关键词: 桃小食心虫, 温度, 短时高温处理, 生长发育, 存活率, 繁殖

Abstract: 【Aim】 The peach fruit moth, Carposina sasakii Matsumura, is one of the most damaging pests in apple orchards in North China. We explored the influence of brief exposure to high temperature on the development and reproduction of the pest. 【Methods】 The developmental duration and survival rate of each life stage and fecundity were measured in the laboratory under the conditions of temperature 23±1℃, RH 80%±7%, and photoperiod 15L∶9D, after the eggs, larvae, pupae, and adults were exposed to high temperatures of 35, 38, and 41℃ for 1-4 h. 【Results】 High temperature had no significant effect on the hatchability of eggs. The larval duration significantly prolonged and the survival rate significantly decreased in 1-day-old larvae exposed to 41℃, while no significant effect was found on 3-day-old or over 3-day-old larvae exposed to 41℃. The emergence rates decreased and the deformity rates increased significantly in 11-day-old pupae exposed to 38 and 41℃. The longevity shortened and the survival rates and fecundity decreased significantly in female adults exposed to 38 and 41℃. 【Conclusion】  Brief exposure of C. sasakii to high temperature imposes less effect on its egg than on its adult. The results could improve our understanding of the mechanisms responsible for population dynamics of C. sasakii during high temperature season.  

Key words: Carposina sasakii, temperature, brief exposure to high temperature, growth and development, survival rate, reproduction