白背飞虱是怀化地区水稻上的第一大害虫,一般在四月下旬至六月上旬迁入。每年发生六代,以二、三代在六月中下旬至七月中下旬暴发危害。历年发生面积200多万亩,严重威胁早、中稻的增产丰收。为了进一步找出更好的测报和防治办法,我们对迁飞规律和发生预测,进行了调查和试验研究,结果如下。一、白背飞虱在我区的迁飞规律 White-backed planthopper is the largest pest on rice in Huaihua area, generally moving from late April to early June. Six generations occur each year, with the second and third generation outbreaks in mid to late June and late July. Over 200 million mu have occurred over the years, seriously threatening the yield increase of early rice and middle rice. In order to further find out better methods of forecasting and controlling, we conducted a survey and experimental study on the regularity of migration and the occurrence of the forecast. The results are as follows. First, the white-backed planthopper in our area of ​​migration rules