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Botrytis Stem and Pod Rot Appearance: symptoms can be observed on seedlings and mature plants. Seedling blight may occur if infected seed is planted. The stem completely rots at the soil line and the seedling becomes stunted, turns yellow, then dries up and dies. A higher percentage of seedling death than of infected seed planted can occur because the fungus spreads from diseased to healthy seedlings along rows. Infections on the lower stem later in the growing season can result in premature ripening. The infected portion of the stem is light brown or bleached and covered with a gray moldy growth. Infected portion of the stem is light brown or bleached and covered with a gray, moldy growth. Infected pods fail to fill properly, rot, turn brown, and are also covered with mold. Infected seeds may be discoloured and shriveled. Disease cycle: The disease is both seed and stubble-borne. The amount of seed infection is an important factor determining the severity of seedling blight. The severity of the disease on mature plants is dependent mainly on weather conditions during the growing season. Spores of Botrytis are spread from plant to plant by wind and rain-splash. Wet weather contributes to disease epidemics by providing suitable conditions for spore production and plant infection. Disease Control: Use disease-free seed or the best seed available to reduce seedling blight. The seed treatment Crown can be used to control seedling blights/seed rots caused by Botrytis and other pathogens.
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