The chalcidids are parasitoids of Lepidoptera, Diptera, and Coleoptera, and some are hyperparasitoids that attack tachinids or ichneumonids. The clover seed chalcid, Bruchophagus platyptera (Walker), is a serious pest of alfalfa seed and clover. Destruction can exceed 85 percent. The eggs are deposited through the seed pod, and only one larva will develop per seed. Pupation occurs in the seed. Control is especially difficult and involves eliminating light where seed is stored, and synchronizing seed production with periods of low pest activity.