1978～1979年,我们在上海县七一公社进行棉田玉米螟防治试验,现将结果报导如下。一、试验方法1.采用三因素三水平的正交试验法,选用 L_9(3~4)表设计方案。另设六个空白对照(表1)。79年在78年基础上改用25%西维因粉剂、敌百虫—稻瘟净混合乳剂、2.5%溴氰菊脂乳剂。 From 1978 to 1979, we conducted a cotton field corn borer control trial at the 71st commune, Shanghai. The results are reported below. First, the test method 1 using three factors and three levels of orthogonal test method, the choice of L_9 (3 ~ 4) table design. Another six blank control (Table 1). 79 years to 78% on the basis of the switch to the use of 25% of the Westwestern powder, trichlorfon - rice blast net mixed emulsion, 2.5% deltamethrin emulsion.