What is tomato blight? Solutions for early and late blight. Controlling blight on the plants is an important part of tomato plant care. Discover the best ways to prevent tomato diseases from taking hold in the first place.
Blight resistant tomato varieties.
There are 2 kinds of tomato blight: early and late. Both are fungal diseases but they occur at different times of the year. In the interest of space, I am mainly going to discuss late blight on this page.
Click the headline just below to learn about early blight.
You will discover tomato early blight treatment and control methods listed here. What is early tomato plant blight? (Alternaria solani
is the fungus responsible for early blight in tomatoes.) Signs of early tomato blight.
I have also listed blight resistant tomato varieties here and you can buy seed for some of these here.
Tomato late blight is a rapidly spreading fungal disease that can ruin a tomato or potato crop. This is the disease responsible for the Irish Potato Famine.
It occurs later in the tomato growing season than early blight and mainly during cool, wet weather. Greasy gray spots will appear on the tomato skin and leaves. Portions of the stems will turn black. The gray spots will eventually dry up and become papery.
Late blight tomato disease can overwinter in zones 10 and 11. It can survive inside seed potatoes in colder zones.
If blight has been a problem in your area during the previous growing season, remove all potato plant parts from the soil at the end of the season. Do not compost any of it, bag it and place it in the trash. Do not save seed potatoes.
To control late blight on tomato plants, spray them with a copper fungicide every 7-10 days. This is not a cure for blight but it will slow the progression of the disease.
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Info to Help You Grow Terrific Tomatoes