摘要
首次研究了天葵（Ｓｅｍｉａｑｕｉｌｅｇｉａａｄｏｘｏｉｄｅｓ（ＤＣ）Ｍａｋｉｎｏ的提取物对小菜蛾的生物活性。室内生测结果表明，天葵提取液对小菜蛾具有很好的拒食活性，其９５％乙醇提取液的原液对小菜蛾的选择性拒食作用和非选择性拒食作用分别为８２．５％和７６．８％，２４ｈ非选择性拒食作用的ＡＦＣ（５０）为０．２４５，回归方程Ｙ＝５．８０７＋１．３２３ｘ，相关系数ｒ为０．９８１，达极显著水平。２４ｈ或４８ｈ更换新鲜对碟饲虫的观察结果还证明，天葵提取液对小菜蛾的羽化有一定的不良影响。
The present paper is the first report dealing with biologital activity of the extract of Semiaquilegia adoxoidex (DC) Makino to diamond back moth Plutella xylostella (Linne). The results of bioassay indicated that the extract had effective antifeeding to the larvae of the moth. Choice-antifeeding and non choice-antifedding of the crude extract of 95% ethanol to the larvac are 82. 5% and 76. 8% respeetively. Within 24 huurs, AFC(50) of non choice-antifeedign is 0. 245, regression cquation Y= 5. 807 + 1. 323x, coefficient of correlation 0. 981 at significant levcl. The results of adding fresh leaf disks at 24h and 48h showed that the extract can influcnee pupation of the larvae and emergence of the moth.
基金
贵州省"八五"科技攻关项目
关键词
天葵
小菜蛾
生物活性
拒食作用
Semiaquilegia adoxoidex
Plutella xylostella
biological activity
antifeeding
