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了解降雨量的强度等气象因子对棉铃虫不同卵期的冲刷作用、寻找对雨后防治棉铃虫的适期,提高药剂防治效果,1976、1979两年做一些观察。其结果如下表。
Understand the intensity of rainfall and other meteorological factors on the erosion of cotton bollworm eggs in different stages of looking for the appropriate period after the control of cotton bollworm to improve the effectiveness of agents to control, 1976,1979 to do some observations. The results are as follows.