Help with tomato leaf disease, please.

edweather · May 7, 2018

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

KarenO · May 7, 2018

Appears to be septoria leaf spot. Fungal. Don’t spray the diseased foliage, remove the diseased foliage and spray the healthy remaining plant.
KarenO

edweather · May 7, 2018

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.

edweather · May 12, 2018

Still looking good 4 days later. Thumbs up.

ginger2778 · May 12, 2018

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.

May 7, 2018	#3
edweather Tomatovillian™ Join Date: Jul 2012 Location: Southeast GA, USDA 9a, HZ9, Sunset Z28 Posts: 396	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. __________________ You'll be surprised what you'll never have to do, if you put it off long enough. Last edited by edweather; May 8, 2018 at 09:37 PM.

May 12, 2018	#4
edweather Tomatovillian™ Join Date: Jul 2012 Location: Southeast GA, USDA 9a, HZ9, Sunset Z28 Posts: 396	Still looking good 4 days later. Thumbs up. __________________ You'll be surprised what you'll never have to do, if you put it off long enough.

May 7, 2018	#2
KarenO Tomatovillian™ Join Date: Oct 2012 Location: Vancouver Island Posts: 5,932	Appears to be septoria leaf spot. Fungal. Don’t spray the diseased foliage, remove the diseased foliage and spray the healthy remaining plant. KarenO

May 12, 2018	#5
ginger2778 Tomatovillian™ Join Date: Aug 2011 Location: Plantation, Florida zone 10 Posts: 9,283	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.