Friday, March 19, 2010

Early Blight vs. Septoria Leaf Spot

After more reading, more inspecting, and more thinking I started to have a deep suspicion that my tomatoes had been misdiagnosed. The spots seemed too small and too numerous to be blight. I saw multiple articles that discussed two different diseases, both common and commonly mistaken for each other. Maybe my plants had Septoria Leaf Spot rather than blight.

I took some pictures of infected leaves and posted them on the forums of http://www.yougrowgirl.com/ (only the best website ever!) Sure enough, it is Septoria Leaf Spot! The treatment for the disease is the same as early blight: copper. Since the copper/sulfur dust that I had previously tried didn't work it was suggested that I try liquid copper instead. I bought some yesterday and sprayed.

Let's hope the copper works and I end up with some healthy tomatoes!

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