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几年来,我县一直把杨树枝把诱蛾和药剂防治相结合,取得了较好的效果。1972—1974年,每年第四代棉铃虫发蛾期间(第四代是我县为害棉花的主要世代)全县64万多亩棉花,插杨树枝把的数量达1200多万把,平均每亩20把左右,从而消灭了大量的棉铃虫蛾子。仅据1972年第四代发蛾期统计,全县诱杀棉铃虫蛾子6000多万头,平均每亩92.9头。 为了进一步明确诱蛾灭卵的作用,1974年第四代棉铃虫发蛾期间,我们做了树枝把诱获棉铃虫雌蛾产卵情况的试验观察。 在第四代棉铃虫发蛾期间(8月25日至9月7
Over the past few years, my county has been the branch of the moths and pesticides combined prevention and treatment, and achieved good results. During 1972-1974, the fourth generation of cotton bollworm (the fourth generation is the main generation of cotton that infest cotton in our county) every year. The county has more than 640,000 mu of cotton and the number of poplar branches inserted reaches more than 12 million, with an average of mu 20 or so, thus eliminating a large number of bollworm moths. According to the statistics of the fourth generation of hair moths in 1972, more than 60 million moths of cotton bollworm were trapped in the county, with an average of 92.9 mou. In order to further clarify the role of moths oviposition, during the fourth generation of Helicoverpa armigera in 1974, we made experimental observations on the spawning of cotton bollworm female moths by twigs. During the fourth generation of Helicoverpa armigera (August 25 to September 7)