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广藿香酮Pogostone,是一种新型的、被认为具有应用潜力的植物源杀虫活性物质。为探明广藿香酮的杀虫活性,本试验以斜纹夜蛾Spodoptera litura作为试虫,采用选择性和非选择性拒食活性测定法,在室内分别测定了不同浓度的广藿香酮对斜纹夜蛾的拒食活性以及广藿香酮对不同龄期的斜纹夜蛾的拒食作用,研究结果表明,1 mg/mL、2 mg/mL、4 mg/mL、8 mg/mL、10 mg/mL的浓度下,广藿香酮对三龄斜纹夜蛾幼虫的选择性拒食率分别为56.65%、62.24%、80.01%、82.40%、90.03%;非选择性拒食率分别为62.48%、71.78%、84.15%、86.35%、92.71%。浓度为4 mg/mL的广藿香酮对2龄、3龄、4龄、5龄斜纹夜蛾幼虫的选择性拒食率分别为78.56%、80.25%、66.80%、40.35%;非选择性拒食活性分别为78.21%、83.02%、77.36%、40.24%。可见,浓度为4 mg/mL的广藿香酮对三龄斜纹夜蛾的拒食效果较好。
Pogostone Pogostone is a new type of botanical insecticidal active substance that has potential applications. In order to explore the insecticidal activity of patchoulenone, this experiment Spodoptera litura Spodoptera as the test insects, the use of selective and non-selective antifeedant activity assay, were measured in different indoor concentrations of patchouli ketone twill The antifeeding activity of the insects and the antifeedant effect of patchoulen on different age groups of Spodoptera exigua showed that the antifeedant effect of 1 mg / mL, 2 mg / mL, 4 mg / mL, 8 mg / mL and 10 mg / mL The selective antifeedant rates of patchoulenone to 3rd instar Spodoptera litura were 56.65%, 62.24%, 80.01%, 82.40% and 90.03%, respectively; the non-selective antifeedant rates were 62.48% and 71.78% 84.15%, 86.35%, 92.71%. The selective antifeedant rates of patchoulenone at the concentration of 4 mg / mL for 2nd, 3rd, 4th and 5th instar larvae were 78.56%, 80.25%, 66.80% and 40.35%, respectively. Non-selective antifeedant Activity were 78.21%, 83.02%, 77.36%, 40.24% respectively. Visible, patchouli ketone at a concentration of 4 mg / mL of third instar Spodoptera litura antifeeding effect is better.