Late blight is the boogeyman of tomato growers everywhere. Even a mild case of early blight can reduce the quality and quantity of your tomato harvest as plants focus on repairing the damage instead of putting out fruit. While it’s not likely to kill your plants outright, early blight can turn a promising tomato season into a summer of disappointment. A bad case of early blight can lead to leafless tomato plants and sun-scorched fruit. The spots that form on the tomatoes themselves are often dark brown or black, and sunken, like pock-marks on the top of the fruit.Įarly blight tends to be most destructive to the leaves of your tomato plants. When fruit is affected by early blight, the rot usually begins at the base of the stem. Or it may spread through the stem, killing the tomato plant. If environmental conditions don’t change, or you don’t work to stop the spread of early blight, eventually the lesions will spread across the leaf – rotting it away completely. Eventually, the lesions will develop yellowish edges and darker interior rings. Those brown spots will gradually expand into lesions. In blighted tomato plants, you’ll see roundish, brown spots on the stem and lower leaves. Take a close look at the lower stem of your tomatoes. The first signs of early blight appear at the base of the plant. As long as the relative humidity is over 31%, early blight can start affecting your plants. Sometimes it’s very hot and very humid, but other times it’s just moderately hot with a little bit of humidity.
#LATE BLIGHT OF TOMATO PATCH#
In most summer seasons, a patch of hot, humid weather rolls in. Young tomato plants are less hardy, and are using their energy to grow big and strong. This is especially true early in the growing season. When the weather is 80F or above, humid, rainy, and damp, early blight comes out to play.
But early blight thrives in hot, humid temperatures. The Right Environment for Early Blightīoth blights affect tomatoes in humid weather. If you’ve planted the nightshade vegetables in close proximity, early blight can spread quickly from plant to plant. That means your potatoes, peppers, and eggplants are at risk. solani can affect other members of the nightshade family as well as tomatoes. In fact, it’s rare to have a tomato season go by without seeing a few signs of early blight.īoth A. It’s one of the most common tomato diseases. Tomato early blight is caused by the fungus can be caused by two, very similar fungi: Alternaria tomaphilia and A.
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