Leaf Spot On Tomato

This leaf spot could be caused by a number of things. It appears fungal, although since the damage is on the top of the plant it’s possible that something landed on this plant and killed the tissue. Fungal diseases on tomatoes often appear on the lower foliage first. Did hot water from a hose hit this plant before the water cooled the sun-heated remains in the hose? Was a fertilizer liquid applied that might have splashed on the plant and burned it? Although there are a number of fungi that can be found on tomatoes the most common one in the northeast is early blight, but usually that moves from the bottom up. If you don’t have other tomatoes planted you’ll want to get another one since the main stem seems to be killed back on this one. When you plant a new tomato plant (or maybe you have others already?) be sure not to hit the foliage with anything if you can help it. You might also want to give any tomato you plant a good amount of space as this one was planted very close to something else. Plant tomatoes at least 2 1/2 feet from other plants.