. "(78) Pesticide means (i) any substance or mixture of substances intended for preventing, destroying, repelling, or mitigating any insects, rodents, fungi, weeds, or other forms of plant or animal life or viruses, except viruses on or in living humans, or other animals, which the Commissioner of the New York State Department of Environmental Conservation shall declare to be a pest or (ii) any subst" . . . . . . . .