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《Journal of Anhui Agricultural Sciences》 2009-04
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Contact Toxicity of Plant Extracts on Aphis nerii

HE Yu-hua et al(Southwest Forestry College,Kunming,Yunnan 650224)  
[Objective] The aim was to explore the effects of 5 kinds of plant extracts on the biological activity of Aphis nerii.[Method] With Altingia excelsa,Eupatorium adenophorum,Jatropha curcas,Polygonum flaccidum and Podocarpus nagi as tested plants,the extracts were extracted by the dipping method.The contact toxicity of plant extracts on A.nerii were detected by micro spot method in the laboratory.[Result] The contact toxicity of the 5 kinds of plant extracts on A.nerii were P.flaccidum﹥P.nagi﹥A.excelsa﹥J.curcas﹥E.adenophorum.There was no significant difference on the corrected mortality of A.nerii among A.excelsa,P.nagi and E.adenophorum extracts with different concn,but there was a significant difference on the corrected mortality in different detecting time.There was no significant difference on the corrected mortality of A.nerii among J.curcas and P.flaccidum extracts with different concn.and in different detecting time.[Conclusion] The research provided the theoretical basis for the harmless control of A.nerii.
【Fund】: 西南林学院面上科研基金项目(200507M)
【CateGory Index】: S482.3
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