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棉红铃虫第三代是全年发生量最大、危害最严重的一代。红铃虫产卵隐芘,幼虫进入迅速,一般采用化学防治方法控制其危害。能否搞生物防治,它的效果又如何?为了摸索这方面的经验,我们在1976年试验的基础上,1977年在我场二队、五队及农科站共1,330亩棉田里,对第三代红铃虫进行了防治效果比较试验。试验棉田8月底前采用以“7216”为主的生物防治,转入9月份防治第三代红铃虫期间,采取了三种防治方法:①继续坚持生物防治到底;②以生物防治为主,辅之以少量化学农药;③改生物防
The third generation of cotton bollworm is the largest and most endangered generation throughout the year. Red bollworm spawning hermit pyrene, larvae into the rapid, the general use of chemical control methods to control their harm. In order to explore the experience in this field, on the basis of the experiment in 1976, in 1977, in a total of 1,330 mu of cotton fields in the Second Team, the Fifth Team and the Agricultural Station in our field, Three generations of pink bollworm prevention and control of the comparative test. Before the end of August, the test cotton field adopted “7216” -based biological control. During the period of September, the third generation of red bollworm was taken and three control methods were adopted: ① continue to adhere to biological control in the end; ② mainly take biological control, Supplemented by a small amount of chemical pesticides; change biological prevention