Corky Root

Pyrenochaeta lycopersici

corky root

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Infected plants gradually decline and die when placed under the stress of a fruit load. Growing points die back. Roots have irregular, black, cracked lesions on them, and the root system eventually dies.

Corky root is most severe on greenhouse tomatoes, where the cool soil conditions favor its development and spread. Soil fumigation is the most effective control.

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