摘要
１９９５～１９９７年就转Ｂｔ基因抗虫棉对棉铃虫的抗性及棉铃虫的防治技术进行了研究。结果表明，抗虫棉对棉铃虫具有很强的内在抗性，对初孵幼虫致死率达９０％以上，对幼虫的生长发育影响严重，其毒力随幼虫龄期的增大而降低。在棉铃虫大发生年份，对二、三代棉铃虫不进行药剂防治则显著减产。初步提出抗虫棉的棉铃虫防治策略为：二代以保棉株生长点为主，三代要重点防治以保蕾铃。其防治指标是：二代棉铃虫百株累计卵量２００～３００粒，三代百株累计卵量８０～１２０粒。
From 1995 to 1997,the study on the resistance to Helicoverpa armigera of Bt transgenic cotton and the control techniques showed that Bt transgenic cotton has very high inherent resistance to cotton bollworm,the lethal ratio to bollworm neonate is above 90%,having serious influence to larvas development.The influence declines as the bollworm develops.Without any chemical control during the second or third generation of cotton bollworm when outbreak,the lint yield of the Bt transgenic cotton will significantly decrease.The proper index and techniques to control cotton bollworm were suggested.
出处
《山东农业科学》
1998年第3期13-16,共4页
Shandong Agricultural Sciences
基金
山东省农科院下达课题
关键词
转BT基因
抗虫棉
棉铃虫
抗性
防治指标
Bt transgenic cotton,Helicoverpa armigera,control techniques
