Every person, firm, association or corporation who shall issue, use or circulate any certificate, advertisement, tag, seal, poster, letterhead, marking circular, written or printed representation, or description of or pertaining to seeds, plants or plant parts or other farm products that may be defined by regulations intended for propagation or sale or sold or offered for sale wherein the words “Mississippi Certified,” or Mississippi State Certified, State Certified, or similar words or phrases are used or employed, or wherein are used or employed signs, symbols, maps, diagrams, pictures, words or phrases expressly or impliedly stating or representing that such seeds, plants or plant parts or other farm products comply with or conform to the certification standards or requirements as made by the approved state seed certifying agency of Mississippi, shall be subject to the provisions of this article, provided that this article shall not apply to the certification of plants or plant products for freedom from disease or insects which is now conducted under the authority of the Commissioner of Agriculture and Commerce. Every issuance, use, or circulation of any certificate or any other instrument as in this section above described shall be deemed to be “certification” as this term is employed in this article.