褐稻虱Nilaparvata lugens Stl是我区早晚稻的主要害虫。一般年份晚造发生重于早造。但近几年来,该虫在早造的发生频率有所提高,造成很大损失。 近几年随着全国对褐稻虱的生物学特性及迁飞规律研究的深入,对原来褐稻虱的测报方法也应有所改进,特别是中长期预测预报方法,已经不能适用。几年来,我所在区内有关单位的配合下,已初步总结出以褐稻虱的迁入期迟早,迁入量多少为主要依据的预测预报方法。现将研究结果初报如下: Brown planthopper Nilaparvata lugens Stl is the main pest in the morning and evening paddy in our district. The late vintage occurred heavier than the early made. However, in recent years, the frequency of occurrence of this pest has been increased in the early days, causing great losses. In recent years, with the further research on the biological characteristics and migration rules of the brown planthopper, the methods of measuring the original brown planthopper should also be improved, especially the medium and long term forecasting methods, which are no longer applicable. In the past few years, with the coordination of relevant units in our area, the forecasting and forecasting methods based on the early and early arrival of brown planthopper and the amount of relocation have been initially summarized. The results of the first report is as follows: