My tomatoes were healthy during the spring and early summer; yet after a rain, they wilted and died very rapidly. I found a white fungal growth at the base of the plant.

My tomatoes were healthy during the spring and early summer; yet after a rain, they wilted and died very rapidly. I found a white fungal growth at the base of the plant.
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1 Answer

Answer :

A. This is southern blight, a soilborne fungus that lives on organic material in the soil. Deep burial of undecomposed organic material in the soil reduces this problem. Control foliage diseases of tomato plants, because the fallen leaves around the base of the plant feed the fungus and allow it to build up near the plant and cause damage. Crop rotation also reduces the incidence of southern blight.
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Related questions

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Description : What causes some of my early tomato fruit from the spring garden to be oddly shaped and of poor quality?

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What causes my upper tomato leaves to turn yellowish and fall off?

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