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Tomato leaf curl


 
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Charles_Dimmock
Rank attained: Hawthorn Tree
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Joined: 27 May 2010
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PostPosted: Mon Jun 21, 2010 9:49 pm    Post subject: Tomato leaf curl Reply with quote

Is this a sign of over watering?

I have to admit I have been v generous in this hot weather, if the top soil is dry I've watered them forgetting what's going on underneath.
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Belfast
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PostPosted: Mon Jun 21, 2010 9:58 pm    Post subject: Reply with quote

Tomato viruses
http://apps.rhs.org.uk/advicesearch/profile.aspx?pid=250

Cause of Tomato Leaf Curl
http://wiki.answers.com/Q/What_causes_leaf_curl_on_tomato_plants
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michael brenock
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PostPosted: Tue Jun 22, 2010 8:03 am    Post subject: Reply with quote

the curling of the older and lower tomato leaves is indicative of high atmospheric temperatures so improve the ventilation. Where curling is on top leaves it usually indicates excess nitrogen and vigorous growth. Where the leaf turns upwards it indicates the leaf is near the end of it's useful life and will start to turn yellow. Curling and twisting of leaves usually indicates virus disease.
michael brenock horticultural advisor (retired)
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Charles_Dimmock
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PostPosted: Tue Jun 22, 2010 9:53 am    Post subject: Reply with quote

Is there any way to combat this?

The flowers are still present and look healthy, the leaves arent showing any other signs other than a slight curl in the leaves, im going to put this down to excess moisture and over watering.

I put a stake in this morning to see if the soil was wet at the roots and it came out dry on top but wet further down.

Ill avoid watering and hope they come alive ha, new leaves are forming every day so can't be too badly affected
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Charles_Dimmock
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PostPosted: Tue Jun 22, 2010 12:05 pm    Post subject: Reply with quote

I found this:

The exact cause of tomato leaf roll is not fully known. Tomato leaf roll appears about the time of fruit setting. The leaflets of the older leaves on the lower half of the tomato plant roll upward. This gives the leaflets a cupped appearance with sometimes even the margins touching or overlapping. The overall growth of the plant does not seem to be greatly affected and yields are normal. This condition appears to be most common on staked and pruned plants. It occurs when excessive rainfall or overwatering keeps the soil too wet for too long. It is also related to intensive sunlight which causes carbohydrates to accumulate in the leaves. Some varieties of tomatoes are characteristically curled.
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