Certified seed sweet potatoes, plants, and vines shall be divided into two grades as follows:
1. GRADE A shall be seed, plants or vines which showed no stem rot, soil rot, or mosaic in field inspections and which are visibly free in storage and plant bed inspection from black rot, scurf, soil rot, nematodes, or other serious diseases and insects.2. MISSISSIPPI CERTIFIED GRADE shall be seed, plants, or vines which shall not exceed the disease and insect tolerances as follows: a. Stem rot. No more than one-tenth (1/10) of one (1) percent of the hills found in the field inspections; the vines and tubers of which shall be dug and destroyed by the grower at time of inspection under supervision of the district entomologist of the Bureau of Plant Industry.b. Sweet Potato Mosaic. No tolerance.c. Black Rot. No more than one (1) percent of sweet potatoes showing black rot in storage inspection.d. Scurf. No more than five (5) percent of sweet potatoes showing the presence of scurf in storage inspection.e. Soil Rot. No more than one-tenth (1/10) of one (1) percent found in field inspection, the vines and tubers of which must be dug and destroyed by the grower at time of inspection under supervision of the district entomologist and no more than one (1) percent of sweet potatoes in storage inspection.f. Nematodes. No more than one (1) percent showing visible presence of nematodes in storage inspection.2 Miss. Code. R. 1-3-01-124.04
Miss. Code Ann. § 69-25-7