First symptoms are yellow, stunted or wilted plants. Pythium infects young tissue, often root tips, and causes a dark brown to black wet rot that softens and disintegrates tissue. This disease commonly attacks below the soil surface from root tips to primary roots and sometimes to the base of the plant, and is favored by wet, poorly drained conditions.
Use pathogen-free growing media, plants, water, and equipment. Provide good drainage. Scout regularly for plants that either wilt or collapse during periods of water stress. Avoid water stress (both too much and too little) and extreme temperatures.
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