Sec. 2. As used in this chapter, "active ingredient" means:
(1) in the case of a pesticide other than a plant regulator, defoliant, or desiccant, an ingredient that will:
(A) prevent;
(B) destroy;
(C) repel; or
(D) mitigate;
insects, nematodes, fungi, rodents, weeds, or other pests;
(2) in the case of a plant regulator, an ingredient that, through physiological action, will accelerate or retard the rate of growth or rate of maturation or alter the behavior of:
(A) ornamental or crop plants; or
(B) the produce of ornamental or crop plants;
(3) in the case of a defoliant, an ingredient that will cause the leaves or foliage to drop from a plant;
(4) in the case of a desiccant, an ingredient that will artificially accelerate the drying of plant tissue; and
(5) in the case of a nitrogen stabilizer, an ingredient that will prevent or hinder the process of nitrification, denitrification, ammonia volatilization, or urease production through an action affecting soil bacteria.