| If rotation isn't working, you might need to try an insecticide containing carbaryl or permethrin. |
| Allethrin, the first synthetic pyrethroid, was developed 50 years ago, and permethrin was used for treating body lice over 20 years ago. |
| Insecticides used for seed treatments in crops include diazinon, lindane, imidacloprid, permethrin, chlorpyrifos, and tefluthrin. |
| Recommended chemical treatments include such common insecticides as permethrin, malathion, diazinon and sevin. |
| If the infestation is severe, topically administered permethrin, pyrethrin, or malathion also may help. |
| It is derived from a substance called permethrin, which was introduced as an alternative to a banned chemical called lindane. |
