Host Crops
Field and processing peas
Biology
The fungi causing root rot are soil borne. Root rotting fungi can attack any part of
the root system and even the lower portion of the stem at the soil line. When young
seedlings are infected with root rot, they usually die. Infected plants may appear
yellowed and stunted.
Symptoms of Damage
The lower stems and roots develop brown to black lesions. With severe disease, the below
ground parts of the plant are constricted, rotted and dark-brown. Plants that are severely
affected appear stunted, lose their lower leaves and die prematurely.
Scouting Techniques
Look for patchy stands because of missing plants in the rows. Affected plants may
appear stunted, wilted and prematurely ripened and have root decay.
Control Tips
Seed treatment offers some protection to the developing seedlings, especially under
cool, wet conditions when emergence may be delayed.
A 5-year crop rotation is also useful in preventing the build up of root rot organisms
in the soil. Do not include dry beans, fababeans, or alfalfa in rotations containing peas.
Avoid seeding into poorly-drained and low-lying areas. |
