1. The state entomologist shall, from time to time, adopt rules for carrying out the provisions and requirements of this chapter, including rules under which the inspectors and other employees shall: a. Inspect places, plants and plant products, and things and substances used or connected therewith,b. Investigate, control, eradicate and prevent the dissemination of insect pests and diseases, andc. Supervise or cause the treatment, cutting and destruction of plants and plant products infested or infected therewith.2. The state entomologist, the entomologist's inspectors, employees, or other authorized agents shall have authority to enforce these rules which shall be published in the same manner as are the other rules of the department.3. A nursery stock dealer shall not sell, offer for sale, or distribute nursery products by any method, or under any circumstances or condition, which has the capacity and tendency or effect of deceiving purchasers or prospective customers as to quantity, size, grade, kind, species, age, maturity, viability, condition, vigor, hardiness, number of times transplanted, growth ability, growth characteristics, rate of growth or time required before flowering or fruiting, price, origin or place where grown, or in any other material respect.4. When under the provisions of this section it becomes necessary for the state entomologist to verify sizes and grades of nursery stock, or either of them, the entomologist shall use as a guide the "American Standard for Nursery Stock" as revised and approved by the American standards association, inc.S13, §2575-a48; C24, §4050, 4051, 4054; C27, 31, 35, §4062-b6; C39, §4062.06; C46, 50, 54, 58, 62, 66, 71, 73, § 267.6; C75, 77, 79, 81, §177A.62009 Acts, ch 41, §73