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Q&A ViewAttendees 2

Plant-Insect Ecosystems

10-Minute Paper

P-IE: IPM - Field Crops

Effect of rye cover crop termination timing on arthropods in soybean

Tuesday, November 2, 2021
2:06 PM – 2:18 PM MT
Location: Colorado Convention Center, Meeting Room 102-106
In-Person
The adoption of cover crops (CC) has been steadily increasing throughout the U.S., providing many growers with potential benefits in their cropping system. However, there is little information on how cover crops may influence pest pressure or other arthropods in the transition to a soybean cash crop. This multi-state project was conducted from 2018-2021 throughout the midwestern region, but this presentation will primarily focus on the multiple sites in eastern Nebraska. The objective of this study was to evaluate the effects of rye termination timing relative to soybean planting on arthropods in a CC to soybean system. Plots were designed as a randomized complete block design with a no CC control and three CC termination timings (12-14 days before planting, at planting, and 5 days post planting). At each termination CC biomass, extended leaf heights, and weed biomass were taken. Insect counts, damage assessments, soybean biomass, and pitfall traps were taken at V1/V2 stage soybeans. The weight of dry biomass taken ranged from 200-5000 lbs/acre, with the first termination having significantly less biomass than the other timings. Arthropod activity in pitfall traps differed between treatments at select sites, with very little pest pressure was observed at most sites. No yield differences were observed among treatments, suggesting a low probability of soybean yield loss occurring due to CC. Results of this project contribute to the understanding of the overall effects implementing CC in a soybean system.