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Old May 7, 2018   #1
edweather
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Default Help with tomato leaf disease, please.

Everything was perfect until a few days ago. Noticed this on the backside of 3 of 4 plants. The only plant unaffected yet, is the potato leaf variety. I sprayed with Daconil last week, and copper last night. The Rutgers is the worst. Leaves are yellowing, and then turning brown on the surface. Looks like small brown spots on the backs of the leaves. Not sure if bacterial or fungal. My best guess is some kind of "spot." I pruned some of the foliage on the less affected plants, but should probably do some severe pruning on the Rutgers. Hopefully this isn't chronic, but it's spreading fairly fast. It's odd, because the weather has been great, sunny and warm with not too much humidity. Any help is greatly appreciated. Thanks, Ed
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Old May 7, 2018   #2
KarenO
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Appears to be septoria leaf spot. Fungal. Don’t spray the diseased foliage, remove the diseased foliage and spray the healthy remaining plant.
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Old May 7, 2018   #3
edweather
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Thanks for the info. Hopefully I can save a couple of the plants.

edit: Pruned as much as I could, and soaked them in Daconil. No further damage today.....optimistic.
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Last edited by edweather; May 8, 2018 at 08:37 PM.
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Old May 12, 2018   #4
edweather
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Still looking good 4 days later. Thumbs up.
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Old May 12, 2018   #5
ginger2778
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Septoria. It also looks like a little early blight on one of the photos. Copper spray at 1/2 of weakest recommended dose, after removing diseased leafs. You said you sprayed with copper, so they are likely OK, just keep it up every 7-10 days as a preventive, and also after a heavy rain. Glad thry are recovering.
BTW- fungal diseases can show up just with leaves wet from dew for a few hours.
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