Developmental threshold temperature and effective accumulative temperature of Heterolocha jinyinhuaphaga
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Key Words：Heterolocha jinyinhuaphaga，feeding method of constant temperature，development duration，developmental threshold Heterolocha jinyinhuaphaga，feeding method of constant temperature，evelopment duration，developmental threshold temperature，effective accumulative temperature
Abstract：The developmental duration,developmental threshold temperature and effective accumulative temperature of Heterolocha jinyinhuaphaga Chu were studied at seven constant temperatures (16,19,22,25,28,31,34 ℃) in an illuminated incubator.The results show that larvae could grow normally within a temperature range of 16-34 ℃,and that their developmental duration became shorter with increasing temperature up to 31 ℃ above which growth slowed and development duration increased.The developmental threshold temperatures of eggs,larvae,pupae,pre-oviposition females and an entire generation were 9.42,11.44,5.42,13.98 and 9.74 ℃ respectively,and their effective accumulative temperatures were 122.64,303.15,195.95,39.15 and 673.03 degree days respectively.According to the effective accumulative temperature law,we predict that this pest will have 3.07 generations annually in Chuzhou,which is in accordance with field observations.