With the cool spring, alfalfa weevil larvae development has been slow. However, the larvae has been confirmed in South Dakota. WinField United Forage and Alfalfa Specialist Jeff Jackson says damage can vary by location. “Most years, if you’re south of Interstate I-90, you should probably do an insecticide treatment to protect your first cutting. North of Interstate I-90, you really have to be careful and make a judgment call before your first cut.”
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