杨黄褐锉叶蜂蛹发育起点温度和有效积温

The threshold temperature and effective accumulated temperature of pupa of Pristiphora conjugata

在18-34℃范围内的5个温度下，对杨黄褐锉叶蜂蛹发育起点温度和有效积温进行了研究。结果表明，杨黄褐锉叶蜂蛹在18、22、26℃和30℃4个温度下可正常生长发育，而在34℃条件下不能完成发育；杨黄褐锉叶蜂蛹发育起点温度为5．7℃，有效积温为360．9日·度；越冬后蛹发育历期预测式为N=（360．9-K0）／（T-5．7）。

The threshold temperature and effective accumulated temperature of pupa of Pristiphora conjugata were stud- ied under five constant temperatures in the range of 18- 34 ℃. The results showed that pupa of P. conjugata could nor- mally develop at 18, 22, 26 ℃and 30 ℃ ;but it could not complete development at 34℃. The developmental threshold temperature and effective accumulated temperature was 5.7 ℃ and 360.9 degree-day, respectively. After wintering, the ouoa oredictive develooment duration was N=（360.9- K0 ） / （T-5.7）.