Pesticide
From Tardis Wiki, the free Doctor Who reference
Pesticide deters or kill pests. A specific kind of pesticide, insecticide worked against insects.
In the early 1960s, Dr. Forester committed murder to cover up the far-reaching and dangerous side effects of DN6, the insecticide which he had developed. DN6 worked so effectively that, if used, widely it would have caused serious harm to Earth's ecology. (DW: Planet of Giants)
The Pharm developed pesticides from captive Weevils. (TW: Reset)
