Risks and Benefits of Managing Corn Rootworm Populations
Situation: The risk-benefit picture for corn rootworm management has changed tremendously over the last 20 years for three reasons. First, improved production practices and corn genetics have greatly increased yields, but are also highly favorable to corn rootworms. Second, the development of rootworm resistance to crop rotation has accentuated the production risks from northern corn rootworm. Third, rootworm-resistant corn offers an unprecedented tool for managing corn rootworms, but its not as effective as Bt corn for corn borer. Farmers have more riding on their corn rootworm management decisions than ever. Unfortunately the last research examining the relationship between corn rootworms, lodging and corn yield is over 25 years old.
What is the current risk picture for Minnesota corn growers? Under current production practices and rootworm risk, what benefits can growers expect corn rootworm management?
Expected Outcomes:
- Improve understanding of injury, lodging and yield / harvest loss from CRW under current production situations;
- Design improved scouting strategies for continuous and rotated corn;
- Develop new thresholds reflecting Bt-RW corn, contemporary production practices and current CRW risk
- Generate a risk picture for Minnesota that combines the CRW survey data and this loss-benefit information
Funding and Logistical Support:
This research is funded by the Minnesota Corn Research and Promotion Council and the MN Legislative Rapid Agricultural Response Fund . This project will not be possible without logistical support of the seed companies, the cooperation of corn growers, and the participation of a wide variety of agricultural professionals, such as seed dealers, agronomists, crop consultants, and extension educators.
|
