紫茉莉茎提取物的生物活性研究

利用紫茉莉茎提取物对小菜蛾(Plutella xylostellaL.)、菜粉蝶(Pieris rapaeL.)、斜纹夜蛾(Prodenia lituraFabr.)的生物活性进行了测定。结果表明,用茎氯仿提取物处理菜粉蝶卵5 d后,对其具有较强的杀卵作用,校正死亡率达82.76%;氯仿提取物对小菜蛾具有较强的产卵驱避作用,3 d后的驱避率为87.40%;紫茉莉茎石油醚提取物对4龄菜粉蝶幼虫具有较强的触杀活性,在取食3 d后的校正死亡率达85%,取食5 d后的校正死亡率达100%;在取食第3 d与第5 d后,茎氯仿提取物对4龄菜粉蝶幼虫均表现出较强的拒食活性,拒食率分别为96.80%与99.67%。4龄菜粉蝶幼虫在取食氯仿提取物处理的甘蓝叶碟7 d后的毒杀效果为87.50%。

Bioactivity of the Extracts from Stem of Mirabilis jalapa L.

The extracts from stem of Mirabilis jalapa L.are used to determine their bioactivity to Plutella xylostella L.,Pieris rapae L.and Prodenia litura Fabr.The results indicated that the chloroform extract has the strong killing egg effects(82.76% of the corrected mortality after 5d to Pieris rapae L.and drive effects 87.40% of drive rate after 3d to Plutella xylostella L.) The petroleum ether extract has the better contact effect to 4th age larva of Pieris rapae L.and the corrected mortality are up to 85% after 3d and 100% after 5d respectively,the chloroform extract has the strong anti-feeding effect to 4th age larva of Pieris rapae L.and the rates of anti-feeding effect are 96.80% after 3d and 99.67% after 5d respectively,and the chloroform extract has the better toxicity effect to 4th age larva of Pieris rapae L.and the toxicity effect is up to 87.50% after 7d.