Division Note:

The standard sample size is 200 tubers per test. More intensive sampling requires more tests on samples of this size. Larger numbers of tubers in the sample will lead to inhibition or difficult interpretation of the results. However, the procedure can be conveniently applied for samples with less than 200 tubers where fewer tubers are available.

Validation of all detection methods described below is based on testing of samples of 200 tubers.

The potato extract described below can also be used for detection of the potato brown rot bacterium, Ralstonia solanacearum.