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黄地老虎是棉花苗期的主要害虫。每年都有不同程度的发生,自1970年以来,逐年有加重的趋势。一般年份部分地片发生较重。1973年曾在棉田严重发生,少数地段造成严重缺苗断垄,直接影响棉花生产。 我县从1967年以来,早春在葱花地以糖醋盆诱捕越冬代成虫,供作短期预报的依据,从1972年开始,各测报基点采用此方法捕蛾,不但指导田间查卵、查虫,也能减轻幼虫为害。从诱捕成虫看出,如无特殊气象变化,在一定数量的葱花上诱捕成虫数量越多,当年发生程度越重。如1973年从4月23—5月19日捕蛾,千朵葱花捕蛾1,147头,结果田间落卵每平方米30.6粒,造成大发生。
Yellow tiger is the main pest of cotton seedling. Every year, there are different degrees of occurrence, which have been increasing year by year since 1970. Part of the general year of the film occurred heavier. In 1973 there was a serious occurrence in the cotton field, a small number of lots caused a serious lack of seedlings broken ridge, a direct impact on cotton production. Since 1967, in early spring, all the adults of the overwintering generation have been trapped in sweet and sour pots in spring and spring for the purpose of short-term forecasting. Since 1972, all the newspaper bases have used this method to catch moths, not only guiding the field to find eggs, Can also reduce larval damage. From trapping adults see, without special weather changes, the number of trapped in a certain number of green onion on the number of adults, the more serious the extent of the year. For example, in 1973, from April 23 to May 19, the number of moths caught was 1,147, and the number of sprouts and moths per 1,000 m 2 was 30.6 in the field, causing a great occurrence.