Degree-day and temperature-dependent development of yellowmargined-leaf beetle, Microtheca ochroloma (Coleoptera: Chrysomelidae)

The yellowmargined leaf beetle, Microtheca ochroloma Stål (Chrysomelidae) is the most damaging pest of organic crucifer production in Alabama and other parts of the southern United States. Currently, organic crucifer growers lack monitoring tools necessary for proper targeting of pest management tactics. Therefore, alternative approaches such as pest prediction models are essential for anticipating insect activity and its migration. The goal of this study was to develop a temperature-based pest prediction model that could be used in predicting migration of M. ochroloma into vegetable fields. Laboratory experiments were conducted to determine rates of larval and pupal development and adult activity at constant temperatures ranging from 10 - 35°C. Field experiments were carried out to validate the model.