Phytophthora blight
optimal for crop growth. Phytophthora overwinters in roots, infected tubers and bulbs or in the soil in different stages: as oospores (sexual overwintering [...] blight, tomato blight, early / late blight tomato, potato blight and late / early blight of potato. Damage symptoms Phytophthora causes root rot, seedling [...] On the stem, elongated brown lesions occur, usually circling the stem. On potato tubers, blueish lesions appear, that can be seen through the skin. The Great