Tomato disease - what is it & should I be worried about next season

Tomato    Lausanne, Switzerland

In early July, all my tomatoes started getting spots on leaves. The bottom leaves were affected first, and they turned brown quickly. I was abroad at that time, and by the time I got home things had deteriorated quickly, and all plants were affected.

Because the tomato fruits didn't look affected, I decided not to intervene. However, I'm worried that this decision might have been a mistake and that I might have contaminated my soil.

My question is, what's affecting my plants? From our tomato library page, the symptoms seem to be best described by Septoria leaf spots. Is that diagnosis correct?

Posted by: deactivated (25 points) deactivated
Posted: August 24, 2013


From your description and the photo it appears that your tomatoes may be suffering from Septoria leaf spot. Crop rotation will help to lessen the symptoms next year because the fungus may survive in the crop residue for a few years. Mulching may help to slow the splash of spores from the soil to the leaves. Pruning old leaves as they become diseased and destroying them will help. There are also fungicides that will slow the disease if you consider that an option. The link below might answer a few questions. http://www.extension.purdue.edu/extme...

Posted by: dan egel (2 points) dan egel
Posted: August 25, 2013

According to Cornell, septoria leaf spot does not reside in the soil but it does reside in any plant materials that might be in the soil.

Posted by: Susan League, UF/IFAS Sumter Program Assistant (1 point) Susan League, UF/IFAS Sumter Program Assistant
Posted: August 26, 2013

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