Bioefficacy of Couroupita guianensis (Aubl) against Helicoverpa armigera (Hub.) (Lepidoptera: Noctuidae) larvae

被引：22
作者：
Baskar, K. [1 ]
Maheswaran, R. [1 ]
Kingsley, S. [1 ]
Ignacimuthu, S. [1 ]
机构：
[1] Loyola Coll, Entomol Res Inst, Madras 600034, Tamil Nadu, India
来源：
SPANISH JOURNAL OF AGRICULTURAL RESEARCH | 2010年 / 8卷 / 01期
关键词：
antifeedant; hexane; larvicidal; phytochemicals; ANTIFEEDANT ACTIVITY; FEEDING DETERRENTS; PLANT-EXTRACTS; INSECTICIDES; MELIACEAE; QUINONES; HUBNER;
D O I：
10.5424/sjar/2010081-1152
中图分类号：
S [农业科学];
学科分类号：
09 ;
摘要：
With a view to develop an ecofriendly botanical pesticide, we evaluated the bioefficacy of crude extracts of Couroupita guianensis against third instar larvae of Helicoverpa armigera. Maximum feeding deterrency (81.67%) and least LC50 (2.72%) for larval mortality were seen in hexane extract. Hexane extract was subjected to column chromatography using different ratio of hexane-ethyl acetate solvent system. Totally eight fractions were collected. The fractions were screened at 125, 250, 500 and 1,000 mg kg(-1) concentrations against H. armigera using no-choice leaf disc method. Fraction eight showed maximum antifeedant (86.24%) and larvicidal (80.88%) activities at 1,000 mg kg(-1) concentration. C. guianensis could be utilized in pest control programme.
引用
收藏
页码：135 / 141
页数：7
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