According to SDSU’s latest pest and crop report, corn rootworm adults are active in South Dakota. High winds from recent storms caused lodging which could be partially due to corn rootworm. Scouting is necessary to confirm and stay ahead of insect pressure. Sunflower moths have also been observed in South Dakota. Sunflowers are most susceptible to the moth caterpillars from the onset of flowering to when the ray petals begin drying. These moths migrate from the south. The threshold for sunflower moths is one-to-two moths per five sunflower heads.
