论文部分内容阅读
报道了苦槛蓝抽提物对菜粉蝶幼虫拒食、毒杀和影响生长发育作用的生物活性．试验表明，ρ＝10g／L的苦槛蓝叶、茎浸提物对莱粉蝶3龄幼虫的非选择性拒食率均在90％以上，对4龄和5龄幼虫的拒食率分别为80％～86％和46％～65％．Pottr喷雾处理72h后，ρ＝10g／L叶甲醇浸提物对3龄幼虫的校正死亡率可达86．1％，而ρ＝10g／L叶石油醚浸提物对4龄幼虫的校正死亡率则为88．5％．用苦槛蓝叶氯仿和甲醇萃取物处理4龄试虫72h后，LC50分别是ρ＝6．3g／L和13．9g／L．ρ＝10g／L苦槛蓝叶氯仿萃取物处理菜粉蝶5龄幼虫4d后，试虫平均体重为对照的38．05％，羽化率4．00％，发育抑制率达86．15％．
It reports the antifeedant, toxic killing and biological effects of the extract of Bittern blue on the cabbage butterfly larvae. The results showed that the non-selective antifeedant rate of blue leaf and stem extracts of ridges with the threshold of ρ = 10g / L was above 90% for 3rd instar larvae of Laodendron, and the antifeedant rates to 4th and 5th instar larvae were 80% ~ 86% and 46% ~ 65%. After Pottr spraying for 72h, the corrected mortality of 3rd instar larvae of ρ = 10g / L was up to 86.1%, while the corrected mortality of 4th instar larvae of ρ = 10g / L leaves petroleum ether extract The rate is 88.5%. The LC50 of the 4th instar larvae after treatment with chloroform and methanol extract of blue-eyed blue leaf leaf leaf for 48h were ρ = 6.3g / L and 13.9g / L, respectively. ρ = 10g / L After the 4th instar larvae of Pieris rapae were treated with the chloroform extract of blue-leaf threshold, the average body weight of test insects was 38.05% of the control, the emergence rate was 4.00% and the development inhibition rate was 86.15%.