Aboveground symptoms include stunting, chlorosis and even plant death. Infected roots decay and thicken. They may be very black in color in mixes containing soil. Belowground stems may develop black, longitudinal cracks. Basal stem and root lesions are drier than those caused by Rhizoctonia.
Disease development is greatly reduced at pH 5.5 or below and is suppressed at temperatures above 72F. Use pathogen-free plants, sterile containers, clean growing areas and pasteurized growing media. Rogue severely infected plants. Provide crops with good drainage and proper irrigation. Use lowest rate of fertilizer consistent with good plant growth and minimize plant stress. Fungicide drenches can be used to protect very susceptible plants from infection.
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