益母草抽提物杀虫、螨作用及其机制研究

益母草抽提物对柑桔全爪螨与桃蚜有效，其甲醇抽提物的药效最佳；在甲醇抽提物中的杀虫、螨有效成份初步确定为水苏碱与益母草定等。益母草抽提物对虫、螨以触杀作用为主，对其无敌瓢虫安全，对捕食螨亦有一定的选择作用。益母草抽提物的毒理作用机制是神经性毒剂，对酯酶、乙酰胆碱酯酶有一定的抑制作用。从渗透代谢试验表明，水苏碱对桃蚜表皮有较强的渗透作用，其渗透速率能保证药物迅速到达作用靶位，在药物被代谢之前就使虫、螨中毒致死。

Studies on Mode of Action and Effectiveness of Extracts of Leonurus Heterophyllus Sweet Against Insects and Mites

Extracts of Leonurus heterophyllus sweet against peach aphis and citrus red mi te areeffective. Its extract of methanol is most effective, Seachydrine, leonuridine and leonurine areconsidered preluninarily to be effective composition,Its main action is contact toxicity and it is safe tonatural enemy for example ladybug. Its mode of action is neurotoxin. It can inhibite esterase andacetylcholinesterase of insect.Its main compeition-stachydrine can fasdy and effectly permeatecuticle of insect to reach action-target. That is important to control effeetively insect and mite.