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Leaf curling/distortion in Tomatoes.
http://byap.backyardmagazines.com/forum/viewtopic.php?f=3&t=22975		 Page 1 of 1
Author:  dasboot [ Sep 16th, '14, 15:56 ]
Post subject:  Leaf curling/distortion in Tomatoes.
Anyone know what is causing this,i have done the goggly thing but i am still not sure what the cause is,plants were normal until very recently,but because of the move about they have just been allowed to grow as they want.This is the second time this has happened,the last time we had Temps of 35c and above so i thought it might be that.They are in constant flood media beds,water is 3cm ish below the surface,PH 6.5,nitrates 25,water temp 27 air temp highs now under the black 50% shade cloth of 33c.

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Author:  Snags [ Sep 16th, '14, 19:05 ]
Post subject:  Re: Leaf curling/distortion in Tomatoes.
could be leaf curl virus
Author:  dasboot [ Sep 16th, '14, 21:04 ]
Post subject:  Re: Leaf curling/distortion in Tomatoes.
Snags wrote:
could be leaf curl virus


But which one.. :think:
Author:  cookie [ Sep 16th, '14, 21:13 ]
Post subject:  Re: Leaf curling/distortion in Tomatoes.
is it on new growth as well..?
Author:  cookie [ Sep 16th, '14, 21:22 ]
Post subject:  Re: Leaf curling/distortion in Tomatoes.
if it is.. it definitely looks like calcium deficiency. the lower leaves on the plants should not be curled if it is calcium deficiency.
Author:  dasboot [ Sep 16th, '14, 22:58 ]
Post subject:  Re: Leaf curling/distortion in Tomatoes.
cookie the leaves look like this on the whole plant.the new growth not so much,some of the leaves are literally folded in half downwards some are just curled upwards,the ones folded are downwards,no other plants in the garden show any deficiency,the Aubergines which i think are the same family are fine and growing strong.
Author:  cookie [ Sep 16th, '14, 23:05 ]
Post subject:  Re: Leaf curling/distortion in Tomatoes.
den can really be a virus..
Author:  dasboot [ Sep 17th, '14, 00:46 ]
Post subject:  Re: Leaf curling/distortion in Tomatoes.
cookie i am pretty sure its viral i just wish i could pin point which one,the tomatoes yellow leaf curl if as its name suggests yellows the leaves along with the curl,its not that as the leaves are still green,so it could be Mosiac....i think,i would like to know so as to identify it in the future.
Author:  DutyDan [ Sep 17th, '14, 02:09 ]
Post subject:  Re: Leaf curling/distortion in Tomatoes.
Dasboot, if you see any white flies, it could indicate Tomato yellow leaf curl virus (TYLCV)

But I think it's more environmental. Since you're in Thailand, its hot and wet. This article

http://www.clemson.edu/extension/hgic/hot_topics/2008/05tomato_leaf_roll.html

says it could be caused by the excessive heat/moisture/nitrogen. But it also says fruiting should be unaffected? :dontknow:
Author:  Snags [ Sep 17th, '14, 08:35 ]
Post subject:  Re: Leaf curling/distortion in Tomatoes.
I would hang on until fruit starts forming
If its ok keep going, if its crap pull the plants.
Author:  dasboot [ Nov 3rd, '14, 07:01 ]
Post subject:  Re: Leaf curling/distortion in Tomatoes.
Update on this,i am pretty sure now the leaf curl was environmental,i pulled that lot and started again but this time the tunnel is more of a shade house.50% black shade cloth over the top of them,50% green facing the sun at the front,temps inside haven’t gone over 30c,fingers crossed no leaf curl.
Author:  Samuel L Jackson [ Nov 3rd, '14, 10:18 ]
Post subject:  Re: Leaf curling/distortion in Tomatoes.
dasboot,

my tomatoes do this too sometimes. I'm still not sure why. But they look great today so I guess it's not a deadly virus
Author:  dasboot [ Nov 3rd, '14, 10:58 ]
Post subject:  Re: Leaf curling/distortion in Tomatoes.
Half the problem with a lot of this is the learning curve/trial and error of things until we get it right within our situations,on the last lot i had temps above 35c,but i thought the Toms needed full sun.This time i went the other way and shaded them,when they were young they did look for the light as did a lot of the new plants,but it hasn’t hindered growth,could be the black 50%,which does soak up the heat,is just border line right for this situation.....
Hasn’t stopped the F in bugs though,i don’t understand why they haven’t thanked me yet for giving somewhere nice to have a picnic....
Author:  dasboot [ Nov 3rd, '14, 11:03 ]
Post subject:  Re: Leaf curling/distortion in Tomatoes.
SLJ do you know what your Nitrate level would have been if you had leaf curl ?
Author:  dlf_perth [ Nov 5th, '14, 18:33 ]
Post subject:  Re: Leaf curling/distortion in Tomatoes.
on the leaf curl, maybe try shading if in open sun. Some AP systems and GM can get quite hot


<but i thought the Toms needed full sun>

that is the general hassle with horticultural notes, they probably do if you live in Melbourne, UK etc...

here in Perth for example everything seems to be much happier with a bit of shade for 6 hotter months of year.
(just shading AP and other garden bits here now and will go through to easter)

Many system photos tend to have shade as well and hydroponic vegies are inside hot houses that need to be vented or even airconditioned (water mist or actual airconditioners) in cases for temperature control.

I grow native tree seedlings and even they don't really like being in full sun...
in pots they need to be under shade through the hot months.
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