Apple collar rot
General Phytophthora cactorum is a plant pathogen that causes root rot, rhizome rot of strawberry, apple rot, apple collar rot and crown rot. It has an [...] Phytophthora cactorum causes seedling damping off, a reduced root system and black discolouration of the roots. On the foot, dark brown lesions with sharp [...] first, then the whole plant. Life cycle and appearance of Apple collar rot Phytophthora species are very destructive organisms belonging to the Oomycetes