Threshold temperature and effective accumulated temperature of peach fruit borer, Carposina sasakii.

The peach fruit borer,Carposina sasakii Matsumura,is one of the most damaging pests in apple orchards in Northeast Asia.In this paper,the developmental period,developmental threshold temperature and effective accumulated temperature of different life stages of C.sasakii were determined in the laboratory under the conditions of 17、20、23、26、29℃ 、80% ± 7% RH and a photoperiod of L:D = 15:9(Light:Dark).The results indicated that the developmental periods of the life stages of this pest decreased in length with increasing temperature.The developmental threshold temperature of eggs,larvae,pre-pupae,pupae and pre-oviposition are estimated to be 10.02,9.44,10.58,10.09 and 9.51℃ respectively,and their effective accumulated temperature was 87.3,238.6,10.7,156.9 and 31.6 degree days respectively.The developmental threshold temperature and effective accumulated temperature for an entire generation is 9.22℃ and 543.2 degree days.