Section R. 285.629.6 - Sampling and testing requirements; disease standards for seed potatoes excepted from certificationRule 6.
(1) If visual inspection results for the lot are not available for bacterial ring rot, late blight, or both or post-harvest tests are not available for the lot, growers must submit a 400-tuber sample for each seed lot that would plant 1 acre or a 200-tuber sample for each seed lot that would plant less than 1 acre, to a laboratory approved by the director.(2) Seed potatoes granted an exception by the director must be free from bacterial ring rot and late blight based upon visual or laboratory testing.(3) Growers must maintain the testing history and lab results specified in these rules as well as any documentation required by the act for a period of 2 years for each lot of seed potatoes planted.(4) Growers are responsible for all costs associated with sampling and testing.Mich. Admin. Code R. 285.629.6