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地老虎是棉花苗期的主要害虫之一,小地老虎占83％,大地老虎占17％。当地大面积育苗棉于立夏移栽,此时棉苗2.6—3.1片真叶,地老虎处于高龄期,食量大、为害重。按常规采用有机磷防治效果欠佳;用呋喃丹基施,棉苗未活棵不利根系吸收,难以发挥药效;采用人工捕杀,补苗花工多,并受苗源影响。解决移栽棉地老虎防治问题,十分迫切。为此,我们在射阳县新坍乡棉麦套种田进行了菊酯类农药防治移栽棉地老虎的试验示范,现将主要经验介绍如下: 1.棉花苗床喷施2.5％敌杀死3000倍药液,棉苗帶药下大田,防治地老虎效果达90.24％。射阳西部棉区5年累计使用40万亩次,不但防效稳定在90％以上,而且每亩节省用工和农药费用3.68元,累计效益达
To the tiger is one of the main pests of cotton seedling, small tiger accounted for 83%, earth tiger accounted for 17%. Local large area nursery cotton in the beginning of summer transplanting, then cotton seedlings 2.6-3.1 true leaves, the tiger in the advanced age, food intake, heavy damage. According to the conventional use of organic phosphorus prevention and control of poor results; with carbofuran-based facilities, cotton seedlings did not live under adverse root absorption, it is difficult to play a pharmacological effect; using manual killing, fill seedlings and more, and by Miao source. To solve the problem of transplanting cotton tiger control, very urgent. For this reason, we carried out experiments on the prevention and control of transplanting tiger in the cotton fields in the cotton planting area of Xinluo County in Sheyang County. The main experience is as follows: 1. The cotton seedbed is sprayed with 2.5% Times liquid, cotton seedlings with medicine field, prevention and control of the tiger effect of up to 90.24%. Sheyang western cotton 5 years cumulative use of 40 million mu times, not only anti-efficiency stability in more than 90%, but also save labor and pesticides per acre 3.68 yuan, the cumulative effect of up to