在调查三化螟Tryporyza incertules(Walker)冬后死亡率的过程中,为了满足一定的虫量,又不致改变三化螟个体生境(挖稻蔸集中寄存于田间,次年春剥查者),从而影响其冬后死亡率和发育进度的误差,笔者采用了“坐标定点法”。这样,既克服了过去调查取样中的盲目性,又减少了剥稻蔸的工作量。 具体作法是:冬前,即待四代三化螟白穗团定型 In order to investigate the post-winter mortality rate of Tryporyza incertules (Walker), in order to meet certain insect population without changing the individual habitat of Borer (Borehole Dao concentrated in the field, the next spring), Affect the post-winter mortality and development of the error, I used the “fixed-point coordinate method.” In this way, it not only overcomes the blindness in sampling in the past, but also reduces the workload of stripping rice. The specific approach is: before winter, that is, four generations of rice borer white spike shape