[2] Pythium violae causes elliptical shaped brown lesions surrounded by a thin yellow halo on the surface of the taproot.

[2] These lesions cause a blemished aesthetic appearance on the carrot, reducing their market value while maintaining yield.

[3] The lesions are, on average, less than half an inch in diameter and appear near harvest, but can grow as the carrot matures and grow larger on processing varieties of carrots.

[3] Low density hyphae are present in early formation of the lesions, but there is little to no presence of Pythium violae spores in the mature lesions making it difficult to diagnose in the field.

[3] Pythium violae has been shown to infect and produce similar necrotic lesions on other hosts such as alfalfa, wheat, and broccoli.