Abstract
Seasonality of various insect pests of soybean and mungbean was studied by planting the host plants once every 2 weeks over 6 years. The bean fly, Ophiomyia phaseoli (Tryon), and two other agromyzids, Melanagromyza sojae (Zehntner) and O. centrosematis de Meijere, although they occur throughout the year, only cause severe damage during the fall season. The southern green stink bug, Nezara viridula (L.), infests soybean and mungbean between May and October; Anomala cupripes Hope and A. expansa Bates, occur from mid-April through October; and limabean podborer, Etiella zinckenella (Treitschke), remains active between September and May, Aphis glycines Matsumura infests soybeans mainly during October through March, the cooler time of the year.
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