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Avatar for Raveendrareddykv
Jul 26, 2016 10:33 AM CST
Thread OP

Tomato plants infected with curly top have curled,and the veins on the underside of the leaves are purple
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Jul 26, 2016 10:57 AM CST
Name: Robyn
Minnesota (Zone 4a)
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Tomato Heads Vegetable Grower Enjoys or suffers cold winters
Can you post a picture?

Without a picture, my guess is that the plant is not getting the nourishment it needs. There can be a lot of reasons for that. Are you able to get us the picture and some background about where the plant is and how you have been watering and feeding it?
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Jul 26, 2016 5:59 PM CST
Name: Rita
North Shore, Long Island, NY
Zone 6B
Charter ATP Member Seed Starter Tomato Heads I was one of the first 300 contributors to the plant database! Vegetable Grower Lover of wildlife (Raccoon badge)
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I agree that it seems like a nutritional deficiency.
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Jul 26, 2016 6:17 PM CST
Name: Sue
Ontario, Canada (Zone 4b)
Annuals Native Plants and Wildflowers Keeps Horses Dog Lover Daylilies Region: Canadian
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I'm not sure I understand the question correctly but the curly top virus the OP mentioned causes purple veins. Is the question how does the virus cause the purpling? I assume somehow it relates to an accumulation of anthocyanin pigment but I really don't know the mechanism. There's a picture here:
https://www.google.ca/search?q...
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Jul 27, 2016 5:05 AM CST
Name: Robyn
Minnesota (Zone 4a)
Apples Garden Photography Composter Herbs Seed Starter Solar Power
Tomato Heads Vegetable Grower Enjoys or suffers cold winters
Lol, oh. I completely missed the statement that they already have a disease.
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Jul 27, 2016 6:43 AM CST
Name: Joanne
Calgary, AB Canada (Zone 3a)
I was one of the first 300 contributors to the plant database! Garden Ideas: Master Level Region: Canadian Charter ATP Member Seed Starter Roses
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The plants need fertilizer. I like to use a granular type that slow releases for about 4weeks. If you use a water soluble type, results will be quicker.
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Jul 27, 2016 6:58 AM CST
Name: Sue
Ontario, Canada (Zone 4b)
Annuals Native Plants and Wildflowers Keeps Horses Dog Lover Daylilies Region: Canadian
Butterflies Birds Enjoys or suffers cold winters Garden Sages Plant Identifier
I don't think fertilizer will help, the infected plants do not recover:

".. tomato leaves curl and roll upward and the main leaf petiole curves downward. In time, the leaves also become leathery, veins turn a purplish color and the interveinal leaf area turns yellowish. Infected plants will not recover and eventually the plant stops growing and dies. Infected tomatoes may ripen even when immature; however, edible size fruits are likely to be bitter. Once definite symptoms are observed, it is best to pull out the plant and destroy it."

From Arizona Cooperative Extension
https://cals.arizona.edu/yavap...
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