An agent used to kill mites or ticks.

In full pyrethrum powder. A powdered insecticide containing pyrethrins, obtained from the flower heads of Tanacetum cinerariifolium and related…

a compound, the gamma isomer of which is used as an insecticide, = gammexane, n.; abbreviated B.H.C.

A systemic pesticide or medicinal agent. Cf. sense A. 3.

The active isomer of chloralose, used as a pesticide against birds and rodents, and in veterinary medicine as an anaesthetic and sedative.

Originally: an insecticidal powder produced by grinding the flower heads of the plant pyrethrum, Tanacetum cinerariifolium. In later use also: any…

a toxic crystalline compound, Cl3C·CCl3, having uses as an insecticide and anthelmintic and as an ingredient in smoke-producing mixtures.

A substance for destroying pests, esp. insects. Also (occasionally): a herbicide. Also figurative.

An aerosol spray pesticide or similar large can of a fogging (fog, v.1 7) compound used to kill indoor flying insects. Frequently with preceding…

Insecticide or insect repellent. Cf. bug dope n. at bug, n.2 compounds 2b.

An agent used to kill the adult forms of a pest or parasite.

A substance used to kill mites.

A viscous liquid insecticide, C10H6Cl8.

hexachlorocyclohexane; = benzene hexachloride n. at benzene, n. compounds; esp. (in full gamma-HCH) = lindane, n.

The gamma isomer of benzene hexachloride, C6H6Cl6, used as an insecticide; it is a colourless crystalline compound that is toxic to mammals but…

A synthetic pyrethroid compound used as a contact insecticide; any of a group of pyrethroids including this compound and its derivatives.

An insecticide compounded of pyrethrins and piperonyl butoxide.

An insecticide that is a stereoisomer of aldrin, C12H8Cl6.

An insecticide and acaricide which has been used to treat scabies in humans and to eradicate ectoparasites in animals; tetraethylthiuram…

An organochlorine insecticide used esp. against ants.

A synthetic insecticide and acaricide of low toxicity to mammals and short lifetime; 1,2-dibromo-2,2-dichloroethyl dimethyl phosphate…

A fast-acting insecticide and acaricide.

A carbamate pesticide, used chiefly in slug pellets and as a bird repellent; 4-methylthio-3,5-xylyl-N-methylcarbamate, C11H15NO2S.

A systemic insecticide that has been used to treat field crops and is highly toxic to birds and humans.

A systemic carbamate pesticide used against mites, insects, and esp. nematodes.

A persistent insecticide, used esp. against aphids.

A substance that kills ticks; an acaricide.

A sesquiterpenoid analogue of juvenile hormone that prevents the maturation of insect eggs and larvae and is used for the control of mosquitoes…