From Longman Dictionary of Contemporary Englishinsecticidein‧sec‧ti‧cide /ɪnˈsektɪsaɪd/ noun [uncountable] THBIa chemical substance used for killing insects → pesticide —insecticidal /ɪnˌsektəˈsaɪdl◂/ adjective
Examples from the Corpus
insecticide• Do not use any insecticide sprays in the house, or pesticide sprays in the garden.• If you have a lot of plants and don't want to use any of the usual chemicals, try a biological insecticide.• Almost like new roses themselves, chemical insecticides and fungicides come and go with remarkable rapidity.• For example, the bacterium Bacillus thuringiensis has the ability to produce crystalline spores which act as natural insecticides.• Treatment involves the application of insecticide by pressure spray in the form of pungent solvents or water-based emulsions or pastes.• The wood must be free of insecticides and herbicides.• But they began to develop resistance to the insecticide.• Last year, insecticide efforts essentially failed. 