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Tomato Plant Leaves Turning Black

Question:

I have a tomato plant in a large container, and it has 4 small tomatoes on it. Yesterday I noticed that the leaves were turning black as if the plant had been scorched on the edges. What could be causing this? The plant in the next container is fine.
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Hardiness Zone: 6a

Peggy62 from Chillicothe

Answer:

Peggy,

It could be a couple of things.

Normally, leaf scorch is a result of stress from drought, or caused from pesticide burn or fertilizer burn. Check these first.

It you rule these out, then what you are describing could be blight. There are two types of blight, early and late. Both are a fungal disease commonly affecting potatoes and tomatoes. Symptoms on leaves start as tiny brown spots, which develop into greenish gray or brown areas that can expand to cover the entire leaf. These spots are sometimes surrounded by a ring of yellow tissue on the upper surface of the leaves and a ring of white fungal growth on the undersides of the leaves. Affected leaves drop early, which exposes fruit to sunscald.

Treatment is straightforward: remove or destroy infected plants and get rid of all debris. In your case, it's best to relocate your plant away from the others until you figure out whether or not it's infected. Pick off all infected leaves, and avoid watering from overhead because the splash may launch the disease spores. Don't over fertilize. If you believe there is a need, get the appropriate garden fungicide for vegetable crops and apply according to directions.

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If your plant ends up dying a premature death, make sure you get rid of all of the dead plant debris, then wash and sterilize the pot with a solution of 1 part bleach to 10 parts water. When replanting, look for disease-resistant cultivars. Also, preventative copper-based fungicides may sometimes help reduce the spread of early blight.

Ellen

More Answers:

Tomato Plant Leaves Turning Black

Sounds like mold to me. you might want to get some spray for it and spray the surrounding plants. dose it look like this? (05/23/2008)

By newlywedgal

RE: Tomato Plant Leaves Turning Black

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