Root rot of carrot
soil and the air. The fungus develops at temperatures ranging from -3°C to 25°C, with an optimum around 18°C. Lesions are dark brown to black, moist, mostly [...] spots 0.5 -1.2 cm diameter that extend only to 2 mm in the root, up to 20-25 per carrot root. They occur haphazardly. The fungus sporulates on root, leaf [...] Rhexocercosporidium carotae develops at temperatures ranging from -3°C to 25°C, with an optimum around 18°C; temperature affects both host defense processes