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High CRW pressure is often a result of a continuous corn-on-corn rotation. Scouting throughout the entire crop season may identify fields with growing CRW populations. Heavy CRW pressure can develop due to the creation of a “trap crop�? situation that serves to attract and concentrate adult beetles during the egg-laying period. Corn in these areas the following season may be subjected to extensive damage due to CRW feeding. A number of environmental and management-related factors can promote the development of trap crops including the following:
Follow recommended Integrated Pest Management (IPM) practices, including cultural control tactics, scouting, and the appropriate use of pest thresholds for chemical control strategies. Implement BMPs in all fields with the probability of high CRW pressure.
Regardless of which primary control tactic listed above is implemented, growers should adopt the following support activities to maximize success: