马齿苋提取物对枸杞蚜虫毒杀和拒食活性的研究(英文)

[Objective] The experiment studied on insecticidal and antifeedant action of on Portulaca oleracea L.to provide theoretical basis for developing a new botanical insecticide by taking Portulaca oleracea L.as a raw material.[Method] The insecticidal activities of the ethanol extracts and 5 kinds of extracts with petroleum ether,chloroform,ethyl acetate,n-butanol,water from Portulaca oleracea L..against Aphis sp.was studied;Leaves are using drug treatments of 5 extracts anti-feedant activity of Aphis sp.[Result] The results showed that 95% ethanol extract displayed high contact activity to Aphis sp.The corrected mortality after 48 h reached 95.4 % under the concentration of 50.00 mg·ml-1 and the insecticidal activities of 5 extracts against Aphis sp.was in the order that petroleum ether > chloroform > n-butanol > ethyl acetate >water.Five kinds of anti-feeding activity in the extract of the order for the water> ethyl acetate> n-butanol > chloroform >petroleum ether.[Conclusion] The extract from Portulaca oleracea L.has a strong contact toxicity of pesticide active on Aphis sp.substances and for a small polar compounds,the strong anti-feeding activity is a kind of larger polar compounds.

Study on the Insecticidal and Antifeedant Activity of Extracts from Portulaca oleracea L. on Aphis sp.

[Objective] The experiment studied on insecticidal and antifeedant action of on Portulaca oleracea L. to provide theoretical basis for developing a new botanical insecticide by taking Portulaca oleracea L. as a raw material. [Method] The insecticidal activities of the ethanol extracts and 5 kinds of extracts with petroleum ether , chloroform, ethyl acetate, n-butanol ,water from Portulaca oleracea L..against Aphis sp. was studied;Leaves are using drug treatments of 5 extracts anti-feedant activity of Aphis sp. [Result] The results showed that 95% ethanol extract displayed high contact activity to Aphis sp. The corrected mortality after 48 h reached 95.4 % under the concentration of 50.00 mg·ml-1 and the insecticidal activities of 5 extracts against Aphis sp. was in the order that petroleum ether > chloroform > n-butanol > ethyl acetate >water. Five kinds of anti-feeding activity in the extract of the order for the water> ethyl acetate> n-butanol > chloroform >petroleum ether. [Conclusion] The extract from Portulaca oleracea L. has a strong contact toxicity of pesticide active on Aphis sp. substances and for a small polar compounds, the strong anti-feeding activity is a kind of larger polar compounds.