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据《中国棉花》报道,棉花苗期棉蚜多聚集棉苗顶心危害的特性,将药液点于顶心上,具有施药量少可控制蚜害的效应。 一、使用药剂及方法 1984年在棉花苗蚜繁殖高峰期选用50％甲胺磷70倍液;40％氧化乐果、2.5％敌杀死各100倍液;3％呋哺丹颗粒剂10倍液;用50％甲胺磷1000倍液喷雾作对照。1985年将敌杀死改为20％杀灭菊脂,其他仍与1984年相同。将配好的药液用小毛笔点滴在棉苗顶心上,每株1滴,每斤药液点8000—10000苗。 二、防治效果 1984年使用效果:最佳的是2.5％敌杀死100倍液,药后10天有蚜株降低97.1％,药后15天有蚜株降低92.75％,
According to the report of China Cotton, cotton aphid accumulates cotton seedlings at the top center of the heart of the harm of the characteristics of the liquid point in the top of the heart, with a small amount of pesticides can control the effect of aphids. First, the use of agents and methods In 1984 the peak of cotton seedling aphids selection of 50% methamidophos 70 times 40% omethoate, 2.5% of the enemy kill each 100 times the liquid; 3% furunban granules 10 times Liquid; spray with 50% methamidophos 1000 times for the control. In 1985, the enemy’s death was changed to 20% to kill daisy, while the rest remained the same as in 1984. With a good solution with a small brush drip in the top of the cotton seedling heart, a drop of each plant, catty liquid point 8000-10000 seedlings. Second, the control effect of the 1984 effect: the best is 2.5% of the enemy killed 100 times the drug 10 days after the aphid strains reduced 97.1%, 15 days after treatment, aphid strains reduced 92.75%