Cole Crops Continue scouting young broccoli, cabbage, and napa cabbage for worms and for flea beetles. The threshold for young plants is a 20% infestation. When plants are young and when caterpillars are young, Bt. should provide excellent control. Flea… Continue Reading
David Owens, Extension Entomologist, owensd@udel.edu Moth counts are increasing. Most recent vial tests indicate a 32% survival rate following a pyrethroid challenge. The good news is that this is slightly lower than some years. In August we have tested 168… Continue Reading
David Owens, Extension Entomologist, owensd@udel.edu Spinach and Beets Beet webworm activity is unusually high this year. In Georgetown, they have stripped a lot of foliage off pigweeds. In addition, beet armyworm activity is also getting into oddball places, just like… Continue Reading
David Owens, Extension Entomologist; owensd@udel.edu Diamond back moth numbers have been elevated this season. Larvae are small, smooth, green, often hold their anal prolegs out in a V-shape and wiggle violently when disturbed. Imported cabbageworm on the other hand is… Continue Reading
