40 CFR 152.5 - Pests.
An organism is declared to be a pest under circumstances that make it deleterious to man or the environment, if it is:
(b) Any invertebrate animal, including but not limited to, any insect, other arthropod, nematode, or mollusk such as a slug and snail, but excluding any internal parasite of living man or other living animals;
(c) Any plant growing where not wanted, including any moss, alga, liverwort, or other plant of any higher order, and any plant part such as a root; or
Title 40 published on 2014-07-01
no entries appear in the Federal Register after this date.