摘要
测定茶枯水及芫花、苦楝、长叶冻绿、苍耳的乙醇抽提物对卫茅尺蠖和菜青虫药效,结果表明,芫花的效果最好,可使取食量下降75%,并又进一步降低羽化率,抽提物10g/L浓度野外有效期在5天以上;次之为苦楝叶。作用途径主要是拒食和胃毒。茶枯水亦有一定作用,它还是植物抽提物的极好湿润剂,对提高药效起重要作用。
Ethanolic extracts from six plants,namely,Camellia oleifera, Daphnegenkwa,Xanthium sibiricum,Tripterygium wilfordii.Rhamnus crenata,and Meliaazedarach,were separately applied to the hosts of caterpillars of Abraxas miranda(Lep.:Geometridae)and Pieris rapae(Lep.:Pieridae)in the lab and in the field respectively in or-der to test their effect of insect control.Results showed that the extract from D. genkwa hadthe strongest feeding inhibition and toxicity to the insects tested which took 75 percent lessfeed than did the check group,and whose percentage of emergence also dropped markedly.The controlling effect of this extract could well last more than 5 days outdoors with a con-centration of 100 g/L. The next best extract was the one from M. azedarach,followed bythe one from the residual cakes of the seed of C. oleifera.
出处
《经济林研究》
1996年第4期17-20,共4页
Non-wood Forest Research
关键词
昆虫调控剂
茶枯
芫花
苦楝
药效测定
Insect controlling agent
Camellia oleifera
Daphne genkwa
Meliaazedarach
Feed inhibition
Stomach poison.