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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。
Motherwort extract of citrus red mite and peach aphid effective, the best methanol extract; methanol extract of insecticide, mite active ingredient was initially identified as stachydrine and motherwort set. Motherwort extract on insects, mites to contact the main role of its invincible ladybug security, on the predation of mites also have a select role. Motherwort extract toxicological mechanism of action is a nerve agent, on esterase, acetylcholinesterase have some inhibitory effect. From the osmotic metabolism test shows that stachydrine Peach aphid epidermis has a strong penetration, the penetration rate to ensure that drugs quickly reach the target role in the metabolism of drugs before the worm, mites poisoning.