Title: Biological Activity of Euphorbia helioscopia Extracts on Sitobion avenae
Abstract: In order to study the insecticidal activities of Euphorbiahelioscopiaextracts,the active substances of dry powders of Euphorbia helioscopiastems and leaves were extracted initially with95% ethanol using impregnation method,and the ethanol extracts were further extracted by petroleum ether,chloroform,ethyl acetate and N-butanol separately.The 4kinds of extract obtained were used to determine contact activity and systemic activity to Sitobion avenae in laboratory.The contact activity test showed that the 4kinds of extract were toxic to the adult aphid with the highest toxicity of chloroform extract(LC50=439.61mg/L),followed by petroleum ether extract with LC50of 552.63mg/L.Significant difference was found in the systemic activity of 4extracts on the aphid,among which chloroform extract at 4 000mg/L,8 000mg/L and 16 000mg/L presented best biological activity with the corrected mortality of 85.23%,83.42% and91.40%after 3days,followed by N-butanol extract,and petroleum ether extract showed lowest activity.The systemic activity of each extract was positively related to its dosage and treatment time.These illustrate that the Euphorbiahelioscopiaextracts contain some bioactive substances to Sitobion avenae.
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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