Biological Activity of Eup horbia heliosco p ia Extracts on Sitobion avenae
WANG Li-sha
TIAN Ti-wei
WANG Yi
LI Wei-zheng
GUO Xian-ru
Abstract：In order to study the insecticidal activities of Euphorbia helioscopia extracts ,the active substances of dry powders of Euphorbia helioscopia stems and leaves were extracted initially with 95% ethanol using impregnation method ,and the ethanol extracts were further extracted by petroleum ether ,chloroform ,ethyl acetate and N-butanol separately .The 4 kinds of extract obtained were used to determine contact activity and systemic activity to Sitobion avenae in laboratory .The contact activity test showed that the 4 kinds of extract were toxic to the adult aphid with the highest toxicity of chloroform extract (LC50=439.61 mg/L) ,followed by petroleum ether extract with LC50 of 552.63 mg/L .Significant difference was found in the systemic activity of 4 extracts on the aphid ,among which chloroform extract at 4 000 mg/L ,8 000 mg/L and 16 000 mg/L presented best biological activity with the corrected mortality of 85.23% ,83.42% and 91.40% after 3 days ,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 Euphorbia helioscopia extracts contain some bioactive substances to Sitobion avenae .
Keywords：Euphorbia helioscopiaextractSitobion avenaecontact activitysystemic activitybiological activity
Publication Date：2014-06-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 80-84 )