Blended Refuge Versus Block Refuge
Corn Insects and Crop Genetics Research
2013 Annual Report
1a.Objectives (from AD-416):
1) Determine how fall armyworm (FAW) injury to blended refuge plants will compare to injury on plants in a separate, pure stand refuge planting;.
2)Determine if the injury to triple lepidopteran Bacillus thuringiensis (Bt) (MIR162 x HXX x MON810) plants adjacent to blended refuge plants will significantly change compared to injury to MIR162 x HXX x MON810 plants in a separate, pure stand planting;.
3)Determine field-scale efficacy ratings for FAW to characterize the overall field performance of MIR162 x HXX x MON810 when a low percentage of refuge plants are deployed in the field as a seed blend.
1b.Approach (from AD-416):
This protocol utilizes small plot replicated trials to evaluate the efficacy of triple lepidopteran product (MIR162 x HXX x MON810) against fall armyworm (FAW) when refuge plants are deployed as a seed blend. Data from these trials will be used to calculate weighted FAW efficacy scores to assess the overall field-scale efficacy of the triple lep product concept against fall armyworm.
Progress was made to determine early and late instar movement of fall armyworm from infested maize plant to neighboring plants when refuge is deployed as a seed blend compared to pure stand maize plants. The maize was planted into small replicated plots. The experiment was completed and the report was provided to the cooperator.