在不同定温下观察了棉铃虫各发育阶段的发育速度，测得其发育始点和有效积温常数。运用测得的这些常数，推测棉铃虫在山东省主要棉区一年发生的代数和发生时期，与实测情况基本相符，在预测其发生期和地理分布时可供参考。 The developmental speed of H. armigera at various developmental stages was observed at different temperatures, and its onset of development and effective accumulated temperature constant were measured. Using these measured constants, it is estimated that the occurrence and occurrence period of cotton bollworm occurred in one year in the main cotton area of ​​Shandong Province are in good agreement with the measured data, and can be used for reference in predicting the occurrence and geographical distribution.