Root rot of carrot
in nonsterile soil remained viable at 0°C and 3°C for 12 months, at 6°C for 6 months, and at 12°C for 2 months, indicating a capacity to overwinter in [...] to 25°C, with an optimum around 18°C. Lesions are dark brown to black, moist, mostly circular spots 0.5 -1.2 cm diameter that extend only to 2 mm in the [...] slow-growing fungus that can infect both roots and foliage. The infection starts with small black spots over the entire surface of the carrot. These spots