ANNEX I METHOD FOR THE DETECTION AND DIAGNOSIS OF THE RING ROT BACTERIUM, CLAVIBACTER MICHIGANENSIS (Smith) Davis et al. ssp. SEPEDONICUS (Spieckermann et Kotthof) Davis et al. IN BATCHES OF POTATO TUBERS

1. Removal of heel-end cores

1.1. Wash 200 tubers in running tap water and remove the epidermis around the heel end of each tuber using a regularly disinfected scalpel or potato peeler; disinfection may be achieved by dipping the peeler in 70 % ethanol and flaming.