Seed Irish Potato Certification Standards

A. Inspections 1. At least two field inspections shall be made. 2. An inspection shall be made of the tubers at the time of shipment. B. Field Standards Factor | Foundation | Registered | Certified Land Requirement | 1 yr. | 1 yr. | 1 yr. Isolation | 10 ft. | 10 ft. | 10 ft. Other Varieties and Off-type Plants | None | None | 0.10% Diseases* | 0.20% | 0.20% | 0.20% Mild Mosaic | 0.50% | 0.50% | 5.00% Sclerotium Rolfsii Wilt | 0.50% | 0.50% | 1.00% Potato Wart, Ring Rot, Late Blight | 1.00% | 1.00% | 1.00% Total Diseases | 0.30% | 0.30% | 0.30% Harmful Insects: Tuber Moth | None | None | None *Rugose mosaic, leafroll, spindle tuber, yellow dwarf, witches' broom, haywire, giant hill, rosette, spinach leaf, curly dwarf. C. Tuber Standards Factor | Foundation | Registered | Certified Stem End Discoloration | 2.50% | 2.50% | 5.00% Hair Sprout | 0.50% | 0.50% | 5.00 % Spindle Tuber | 0.20% | 0.20% | 1.00% Scab and Rhizoctonia* | 6.00% | 6.00% | 6.00% Net Necrosis | 0.50% | 0.50% | 5.00% Late Blight, Golden and Potato Rot, Potato Wart and Ring Rot | 1.00% | 1.00% | 1.00% Tuber Moth | None | None | None Sclerotium Rolfsii Wilt | 0.50% | 0.50% | 1.00% Nematodes (Root-Knot)** | 1.00% | 1.00% | 1.00% *6 percent of tubers by weight have more than 5 percent of the surface covered by scab or rhizoctonia. **1 percent of tubers by weight showing nematode (root-knot) infection. AUTHORITY NOTE: Promulgated in accordance with R.S. 3:1433. HISTORICAL NOTE: Promulgated by the Department of Agriculture, Seed Commission, LR 8:577 (November l982), amended by the Department of Agriculture and Forestry, Office of Agricultural and Environmental Sciences, Seed Commission, LR 12:825 (December l986), LR 20:643 (June 1994), repromulgated by the Department of Agriculture and Forestry, Office of Agricultural and Environmental Sciences, Agricultural Chemistry and Seed Commission, LR 39:2725 (October 2013).