Abstract
Various antibiotics and some other compounds were tested as insecticides and chemosterilants on adult female codling moths, Carpocapsa pomonella (L.). These were applied topically to the ventral abdomen or by injection with a microsyringe. Novobiocin was extremely toxic in several tests, killing all the moths treated with dilutions as low as 150 ppm. Egg laying was reduced significantly by a few antibiotics, but most of them had no effect on egg laying or on moth mortality.