Anyone knows what this problem is?

[Terramoto]

The is the one on the middle getting a bit brownish, this happen after i gave them water and spray with neem oil. There's only two visible possibilities: the roots got damaged by the chlorine in the water (weird cause i let it sit more then 24h before i water them) or it was the neem oil (how can top sprayed neem oil influence root system?) either way last time this happen all plants turned white and died.

 

[krunchbubble]

pic dont work

 

[wilbur]

would have to be very much chlorine in water to affect roots, I think. would affect leaves first.

sounds like neem too strong. how much was neem diluted? 70% neem needs to be diluted 200:1!

what reason did you spray neem?

 

[Terramoto]

how can i cure them?

 

[stc9357]

No pics

 

[Terramoto]

i can see the image anyway here's the link:
http://s15.postimage.org/in6mwslfe/23042012120.jpg

 

[Purple Buddha]

Neem sucks...looks like you have a few problems going on there. Best of luck bro

 

[Terramoto]

yeah and its not the first time, im going to stop using this s... Anyway i fix this?
tks bro!

 

[singingcrow]

Hey, so my first though on reading your post was that it sounds like the been oil prevented your leaves from photosynthezing your light and faded, causing the plant(s) to die. This could, hypothetically, happen but it takes a while. Plants dont just die overnight if they had been big enough to have established roots. After looking at your pic it seems like this was not the problem. They look like they have nutrient burn. The tips are either cruelty and dry, or around the leaf edges are yellowed and brown. Thus is usually nutrient burn. You didnt mention your feeding method, so its hard to say, unles you want to reply back with it. I would say dilute your neem oil, cut back on nutes, let the plants dry out in their soil and then water with distilled water or RO water for a week or so. When you return to nutes, do it at half the amount you are using for a week or two, then increase it slowly and don't use too mych of a high nitrogen product if your garden gets above 85f. This shoild dolve most of your problems. Good luck!

 

[stihgnobevoli]

i would say overwatering. your leaves are all cupped and yellowing, i see a phosphorous def. if its not overwater which im almost 100% sure it is, then it might be you aren't feeding enough highly doubt it, or your pH is off, which is my second guess behind overwater.

1.) let it dry out if it is overwatered / soil moist and cold

2.) check the pH after you water it next time. the pH of the water coming out.

3.) if thats not the case, feed a little bit 1/4-1/2 strength

 

[Terramoto]

actually i started to feed them 1 week ago because the soil is new and came with nutes and the plants started to get less green, usually when i use this soil on other clones it tends to burn a little, also that might be because i got the clone out of the cloner a bit late. That leaf you see is from another plant that has more marks then the one i was talking about (those are two different cases) the one im talking is the middle one with the dark green/brown mark on the leaf. First clone i saw that thing happen it lost strenght from half stem up, after i saw that i "flush" the soil with water because i thought the oil was affecting the root system, next day the plant had the strenght back but the leafs had that dark green/Brown marks on the leafs. My guess is that neem oil wasnt well diluted and the plants ended up absorbing it unabling them to get water on the top?

Btw, the new leafs on the one you see with burnings are well.

 

[stihgnobevoli]

yeah i was talking about the one in the middle with the leaves that are brown all along both sides of the middle. unless it was resting on a hot bulb, that's phosphorous deficiency and if you have been feeding already then the soil is either too wet or the pH is off, i believe low pH locks out phos. actually its too high or too low. phos is best absorbed in the 6.5-7.5 ph range.

 

[Infinitesimal]

i second that motion

i too was thinking phosphorus def when i saw the pics

dry out, water well, and feed at the second needed watering maybe foliar some chem nutes while the medium dries out but yeah theta brown is usually a K issue. if you've been feeding you may have locked the K out

 

[Terramoto]

wouldnt it normally dry the leafs while the problem graduates? those leafs are kinda mushy, i cant overwater this plants because the soil doesnt let me, i have to water them everyday or it dries out. I have those plants on 1L pots, if i water them with more then 0.5L (+-) the water just leaves through the holes beneath the pot, normally when i check them everyday the soil is "dried" considering i've just watered them a day ago. On last year's run i used to drawn them on a pool of water and i would feel the difference between dried and watered by the weight, but with this soil/pots/clones when i water them i dont feel a big difference in the weight.

As you can see on this thread one of the plants ended up "half broken" like those, but the next day it got better and raised again, but the leafs are still mushy. Wouldnt lockdown dry the leafs? or start the damage from the bottom to the top? this plants started to get sick on the big leafs first and then the nodes. Anyway ill check the PH on the water and the tds on the flush water.

Thanks for your input!

 

[stihgnobevoli]

are you sure it's not that the soil is just really compacted in some spots and not getting wet? dry peat and soil based soils can be hard to wet for a while. gotta water a tiny amount, let it soak in and break the surface tension, then a little more and a little more till its all wet. if you pour the water in and it comes running right back out, i can guarantee you that the soil isn't wetting evenly and you will run into problems.

 

[Terramoto]

heres a picture of the same leaf taken today

from what im seeing doesnt look like nute burn or ph since the yellowing isnt spreading from the middle or from the border its just random, now what i think it might be is, the plant absorbed the neel oil and with the CFL improved the UV burn. Now, i dont have any understanding of biology and this is only my opinion, im just looking for answers. Other plants i have here dont have those marks with the same time/pot/soil/nutes.

 

[stihgnobevoli]

got a combination of things going on there, can i see the whole plant? those leaves look burned by the lamps in the last picture. how come that one is so clear and the earlier pictures were so blurry? take a picture of the plant by itself like that one real clear so i can see it.

 

[Terramoto]

they are all from the same plant, yesterday the leafs were mushy, today they are Crispy.

 

[Infinitesimal]

different deficiency's, toxicity's, and lockouts look different and can change dependent on the compounded issues. so you can't say because the problem is happening from the top of the plant-down, or leaf tip-in, or bottom-up its not a deficiency. diagnosing plants is much more than looking at them at being able to tell whats wrong. its having a good understanding of how the plant uses the nutrients and how they move throughout the plant. i recommend the marijuana garden saver book, not so much to troubleshoot when you have a problem but to study and learn about the nutes and it make this all more understandable. Is that dark brown crispy?

 

[Infinitesimal]

what are your temps? how close to the light are they? cause the leaf pic at the top does look scorched, looks like there's a lot of things going on here