Terms used in this chapter mean: (1) "Animals," all vertebrate and invertebrate species, including humans; (2) "Bulk pesticide," any volume of a pesticide, which is transported or held in an immediate reusable container, in undivided quantities greater than one hundred pounds net dry weight or fifty-five United States gallons liquid measure, but not including pesticides that are in the custody of the ultimate user and are fully prepared for use by the user; (3) "Bulk pesticide storage facility," any area, location, tract of land, building, structure, or premises, constructed in accordance with rules promulgated by the secretary, pursuant to chapter 1-26 , for the storage of bulk pesticides; (4) "Certified applicator," any individual certified under this chapter to use any pesticide; (5) "Commercial applicator," a certified applicator, eighteen years of age or older, who uses pesticide, on any property, other than as a private applicator; (6) "Defoliant," any substance or mixture of substances intended to cause the leaves or foliage of a plant to drop, with or without causing abscission; (7) "Desiccant," any substance or mixture of substances intended to artificially accelerate the drying of plant tissue; (8) "Device," any instrument or contrivance intended for trapping, destroying, repelling, or mitigating insects, or for destroying, repelling, or mitigating fungi, weeds, rodents, or any other pests designated by the secretary, but not including: (a) Equipment used for the application of pesticides, if sold separately; and (b) Rodent traps; (9) "Environment," water, air, land, and all plants and animals living therein, and the interrelationships that exist among them; (10) "Equipment," any ground, water, or aerial equipment, or any device that uses motorized, mechanical, or pressurized power to apply pesticide, but not including a pressurized, hand-sized, household device that requires the person applying the pesticide to be the source of power or energy to make the pesticide application; (11) "Fungus," any nonchlorophyll-bearing thallophyte, except those on or in processed food, beverages, or pharmaceuticals, or those on or in living animals; (12) "Insect," any small invertebrate animal belonging to the class insecta or to other allied classes of arthropods; (13) "Labeling," any written, printed, or graphic matter: (a) That is on the pesticide or device, or on any of its containers or wrappers; (b) That accompanies the pesticide or device, at any time; or (c) To which reference is made in literature that accompanies the pesticide or device, except for accurate, nonmisleading references to current publications of any government institution or agency of the United States, or of this or any other state, authorized by law to conduct research in the field of pesticides; (14) "Land," all land and water areas, including airspace, and all plants, animals, structures, buildings, contrivances, and machinery, appurtenant thereto or situated thereon, fixed or mobile, including any used for transportation; (15) "Pesticide dealer," a person who distributes: (a) A restricted-use pesticide; (b) A pesticide that is restricted in use or distribution, by regulation; or (c) A pesticide that is to be applied to agricultural land and is provided in a container larger than one hundred gallons; (16) "Nematode," any invertebrate animal of the phylum ne-mathel-minthes or nematoda; (17) "Pest," any insect, rodent, nematode, fungus, weed, or other form of terrestrial or aquatic plant or animal life or virus, bacteria, or other microorganism, except viruses, bacteria, or other microorganisms on or in a living human or other living animal, which the secretary declares to be a pest; (18) "Pesticide," any substance or mixture of substances intended to: (a) Prevent, destroy, repel, or mitigate any pest; (b) Be used as a plant regulator, defoliant, or desiccant; or (c) Be used as a spray adjuvant; (19) "Plant regulator," any substance or mixture of substances, intended, through physiological action, to accelerate or retard the rate of growth or rate of maturation, or for otherwise altering the behavior of ornamental or crop plants, or the produce thereof, but not including substances to the extent they are intended as plant nutrients, trace elements, nutritional chemicals, plant inoculants, or soil amendments; (20) "Private applicator," a certified applicator, eighteen years of age or older, who: (a) Uses any pesticide, other than a restricted-use pesticide, for purposes of producing any agricultural commodity amounting to greater than one thousand dollars gross sales potential per year, on property owned or rented by the private applicator or the private applicator's employer; (b) Uses any restricted-use pesticide for the purpose of producing any agricultural commodity on property owned or rented by the private applicator or the private applicator's employer; (c) Applies any pesticide on the property of another, without compensation, other than the trading of personal services between producers of agricultural commodities; or (d) Is not regularly in the business of applying pesticides for hire, as a principal or regular occupation, and is not held out to the public as a commercial applicator; (21) "Registrant," the person registering any pesticide in accordance with this chapter; (22) "Restricted-use pesticide," any pesticide classified as a restricted-use pesticide by the secretary; (23) "Rinsate," any solution containing pesticide residue, which is generated from the washing or flushing of pesticide containers and pesticide equipment; (24) "Secretary," the secretary of the Department of Agriculture and Natural Resources; (25) "Spray adjuvant," any wetting agent, spreading agent, sticker, deposit builder, adhesive, emulsifying agent, deflocculating agent, water modifier, or similar agent, intended to be used with any other pesticide as an aid to the application or to the effect thereof, and which is in a package or container separate from that of the pesticide with which it is to be used; (26) "Unreasonable adverse effects on the environment," any unreasonable risk to humans or the environment, taking into account the economic, social and environmental costs and benefits of the use of any pesticide; and (27) "Weed," any plant that grows where it is not wanted.