敌死虫对不同发育阶段烟粉虱的生物活性测定  

Bioassays on D-C Tron to Bemisia tabaci of different developmental stages

作　　者：吴青君[1] 徐宝云[1] 徐维红[1] 张友军[1] 朱国仁[1] 

机构地区：[1]中国农业科学院蔬菜花卉研究所,北京100081

出　　处：《植物保护》2002年第4期11-13,共3页Plant Protection

基　　金：国家"十五"科技攻关资助项目; 北京市科委项目 (95 5 42 3 10 0 )

摘　　要：敌死虫对烟粉虱成虫具有较强的驱避作用 ,99 1%敌死虫 2 0 0、10 0、5 0倍液药后 2h～ 12 0h对黄瓜上烟粉虱的驱避率均在 90 %以上 ,5 0倍液处理药后 3d的驱避率为 98%～ 10 0 %。药剂处理的非洲菊上烟粉虱成虫产卵量显著低于对照。敌死虫对烟粉虱卵具有一定活性 ,致死中量为 10 4 6 8 6mg/kg ;对若虫活性较高 ,对 1、2、3龄若虫的致死中量分别为 16 5 81、199 4 6、2 32 38mg/kg ,稀释倍数分别为 5 976、4 96 8、4 2 6 4倍。The biological activities of D-C Tron, a petroleum-based mineral oil, to Bemisia tabaci of different developmental stages were tested. The results showed that the oil was strongly repellent against adult whiteflies. The repellent rate was over 90% after 2h-120 h at 200, 100 and 50 dilutions on cucumber. And the repellent rate was 98%-100% after 3d at 50 dilution. The adults laid less eggs on sprayed Gerbera jamesonii. The ovicidal activity was relatively low, with LD 50 of 10 468 6 mg/kg. The larvicidal activity against the first, second and third instars was high, and the LD 50 were 165 81, 199 46 and 232 38 mg/kg, respectively at 5976, 4968 and 4264 dilutions.

关 键 词：发育阶段 烟粉虱 生物活性 敌死虫 矿物油 蔬菜害虫 花卉害虫 

分 类 号：S436.3[农业科学—农业昆虫与害虫防治] S436.8[农业科学—植物保护]