leaves twesting full 360

[bitpoop21]

the new growth leaves one is twested all the way around corkscrew ? kind of yellow at base then dark green tips on the leaves.
I use advance nuts a&b and change the water evey 4 days rockwool ph 5.8

 

[sproutco]

Leaves shaped like a "pigs tail" = Copper deficiency maybe. Does the plant look like its wilting? Is the leaf surface puckered or smooth? Are most of the leaves really dark green or bluish green color? Does it look like the terminal leaves are going to abort?

Interveinal chlorosis occurs on young leaves, but unlike iron deficiency, the leaf tips remain green. More severe deficiencies result in the leaf blade tissue collapse as it expands. This results in very small leaves, which appear burned back due to desiccation. The burning symptom will affect a few leaves and then stop. After a few nearly-normal leaves appear, the burn can occur again.

This burning results in flags (not fags) which is a dead leaf on an otherwise healthy looking plant.

Copper deficiency can be brought on by a high amount of nitrogen or phosphorus.

You guys are working me overtime...



In case anybody is curious, this is where the quote came from:

Bedding Plants IV, A Manual on the Culture of Bedding Plants as a Greenhouse Crop
edited by E. Jay Holcomb
Bedding Plants IV is a technical resource book containing information from over 35 leading professional bedding plant growers. The technologies, production techniques, and marketing tips included in Bedding Plants IV are essential to keep growers competitive. Sponsored by Pennsylvania Flower Growers.
ISBN: 1-883052-05-X, 452 pages, 6 x 9 softcover, (c)1994

Excellent book!

 

[sproutco]

Since you have no pictures, check out the pictures in this thread and compare your plants. You both may be experiencing the same thing. http://www.icmag.com/ic/showthread.php?t=37701

 

[bitpoop21]

not like photo I use the the advance nutrients a&b it has everything in it and I change it often with ro water pig tail only one of the bubbas are twisting.

 

[sproutco]

Are you sure the ph is 5.8? You should try to use distilled water to test. There are directions in my signature for testing soil but I am sure you could use them with rockwool. Sometimes with manganese deficiency, the leaves will also roll completely over. What is the ratio of iron to manganese in the fertilizer? Describe the yellowing on the leaf better. Does it appear like the the veins are staying green including smaller veins giving the leaf a netted appearance? Does it look like the terminal shoot is going to abort? Are the leaves smooth or puckered? Are small necrotic spots beginning to scattter across the yellowed areas? And what color are they? Look at the underside of the yellowed leaf. Are their raised translucent bumps? Last curious question...Have you changed the lighting lately?

 

[stealthpackage]

When you say twisting, do you mean twisting or curling at the leaf tips? Twisting would be a good sign of a pH problem...

 

[bitpoop21]

I use advance nutreance it should have everything in it as it is said to be the best.
I did spray them with water because they looked like to much n ec .2 to .4 ph 5.8
I have the blue stick ec meter and octon ph meter with test sultion for both
it looks netted puckerd only on one yellow at the base of the leaves only new leaves
I change the water every 3 days

 

[sproutco]

ec .2 to .4 ph 5.8

That's a pretty low ec and probably a good ph. What do the roots of the plant that is showing new growth yellow look like? Root damage from too many ferts, lack of oxygen, pathogens, etc... can show up as a micronutrient disorder like simple iron deficiency sometimes. I know everyone has seen my stupid chart...

 

[bitpoop21]

roots are white and thick I use hydrogard they are still in 4x4x3 cubes and about 1 foot tall s1 bubba big fat leaves like diner plate the one with the 4in thick leaves looks fine but if I use the good ferts and change water often there should be no problums right? an ec of over .4 burns everything

 

[sproutco]

if I use the good ferts and change water often there should be no problums right? an ec of over .4 burns everything

FYI micronutrients are not perfect in alot of these store bought ferts. Sometimes they require adjustment to your growing conditions. What is the type of water you are using and what ec is it initially?

 

[bitpoop21]

ro water ec .00

 

[bitpoop21]

I found white larva about 1 mm long with tiny black heads in the roots nothing on leaves?

 

[sproutco]

Sounds like fungus gnats are eating your roots and causing a micronutrient deficiency. http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7448.html Consider using bacillus bacteria to kill them. Sold as mosquito dunks at stores like Home depot. Anybody got a rate?

Biological: Bacillus thuringiensis subspecies israelensis (Bti) (Gnatrol)

Comments: A naturally occurring, spore-forming bacterium produced commercially by fermentation. Bti applied at labeled rates provides temporary control and is toxic only to fly larvae, such as mosquitoes, black flies, and fungus gnats. Repeat applications commonly are needed for long-term control. This Bt is a different subspecies from that applied to foliage to control caterpillars. Bt labeled for caterpillars is not effective against fly larvae.