what does pyrethrin kill

Pyrethrin is an insecticide that kills a wide range of insect pests including ants, mosquitoes, moths, flies, fleas, stink bugs, and aphids. Pyrethrins excite the nervous system of insects that touch or eat it, leading to paralysis and ultimately their death. Pyrethrins are often mixed with another chemical called a synergist to increase their effect. Pyrethrins are highly to very highly toxic to fish, lobster, shrimp, oysters, and aquatic insects. Pyrethrins are low in toxicity to people and other mammals, but if it gets on your skin, it can be irritating and cause tingling or numbness at the site of contact.