La. Stat. tit. 3 § 1652
The Department of Agriculture and Forestry shall have full and plenary power to deal with all crop and fruit pests and such contagious and infectious crop and fruit diseases as in the opinion of the entomologist, may be prevented, controlled, or eradicated; with full power to make, promulgate and enforce such rules, ordinances and regulations, and to do and perform such acts as, in the judgment of the entomologist, may be necessary to control, eradicate, or prevent the introduction, spread, or dissemination of all injurious crop and fruit pests and diseases. The rules, ordinances and regulations of the department shall have the force and effect of law five days after their promulgation in the official journal of the state. The department may prohibit or regulate the shipment or bringing into this state of any plants, farm products, or other articles of any nature or character whatsoever from any state, territory, or foreign country, when in the opinion of the entomologist the prohibition or regulation is necessary.
La. R.S. § 3:1652