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1979年,我们应用残效期较长的杀虫剂——呋喃丹微粒剂,在高粱的心叶前期,用点施器进行心叶点施一次,防治玉米螟兼治高粱蚜,取得较好效果。供试高粱品种191,在7月10日施药,用点施器将药点施于喇叭口内。施药当时,正值一代玉米螟卵盛期及高粱蚜点片发生期。小区面积33平方米,重复三次,随机排列。每小区取三点,定点定植调查。防治一代玉米螟的效果。投药后20天(7
In 1979, we applied carbofuran granules, a pesticide with a longer residual period, to apply leaf spot once with a point applicator to prevent and cure corn borer and sorghum aphid in the early stage of the heart leaf of sorghum and achieved good results. The test sorghum variety 191, administered on July 10, point device will be administered to the trumpet mouth. At the time of spraying, it was the peak of the generation of corn borer eggs and the occurrence of sorghum aphid spots. Community area of 33 square meters, repeated three times, randomly arranged. Take three for each cell, site-specific investigation. Control effect of the first generation of corn borer. 20 days after administration (7