金银花尺蠖发育起点温度和有效积温的研究

利用光照培养箱,在16、19、22、25、28、31和34℃7个恒温条件下饲养金银花尺蠖Heterolocha jinyinhuaphaga Chu,对其各虫态的发育历期、发育起点温度和有效积温进行了研究。结果表明,该虫在16～34℃的温度范围内均能正常生长发育,但各虫态的发育历期随温度变化而变化,在31℃以下的温度时,发育历期随温度的升高而缩短,超过31℃时,发育速度反而减慢,发育历期则逐渐延长;卵、幼虫、蛹、产卵前期和整个世代的发育起点温度分别为9.42、11.44、5.42、13.98和9.74℃,有效积温分别为122.64、303.15、195.95、39.15和673.03日.度;根据有效积温法则预测该虫在滁州市1年的理论发生代数为3.07代,这与实际发生情况基本相符合。

Developmental threshold temperature and effective accumulative temperature of Heterolocha jinyinhuaphaga

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.