David Owens, Extension Entomologist, owensd@udel.edu Soybean Japanese beetle and Asiatic Garden beetle are active, as are the remaining usual defoliators. Dectes stem borer is beginning to emerge out of the soil; emergence typically peaks around mid-July. I have seen it… Continue Reading
David Owens, Extension Entomologist, owensd@udel.edu Corn Begin scouting for Japanese beetle defoliation and for brown stink bugs. NCSU thresholds for stink bugs are 10 or more bugs per 100 plants at V14-VT. Please note that stink bug thresholds more than… Continue Reading
David Owens, Extension Entomologist, owensd@udel.edu Alfalfa Potato leafhopper are present in alfalfa. Cutting alfalfa will destroy nymphs, but adults will leave fields for nearby hosts. Take 10 sweeps in 10 locations. If alfalfa is at 60% bud or flowering, harvest… Continue Reading
David Owens, Extension Entomologist, owensd@udel.edu Melons Cucumber beetles are working their way out, spider mites are working their way in. Scout crown leaves, particularly near field edges. Recommended thresholds are 20-30% of crowns infested with 1-2 mites per leaf. In… Continue Reading
David Owens, Extension Entomologist, owensd@udel.edu Alfalfa Scout alfalfa for potato leafhopper. Our Insect management guide has a dynamic threshold table incorporated, accounting for plant size and value of hay, and control cost. If your fields are experiencing drought stress, it… Continue Reading
