Affected seedlings first turn light green and are stunted. As the disease progresses, seedlings wilt and then die. Symptoms on the affected seedlings vary according to the causal fungus involved. Black root rot seedling disease. Note coal-black tap root.
Pythium causes a watery, straw colored decay of the roots.
Pythium seedling disease is most severe during cool, wet conditions. Pythium seedling disease. Pythium seedling disease. Rhizoctonia attacks the seedling, forming dark, reddish brown, sunken lesions on the hypocotyl near soil level. Note reddish-brown sunken lesion on main stem and root near soil line.