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Medium_tomato_leaf_disease What is this disease on my oxheart tomato plants

The lower leaves have yellow blotches and are curling up and dying. The plants were doing really well till now. The white powder on the underside of the leaf on the left of the picture is a pesticide dust which we have just applied.

Submitted: 11:05PM, 01 Apr 2015
Answer: Tomatoes are prone to fungal diseases, this is the most likely culprit for your tomatoes problem. remove the leaves and dispose of them offsite. The bottom leaves of tomatoes are often removed to increase airflow and reduce the transmission of diseases from the soil. If the problem persists you might need to apply a product like Yates Lime Sulfur to help control the problem.
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Answered: 09:53AM, 10 Apr 2015

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