A pesticide is a substance which is used to do any of the following:
Kill, destroy, prevent, or repel any pest which may infest or be detrimental to man, animals or plants; Defoliate plants; Regulate plant growth; Used as a spray adjuvant.
If the chemical is used to do any of the above, it is a pesticide and all pesticide laws must be followed when handling, storing, or transporting the chemical. Restricted pesticides are subject to additional regulatory requirements. If you are not sure whether a chemical is a pesticide look for the EPA registration number. All pesticides have one. Or simply call your County Agricultural Commissioner's office.