褐稻虱、白背稻虱是我国广大稻区混合为害的主要害虫。对这两种飞虱混合为害的损失率测定,国内外未见报道。为了解决生产实践中两种飞虱混合为害的防治指标和发生程度计算问题,我们于1983至1984年对褐稻虱、白背稻虱混合为害损失率测定进行了研究,结果如下。 试验材料和方法 一、供试品种 郴晚三号(晚稻)、威优40(杂交早稻)、梅六早(早稻)。 Brown planthopper, white back louse is the main pests mixed damage in the vast area of ​​China. The loss rate of the two planthopper mixed damage, no reports at home and abroad. In order to solve the production control of two kinds of planthopper mixed harm prevention and control indicators and the degree of calculation, we from 1983 to 1984 on the brown planthopper, white louse resistance loss of hybrids were studied, the results are as follows. Test materials and methods First, the test varieties Chenyue 3 (late rice), Weiyou 40 (early hybrid rice), Mei Liu early (early rice).