Ask a Question forum: Tomato blight

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Kansas City
Jul 20, 2017 4:18 PM CST
Hi! My husband and I have been gardening for about 5 years now and grow a variety of different vegetables and fruits in our backyard garden. We love our tomatoes and love to have enough to can every year. For the past three years we've been having big problems with what I think is blight and it's beginning to get really frustrating. Around early July each year our tomatoes begin to yellow from the bottom up very rapidly. There are also small spots on the leaves and sometimes on the fruit. Some varieties, mostly the bigger tomatoes, seem to have a much harder time with it. We've tried copper spray and daconil in the pst with limited success. We can keep them alive but it's a struggle, they look very sad, and it's definitely affecting the yield. Same struggle this year, except I've had some success spraying them with a baking soda and water mixture. It actually made a huge difference overnight the first time I used it, most of the yellow turned to brown and it didn't spread. However it rained yesterday and due to work and evening commitments I wasn't able to get out to spray them again. They've yellowed even more now and I know another layer of branches will die off. One of our plants is almost dead due to the leaves dying off. We are so frustrated and I don't know why we are having such a huge problem with the nearly killing of several of our plants each year. We moved our tomatoes to a new area this year hoping that would help and we're still fighting back the blight (or whatever it is). They aren't overly crowded. What are we doing wrong?!
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Name: greene
Savannah, GA (Sunset 28) (Zone 8b)
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Jul 20, 2017 4:29 PM CST
Are you rotating your crops? Planting tomatoes in the same place year after year can be a bad idea.

If possible, select tomato varieties that have been bred to resist diseases.

Here is a link that explains disease-resistant tomato varieties.

Here is a link to show the various diseases and their causes.
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Name: Dave Whitinger
Jacksonville, Texas (Zone 8b)
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Jul 20, 2017 9:00 PM CST Admin

We also have this article that may provide some additional insight:

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