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中华草蛉(又名草青蛉,属脉翅目草蛉科),幼虫能扑食多种棉虫,是棉花害虫的天敌。为了探索中华草蛉防治棉花害虫的放蛉适期和放蛉量,1979年我们进行了防治棉花害虫试验。 防治蚜虫试验:设齐苗、一片真叶、二片真叶开始放蛉三个处理,以药剂防治为对照。每处理面积0.1亩,放蛉总量以每亩3万条幼虫计。同时,还根据蚜虫的虫口密度,以蚜虫与草蛉数量比,设10:1、20:1、30:1、50:1四个处理,以不打药不放蛉为对照。每处理面积0.1亩,放蛉3次。放蛉方法:在每次放龄前一天,将变黑快
Chinese weed (also known as grass Qingrou, belongs to the order of the division of the order), larvae can prey on a variety of cotton insects, is the natural enemy of cotton pests. In order to explore the prevention and control of cotton weeds in China, the timing and release of cotton pests, cotton weeds in 1979 we tested. Control aphids test: Supplied Qi Miao, a true leaf, two true leaf release 蛉 three treatment, with drug control as a control. Each treatment area of 0.1 acres, put the total amount of 30,000 larvae per meter. At the same time, according to the aphid population density, with the number of aphids and grass mulberry than the number of 10: 1,20: 1,30: 1, 50: 1 four treatment, not to fight drugs do not let go as control. Each treatment area of 0.1 acres, put 蛉 3 times. Put 蛉 method: one day before each age, will be black fast