brunissement du talon

OBS: Pommes de terres. [...] Les inspecteurs américains utilisent les termes suivants pour décrire les facteurs qui causent l'altération de la couleur interne : net necrosis, stem-end browning, vascular discolouration, internal potato necrosis internal brown spot, heat or drought necrosis, internal black spot, internal mahogany browning et internal pink to purple discolouration.

CONT: Fusarium wilt can result in a variety of symptoms on tubers, ranging from surface decay to vascular discoloration. ... A shallow cut through the stem and reveals the streaky vascular discoloration referred to as ""stem-end browning.""