胚轴切断法诱导棉株对棉铃虫生长发育的影响  

Effect of plumular axis-cutted cotton on growth and development of cotton bollworm.

作　　者：李萍[1] 张青文[1] 蔡青年[1] 

机构地区：[1]中国农业大学昆虫系,北京100094

出　　处：《应用生态学报》2000年第3期425-427,共3页Chinese Journal of Applied Ecology

基　　金：国家攀登计划资助项目!(95 31 0 1 0 3)

摘　　要：通过室内饲喂棉铃虫的方法 ,测定了诱导棉株对棉铃虫幼虫发育历期、幼虫体重和蛹重的影响 ,结果表明 ,不加菌处理和加菌处理的诱导抗性棉株可分别使棉铃虫幼虫发育历期延长 0 .5和 3d ,幼虫体重 ( 5龄 )降低 11.45 %和 19.60 % ,蛹重降低 6.5 4%和 10 .81% .用诱导棉株叶片饲养 8日龄棉铃虫幼虫 3天后 ,菌诱导和无菌诱导分别使棉铃虫的相对生长率降低 2 2 .9%和 17.2 % ,相对取食量降低 2 6.1%和 2 1.4% ,说明胚轴切断法可以诱导棉花产生对棉铃虫的抗性 ,通过阻碍棉铃虫的取食和消化 ,影响其生长发育速率 .同时结合假单胞菌 (PseudomonasgladioliD 2 2 5 1)处理 ,可以明显增加抗虫性 .The method of plumular axis cutting was used to induce the resistance of cotton plants to cotton bollworms( Heliothis armigera). The bollworm was cultured in the laboratory, and the effect of induced cotton on the duration of larval development and weights of larvae and pupae was studied.In the treatments of infection and control,the lengths of larval period were delayed by 3 days and 0\^5 days,the weights of larvae were decreased by 19\^60% and 11\^45%,and the pupae weights were decreased by 10\^81% and 6\^54%,respectively.After the 8 days old larvae were reared with induced cotton leaves for 3 days,the infected and uninfected cutted plants resulted in a decrease of the relative growth rates of larvae by 22\^9% and 17\^2% respectively,and in a decrease of the relative feeding rates by 26\^1% and 21\^4% respectively.It is suggested that plumular axis cutting could induce the resistance of cotton plants to bollworm,and influence the growth and development speed of bollworms through retarding their feeding and digestion.Combining with the treatment of Pseudomona gladioli D 2251 strain could obviously increase the insect resistance of cotton plants.

关 键 词：诱导抗虫性 胚轴切断法 棉花 棉铃虫 生长发育 

分 类 号：S435.622.3[农业科学—农业昆虫与害虫防治]