论文部分内容阅读
红铃虫第一代卵集中出现在棉花蕾期,幼虫蛀食棉蕾。被害棉蕾除极少数在开花以前脱落外,大多数都在开花期表现为“虫害花”。一般情况下,“虫害花”在开花后三、五天内形成幼铃脱落,能够成铃的很少。因此以往人们认为必须狠抓红铃虫第一代的防治,保蕾保花,才能夺取棉花高产。据统计,荆州棉区常年防治一代红铃虫的面积近百万亩,约占棉田总面积的20—30%,有些地方在“虫害花”出现后,还采取挑虫花、捉幼虫、向花心注射
The first generation eggs of pink bollworm appear in cotton bud stage, and the larvae eat cotton buds. Except for a very small number of cotton buds shed before shedding flowering, most of them show “pest blossoms” at the flowering stage. Under normal circumstances, “pest flower” in the flowering three or five days after the formation of young bell off, can be very few bells. Therefore, in the past people think that we must pay close attention to the first generation of red bollworm prevention and control, Paul Lei Paul, to seize the cotton yield. According to statistics, there are nearly one million mu of pest insects in Jingzhou cotton area, accounting for 20-30% of the total area of cotton fields. In some places, pest insects, Flower heart injection