Voltinism could be used as an index assessing the global warming effects on insect phenology. In many cases, however, the voltinism could not be defined explicitly as a numerical scale especially when it should be calculated over the various climatic conditions. In addition, calculation of insect voltinism is much difficult when only a small portion of its population emerge as adults in the late season. In this study, a degreeday model, a simplified phenology model and a population model for the peach fruit moth, Carposina sasakii, were used to predict their voltinism. To evaluate the model performance, we assumed a continuously host providing system. Daily maximum and minimum temperatures in Suwon in 2015, and 2℃ increase in the daily maximum and minimum temperatures were used to describe current and future climate conditions, respectively. The merits and limits for three models for evaluating insect voltinism are discussed.

• Hyoseok Lee(Division of Forest Insect Pests and Disease, National Institute of Forest Science)
• Jong-Kook Jung(Division of Forest Insect Pests and Disease, National Institute of Forest Science)
• Sang-Hyun Koh(Division of Forest Insect Pests and Disease, National Institute of Forest Science)
• Joon-Ho Lee(Research Institute of Agriculture and Life Science, Seoul National University, Entomology Program, Department of Agricultural Biotechnology, Seoul National University)