%0 Journal Article
%T Bioactivity of azadirachtin and its field efficiency against Spodoptera litura<br>印楝素乳油对斜纹夜蛾的生物活性及田间防效研究
%A DAI Jianqing~
%A <br>戴建青
%A 黄志伟
%A 杜家纬
%J 应用生态学报
%D 2005
%I 
%X In this paper, the effects of varying concentration azadirachtin on tobacco cutworm Spodoptera litura were investigated in both laboratory and field. The results showed that azadirachtin exhibited a wide range of bioactivities, including anti-feeding, growth inhibition, larval toxicity, and oviposition deterrent. This compound could significantly reduce pupal weight and pupation and eclosion rates. After treated with 12 microl x L(-1) azadirachtin for 5 and 7 days, the third instar larvae only weighted 36.8% and 14.5% of the untreated ones, and their development took approximately 6 days longer, with a 27.79% pupation rate and a 37.23% emergence rate, significantly lower than the control by 85.66% and 82.11%, respectively. Azadirachtin was more efficient for the low instar larva than the old ones. Field experiments confirmed that after 7 days application, azadirachtin could effectively control Spodoptera litura, being more efficient than the chemistry pesticide, 10% Chu-Jin SC.
%K Azadirachtin
%K Spodoptera litura
%K Bioactivity
%K Anti-feeding effect<br>印楝素
%K 斜纹夜蛾
%K 生物活性
%K 拒食作用
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=1BA22926AB28FC4E&yid=2DD7160C83D0ACED&vid=7801E6FC5AE9020C&iid=B31275AF3241DB2D&sid=4814830A427BF9BC&eid=4759DE41370E2E7A&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=15&reference_num=32