In an effort to reduce losses from insect infestation, viruses infecting insects are being studied. Although storage facilities offer protective environments for maximum activity of insect viruses, it is only recently that detailed pathologies have been made of viruses affecting stored-product insects. Thus far, viruses infecting the almond moth, webbing clothes moth, potato tuber moth, and Indian meal moth have been investigated. Nuclear polyhedrosis (NPV), cytoplasmic polyhedrosis (CPV), and granulosis viruses (GV) are involved. The stored-product insect viruses appear to be highly virulent and offer great potential as alternative control agents.