As used in this subchapter, unless the context otherwise requires:
(1) “Insect pests and diseases” means insect pests and diseases injurious to plants and plant products of this state including any of the stages of development of such insects and diseases;
(2) “Persons” means individuals, associations, partnerships, and corporations;
(3) “Places” means vessels, cars, other vehicles, buildings, docks, nurseries, orchards, and other premises where plants and plant products are grown, kept, or handled; and
(4) “Plants and plant products” means trees, shrubs, vines, forage, and cereal plants, and all other plants; cuttings, grafts, scions, buds, and all other parts of plants; and fruit, vegetables, roots, bulbs, seeds, wood, lumber, and all other plant products.