Leaf Roll in Tomato

Once again we’re seeing quite a bit of leaf roll in tomatoes this year. This is a physiological problem that has been attributed to a number of causes, including excessive nitrogen, excess moisture and extended periods of warm dry weather as we transition from spring to summer. Certain varieties tend to be affected more than others, and indeterminate varieties seem to be more prone to the condition than determinate varieties.  The good news is that it doesn’t really hurt production.

Physiological leaf roll of tomato.

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About Don Ferrin

I am an associate professor and extension specialist in the Department of Plant Patholgy & Crop Physiology with the LSU AgCenter in Baton Rouge. I have statewide responsibility for issues and educational programs related to diseases of all horticultural crops in Louisiana.
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2 Responses to Leaf Roll in Tomato

  1. Gerard Ballanco says:

    Is there a reasonably easy way to distinguish this from thrip infestation?

    • Don Ferrin says:

      If you are seeing leaf rolling associated with thrips, it’s most likely because the plants have tomato spotted wilt, a virus disease transmitted by the thrips. The plants will also be stunted, have necrotic blotches on the leaves, and stop producing fruit. With physiological leaf roll, the plants will not be stunted and will continue to produce fruit.

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