David Owens, Extension Entomologist, owensd@udel.edu Alfalfa Begin scouting for potato leafhopper. There’s an excellent threshold table borrowed from Penn State Extension on the alfalfa insect control sheet: https://www.udel.edu/content/dam/udelImages/canr/pdfs/extension/sustainable-agriculture/pest-management/Insect_Control_in_Alfalfa_-2023.pdf. Thresholds vary tremendously depending on how tall the alfalfa is. Pyrethroids do … Continue reading Agronomic Crop Insect Scouting