The beet webworm, Loxostege sticticalis (L.) (Lepidoptera: Crambidae), is an important insect pest that infests crops such as sugar beet, maize, and potato in Asia, Europe, and North America. The ovary grade is a reliable factor that can be used to forecast L. sticticalis outbreaks. However, forecasting outbreaks by dissecting female ovaries is tedious and generally impractical. Better methods for outbreak forecasting need to be developed. Molecular information on ovary transcriptomes potentially provides criteria for ovary grade.