Sec. 30. As used in this chapter, "pesticide" means:
(1) any substance or mixture of substances intended for:
(A) preventing;
(B) destroying;
(C) repelling; or
(D) mitigating;
a pest; and
(2) any substance or mixture of substances intended for use as a:
(A) plant regulator;
(B) defoliant; or
(C) desiccant.