Late blight can damage your entire plant! Watch for early indications like small dark spots or dots on the foliage the spots are typically wet as well. In contrast to Septoria leaf spot and early blight, late blight isn't a fungus, it's a mold. When it gets to the fruit it destroys your tomatoes with similar-looking large brown, ringed lesions, that cause it to fall off the plant and onto the ground. Early blight can also spread to the stems and fruits. The brown circles become lesions that split the leaf open creating holes. One of the first signs of early blight is the appearance of brown circles on the leaves that have rings like a slice of a tree trunk or a bull's eye. Early BlightĮarly blight is another type of fungal tomato disease. It happens when the sun burns fruits or foliage and creates dry patches that reduce the quality of your harvest. Sunscald is essentially sunburn for plants. It can defoliate your plant or cause it to lose infected leaves, this in turn exposes your fruits to sunscald. Signs of Septoria leaf spot include small brown or beige circles on yellowing leaves with a black fungal spore in the center. Septoria leaf spot is a fungal infection that thrives between 68 and 77 degrees Fahrenheit and primarily targets leaves and stems. Here's what to look for: Septoria Leaf Spot If you don't take action to prevent or treat tomato diseases your harvest could be of lesser quality and your plant could even die. Tomato diseases quickly spread and damage the foliage, stems, and fruits on your tomato plants.
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