稻纵卷叶螟是水稻新上升的主要害虫,大发生的频率高,为害重。及时而准确地测报其发生期是十分必要的。但因稻纵卷叶螟属迁飞性害虫,每年迁入的峰次和时间的迟早常受多种因素影响而多变,具有突发性和多峰次发生的特点,以致田间虫情复杂,种群发育进度参差不齐,与定居性害虫显然不同,增加了常规预测的难度,极需增加新的测报手段。同一种昆虫在不同生态条件下的发育起点(C)和有效积温(K),常因地理种群的不 Rice leaf roller is a new rice pest rise, the frequency of occurrence of large, heavy damage. Timely and accurate measurement of its occurrence is very necessary. However, due to the transfer of rice stem borers fly flying pests, the peak times and times of immigration each year often affected by many factors and changeable, with sudden and multi-peak occurrence characteristics, resulting in complex insects in the field , The development of the population is uneven, and apparently different from the settled pests, which increases the difficulty of routine prediction, and it is very necessary to add new means of measurement. The developmental threshold (C) and effective accumulated temperature (K) of the same insect under different ecological conditions, often due to geographical populations