NDSU Extension Entomologist Janet Knodel describes the Red Sunflower Seed Weevil as the most severe pest for sunflower growers this past year. “The larvae stage is causing the most damage by feeding on the kernels, usually damaging about one-third of the kernel.” The most recent National Sunflower Survey showed 15 percent of seeds from South Dakota had feeding on them. Five percent of the seeds in North Dakota had signs of feeding. Central South Dakota has confirmed resistance to Asana and Warrior pesticides. “We have this dark cloud on the horizon that’s been here for awhile.”
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