corn refuges.
- Encourage improved grower compliance with refuge requirements.
RESEARCH SITE DETAILS
|Soil Type||Mixed Clay, Silt Loam|
23K, 28K, 33K, 38K, 43K
- This demonstration was conducted as a non-replicated large block.
- Four DEKALB® brand Roundup Ready® Corn 2 products were planted at five seeding rates. Emergence was approximately 95% of the planted seeding rate.
- DKC62-05 Brand
- DKC66-94 Brand
- DKC68-24 Brand
- DKC70-25 Brand
- Nitrogen was applied at 240 lb/acre as 32% liquid UAN. All weed control, insect control, and irrigation inputs were applied per local standards.
- All data was collected using Precision Planting® 20/20 SeedSense® via the Climate FieldView™Platform. Average yield data were corrected to 15.5% moisture in the analysis.
UNDERSTANDING THE RESULTS
Figure 1. Response of four refuge corn brands to seeding rate (seeds/acre).
- Three brands in this demonstration, DKC62-05 Brand, DKC66-94 Brand, and DKC68-24 Brand increased average yield as seeding rate increased, except DKC70-25 Brand.
- Refuge corn products tested in this demonstration exhibited acceptable average yields according to expected potential yield.
- For this demonstration, refuge corn products generally produced higher yields at higher seeding rates. Seeding rates should be adjusted according to the production environment.
- Refuge corn product characteristics, yield potential, and agronomic practices are considerations when selecting refuge corn products.
- Contact your DEKALB® brand seed representative for questions about specific corn products and refuge requirements.