Since 'pesticides' are often produced to help remove pests/insects from garden vegetation, it would seem to be the accepted 'occupation' that you describe. 'Bugs' is another term given to both flying and crawling insects, and which accuses them 'occupationally' of bugging us.
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GPYI agree with the previous answers, but if you specifically want to refer to bugs alone, you could say "insect pests". "pests" by itself could potentially include other animals, such as rodents.Thanks again, GPY!:)
deadrat Better to say "insect pests."Even if I do want to emphasize their INSECT genus?