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UK420 > Cultivation > Problem Solver > Sick Plants
mentiras
I have had a bit of a trawl and found nothing similar if in fact there is a real problem.

Some (Lots) of the fan leaves on my plants in flower, seem to be losing colour to some degree or another.
Turning yellow from the veins of the leaf outwards, the colour slowly draining out until they eventually dry up an drop off. The falling leaves tend to be the lowest on the branches or part net-bound leaves.
This may be natural wastage to expose bud beneath but I do not know.
It will be a while before I can post a lights out pic.

Here a couple of badly adjusted lights on pics for now.Click to view attachmentClick to view attachment Temps have been around 26.4C, RH 50% lights on dropping to 18.4C RH 65% max lights off until I noticed Id knocked the environmental control off. Night temps have not dropped below 23.5C since. RH around 45%. That was between 36 and 48 hrs ago.

How long the fan overide and heater were not working I do not know initially put night temp drop down to autumn weather.
Have seen a bit of greenness return generally but still the yellow vein thing seems to persist.
Any ideas?
Cheers mentiras.
mentiras
I am yet to return to the patch for a lights off picture of the problem.

I have potentially discovered the cause. Me.

I have recently been working with a couple of machine tools aaaand have got oil etc ingrained in my fingers atm.
This may have cause poisoning of various leaves I have been touching whilst inspecting them and consequentially the ones surrounding them.
It's possible some may have been transferred into my watering can whilst mixing feed up too, causing the first big yellowing. Timing would seem to correspond with the work-ish.

It was Andy Potatoes replying in Scribbles aluminium thread that got me thinking. Something about even invisible amounts of mineral oils are totally poisonous. Could be I have further evidence of that claim.
It took a couple of hours to sink in but amongst my other sins it might account for the state of my plants.

I am going to use gloves for a while, at least until my nails and fingers are clean, and see if there is an improvement.

Back with pics soon.
mentiras
Ok finally the same leaf Click to view attachment the problen one is pointing towards bottom of screen and has a healthy example pointing upscreen.
Any other leaf damage is probably at my hand during training.

Night temps 23.5C. 49% RH
mentiras
Click to view attachment This is a general shot, I did these from total darkness so not entirely the best shots ever. If you look at the very pale leaf in the lower right of frame I think you can see the colour loss is from the veins first not between like mg def.
Similarly a return to warmer nights appears to have restarted blooming.
I will need to check properly later but things may have taken a turn for the better.

Because I have not mastered photo manipulation I am going to post another general shot in the next post just to give a better idea of extent
mentiras
Click to view attachment Looks like the colour is returning to the worst affected leaves in this pic.

Maybe it was a combination, oil and cold.
I do not want a return bout to deal with so clean and careful from now on.
Will post an update in a couple of days.
mentiras
Click to view attachmentThis I think looks like the limit of the die back, you can see the canopy has mostly disappeared in the worst affected area.
It's a very odd pattern of die back.
Everywhere else things seem to be getting back to green.

A combination of cold and poison it would seem. wink.gif
mentiras
Click to view attachment Just a quick half happy update.

This is the result so far, everywhere else things appear to be perking up.
I am being as clean and careful as possible.
Hopefully the hole will not get any bigger.

A hard learned lesson even if it stops there.
This is what the other side of he plant looks like...

Click to view attachment
speedemon
Glad you solved it mate I saw this post when it was new but did not not know what to advise even with your cool blue pics smile.gif But like most probs with these plants they can resolve with time and trying everything smile.gif
mentiras
Cheers Speedemon, haven't solved it. cry.gif
It's been getting worse and perhaps even spread to the neighbour.
Had a bit of a brutal hack to try and limit further contact

I have, maybe rashly, amputated the worst affected bits of the original plant.
The poison/ problem seemed to show along 2 branches which have gone.Click to view attachment

If you look carefully at the branch as a whole, the various sub branches had begun to shrivel and turn brown.

I am in the process of flushing 15 ltrs of clean water through the roots using a different can and mopping up lots.
I 'm thinking if it's anything watered in a good flush might help.

At this point I could really do with some input.
This is well beyond my experience and I'm just trying to respond logically and eliminate probable cause.

mentiras
The gap's not very pretty at allClick to view attachmentgutted.

E2a If you look around the margins of the hole there seems to be evidence of more wilting leaves.
What travels like this?
mentiras
I've just flushed 20ltr clean water through the amputee all together and another 14 through her neighbour just in case.
I then put 7 ltrs feed through the neighbour.

I decided to leave the poorly one without feed and just see what happens.

Lots of mopping up mostly but I'm at a loss so am trying to remove all possibilities, excess nutes included but that would not seem to be the case as the first 7lts of water through the sick plant came out almost clear.
The watering can and mop cloth have been changed, I have removed pot covers and will bleach those before putting any back on too. I have even changed the feed measure.

Hopefully all will be back to lushness before weekend.

If anyone has any ideas or suggestions please say.
Have not seen any creatures in/around/under the pots or plants, even with the flood treatment to flush em out.


speedemon
Sorry to hear again mate that it's now not resolved and a free bump in the off chance somebody on here can help you??
mentiras
Cheers SD. just having a look myself.

No clue anyone?
Will update plant conditions again later.
The Villain
What a fookin shame m8 sad.gif
I really dont know what to say, I keep thinking nute spillage on them ?? orrrrrrrr maybe, chaeck your ceiling to make suure theres no condensation above where the damage is being done, I had this problem when I first set up my stealthed room, I had left a gap between board ans insulation and I was getting drops of water fall on my plants. Maybe way off the mark mentiras, but worht a check smile.gif

V
mentiras
Cheers V bud, I want to give them another day to recover from the flood and see how they are.

I don't think it's a condensation/spillage thing.
All watering/feeding goes on below canopy so not much chance for nute splash.

The space itself has four x one inch layers of kingspan overlapped and crossfixed for roof and walls then the inside layer painted white and I silicone sealed any unwanted remaining gaps. Not a lot of opportunity for condensation.
I was more than a bit tin foil hat, command bunker, orientated when I finally decided to go for this.

My enduring thought is, I remain the dirtiest, most unclean, thing to visit the room.

I have not seen any def pics that are vaguely like the worst affected leaves I have and the pattern of yellowing leaves on the plants is very random with the exception of the amputated bit and I did inspect that whole area quite thoroughly for insects/parasites before it had its major wilt.

I've seen the expected life return elsewhere due to the 'warmer nights' enviro thing, this problem too, I am sure, is also me centric.
My last peek was cause for some optimism but I have been there already so unless there is marked progress or deterioration, next feeding will be next update.
Observation is the best thing for now I think.. I have done enough damage.

If my hands have been transmitting a small but steady amount of oil/poison via touch directly to individual leaves maybe it has taken a while to build up concentration before showing any major systemic effect like the branch wilt.
Might answer some questions, just not quite sure how to exclude myself just yet. rofl.gif
lez
QUOTE (mentiras @ Oct 16 2009, 07:53 PM) *
Cheers V bud, I want to give them another day to recover from the flood and see how they are.

I don't think it's a condensation/spillage thing.
All watering/feeding goes on below canopy so not much chance for nute splash.

The space itself has four x one inch layers of kingspan overlapped and crossfixed for roof and walls then the inside layer painted white and I silicone sealed any unwanted remaining gaps. Not a lot of opportunity for condensation.
I was more than a bit tin foil hat, command bunker, orientated when I finally decided to go for this.

My enduring thought is, I remain the dirtiest, most unclean, thing to visit the room.

I have not seen any def pics that are vaguely like the worst affected leaves I have and the pattern of yellowing leaves on the plants is very random with the exception of the amputated bit and I did inspect that whole area quite thoroughly for insects/parasites before it had its major wilt.

I've seen the expected life return elsewhere due to the 'warmer nights' enviro thing, this problem too, I am sure, is also me centric.
My last peek was cause for some optimism but I have been there already so unless there is marked progress or deterioration, next feeding will be next update.
Observation is the best thing for now I think.. I have done enough damage.

If my hands have been transmitting a small but steady amount of oil/poison via touch directly to individual leaves maybe it has taken a while to build up concentration before showing any major systemic effect like the branch wilt.
Might answer some questions, just not quite sure how to exclude myself just yet. rofl.gif

mate i sufferedfrom off gassin and as i am totally of it check it out as im too fecked to explain (friday an all) but just check it .....................................may help ya.....said may................... oh do not feed if you think it is or you will lose more
mentiras
Cheers LEZ, really appreciate the input.
I did a bit of research but don't think off-gassing is the problem.

I have been observing and trying to keep my hands to myself, results seeming to be......
I am yet to catch this in the dark to photograph but the spread of destruction appears to have stopped.

The amputee is looking much better, the gap will appear as soon as I can grab a couple of pics.
Since last post the temps have not been below 21.5C or above 27.5C, I have seen a max of 52% and min of 46% RH.

When I was last in 26.1C and 46%. so enviroment pretty good, inlet temps around 21.5C.

Luckily I have a couple of boxes of rubber gloves handy, the plants seem to prefer them to contact with mineral based oil products. wink.gif

I can find nothing else potentially sinister, other than perhaps the twine I used for making the nets up.
Twine bought from a retail chain, specifically for garden use, was used for this purpose so that theory is very unlikely and I would expect wholesale destruction, not random areas, if that was the case.

All have been fed and I have see positive improvements everywhere else with no further deterioration in the worst affected areas.

It may mean we have a solution to the original problem and a serious warning about personal cleanliness.
All well and good keeping your space spotless but if you visit wearing overalls or work clothes with unwashed hands
you may be unwittingly signing a death warrant.

Hope this is a useful warning for others, be careful out there, keep it clean, keep it green. cool.gif

mentiras
Well the most recent news is the wasting of the plant continues.
I am going to feed the others and then re flush this once more in a last ditch attempt to save the thing.

If after this latest action the poison continues to spread I will be forced to chop the whole plant. sad.gif

I can only guess at poisoning and the flush just held the dieback up for a couple of days.
mentiras
Here's the gap just after the first flush,Click to view attachment when I went to check, the wilting had contunued to worsten in the areas to left of frame, so much so I amputated another rapidly dessicated branch.
mentiras
Still haven't got my head round resizing so one at a time and taking pics from pitch black are awkward.

I will try and get in 5 mins before lights on to catch some better ones as non of the close ups show much and are as out of focus as this, Click to view attachment until then, I just hope whatever it is stops destroying at this plant. I am worried as some of the others are not the colour I would like either, they too seem to be losing colour and yellowing from the veins rather than from between.

At this point I am tempted to hack out some of the strings of the net and remove it. Just to see if that is the cause.
I'm not really sure how her neighbour will react to loss of support if I cock up 'de-netting'.

I think I am getting a bit desperate sad.gif

I cannot place anything else as even probable cause after my own admission of adding oil/ grease/filth to the environment.

Certain it is not fungal. Sure it is not parasitic, checked using a telephoto lens as a magnifier, could see no beasts or bugs.
I would prefer it to have been my, shall we say, absentmindedness in not noticing the string was impregnated with something poisonous, say something bitumen based, remove the net and hey presto, bounce back.
Would anyone else consider this a likely cause?
I expect if it is, I will be using some inert rather than organic material for nets next time.

Has anyone had a similar problem with the string they used to string up their nets?
mentiras
Click to view attachmentClick to view attachment Have a look at these and see what you think. The random, dried, crispy leaves are a new and recent feature, less than 48 hrs in the making in this particular area.

Is the discolouration of the stem in the middle of the first pic normal?

Being an emotional idiot at times, I foolishly did not take a picture of the branches as I removed them. Those parts that have not already been disposed of are having a quick dry before I try and salvage something from this disaster.

I may or may not post pics of these depending on how representative the remains are.
I'm still positive it was me.
vardy
Hmm ide love to know the answer to this little dilema, i noticed on some leaves theirs a lil bit of leaf mutation going on which could be too much nutes, and really close on the bigger leafes theirs little light gren spots, ide deffinatly check the leaf under a microscope to see whats happening here could be a combo of things hmmm can't wait for a solid answer to this one! goodluck hope it gets sorted yinyang.gif
mentiras
You n me both, really can't see insects though I havn't gone to microscopic levels.
vardy
Ide have to be straight down to toys 'r' us in the kids science section picking up a cheap microscope! lol.gif, how long has she got left until flowering is fin did you say?
mentiras
Not sure, best came down day 75 last time, I left 1 another week to see the difference but that only seemed to gain volume rather than weight. The pics are day 56/7ish.
speedemon
Nobody seems to know what is up with these plants and it does not seem to be getting any better maybe it's time to cut your losses and crop now and try again with a whole new batch smile.gif??
mentiras
Well, SD, erm, yeah, a last look.

I have released it from bondage and grabbed a few shots on the way be patient and I will have learned how to resize by my next problem thread, in the meantime, temps 27.1C with me busying around messing about with circulation fans whilst I cut the net out. RH 50%.

Ok.Click to view attachment leaf,

Branch Click to view attachment it is horrific how fast this is happening.
mentiras
Click to view attachmentDamage Click to view attachment Finished.

I'm gonna post a whole plant pic next just to give some idea of scale.
At this point about 2/3 the plant has already been lost.
mentiras
Click to view attachment Here's the full scale disaster.

Finally what most of the bud looked like before whatever struck me babe down.

Click to view attachment

I had a last idea about impregnated string releasing stuff on being exposed to higher levels of ligh/heat so have removed the net from the neighbour too.

I'm inclined to give her one more night untethered to see what occurs.
Would be nice to pin it to something.

I will post 24 hrs from the last pic and if there is more visible damage, I will have to take her down sad.gif
mentiras
Well folks, yet another branch has begun to dry up so I have no choice.
It's giljotiini.gif time just not a happy one, should get a couple of pipes off her if I act quickly.

I will however post a pic of the rootball if I find anything fluro pink roots, small rodent or badger you know, that sort of thing, hoping this does not afflict anyone else, mentiras.
mentiras
For anyone who looked, puzzled, posted or ignored this problem. The Cause + Solution(s) However unlikely seeming.

Much though I could not get to the root of this problem and gave up, thinking I had poisoned the plant with oily hands, to my surprise I discovered the real culprit during trimming.

High Velocity Air, as expelled repeatedly, for irregular periods, at consistent high speed.......

Did ya guess what it is ?
Fekin active air inlet, every time it was overheating or too humid in the room, that exact area was getting a blast of high speed cold air.

It only dawned because I was sat in the same place as the plant whilst trimming and noticed the effect.

I'm thinking about making some sort of diffuser thingy to stop it happening again.
Until then nothing will be put there or the outlet much more carefully directed.

All I have to do is remember now. spliff.gif wink.gif
Ragingbull299
thats some bad news mate sad.gif i was starting to think it was the garden string you was using for the net, but at least you found out the real reason and can sort it out before you get some more going.

best of luck
mentiras
Cheers Rb, I actually see it as good news now.

I believed the string thing myself and saw improvement after removing the nets but sitting in the same place getting a cold blast every so often, to a point of being uncomfortable was the pointer.

The ventilation system is set to run full power until temperature or humidity is restored to set levels, it means you get a blast at irregular intervals but directed in exactly the same place.

I put a blind in the path of the blast after chopping sick girl and de-netting the others to reflect a bit of light and reduce the space so I thought I had cured them for the wrong reason.

I am pretty sure of myself for once, it's a six inch inlet fan and is quite a blast at full power. You just don't notice stuff like that unless you sit around for a long time and it's not recommended because of the lights.

peace thumbsup.gif
mentiras
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