The study was conducted to develop the full seasonal phenology model of G. molesta in pear orchard. G. molesta is a multi-voltine insect with four to five generations per year depending on temperature, food resources and geographic location. For precise model construction, information on temperature-dependent development and the distribution of developmental completion of overwinteirng and summer G. molesta population was used. The performance of model was based on single cohort population of G. molesta. The validation of model system was performed with the male moth catches in sex pheromone-baited traps of pear orchards in four pear production regions (Anseong, Icheon, Naju and Ulju), three apple production regions (Andong, Chungju and Geochang), and four plum orchards (Uiseong) of Korea in 2010 and 2011, respectively. The observed phenology of seasonal population of G. molesta was explained by our model system. The predicted dates for the cumulative 50% male moth catches per each generation were within seven days variation per each generation. The precise predictive model of G. molesta adult occurrence could help decision making and enhancing control efficacy.

• Jeong Joon Ahn(Plant medicine major, School of bioresource sciences, Andong National University)
• Lalit Prasad Sah(Plant medicine major, School of bioresource sciences, Andong National University)
• Chuleui Jung(Plant medicine major, School of bioresource sciences, Andong National University)