Perfect necrosis circles between veins on leafs

[TurboDog]

I am wondering what causes "dried out" light colored oval patches perfectly between vein. now in my picture it looks yellow but it is not. It is lighter colored green, just like how a leaf turns a little lighter when it dries. This is happening perfectly in unison between veins. This is not from bugs since it is PERFECTLY shaped ovals in THE EXACT same area on each leaf. I have searched EVERY forum on the net and cannot find one person with the same problem as these leafs. Please post if you KNOW what is wrong. I don't want to get a million speculations on cal/mag,ph,could be this, probably this. I need the plant doctors out their who know for sure, I don't want to go fucking with shit when it will cause more problems. ph is 6.0, RO water adn Im giving the plant light nutrients of Blue mountain organics 3/4 strength. is this a virus problem or something else? also, the effected elafs are random from top to bottom, couple leafs anywhere from the top to the bottom are effected. so its not locolized on one area of the plant.

Strain of Mj? cheese
Hydroponic or soil? soil
From seed or clone? seed
Age of plant in question? 4 weeks old and 12 days
What stage (Veg/Flower; how many days into)? 6 days flower
Medium (Soil, Rockwool, Hydroton etc.)? soil
Container/Pot size? 5 gallon air pots
Have they been transplanted, if so how long ago? no transplant
If soil, composition ratios (peat moss, perilite, vermiculite etc.)? sphagnum moss and soil
Water runoff Ph? dunno
Nutrients added? blue mountain organics 3/4 strength for bloom
Ratios of nutrients (N% P% K%)? not listed
Feeding schedule? when air pots are dry
When were they last fed/watered? today
How are you determining when to feed/water (weight, wilting, etc.)? got watering down, done enough grows to know
TDS/EC/PPM?-dunno
Tap/RO/Distilled water? RO water
Ph before and after adding nutrients?
Light intensity/Age of bulb/Wattage? 600 watts CFL
Distance to the canopy? 4 inches
Temps at canopy? 80 at tops
Temps at root zone or reservoir?-75
Day/Night temps (Min.-Max.)? night 71
Current air flow (CFM)? 171 cfm
Is there air blowing directly onto plant? nope
Using CO2? nope
Relative humidity? 40%
Growing technique (Scrog, Sog, Supercropping etc.)? fim
Has plant recently been pruned, clones taken, fimmed or pinched? nope
Pests? nope
Chemicals used to eradicate? nope

 

[Midnight Tokar]

You don't give anywhere near enough info for the "plant doctors" to give you an answer. You don't give any background as to your growing conditions as in the sticky form to fill out, that drawing is vague and could be many things but looks like nute deficiency which could be lock-out from PH issues, water logged or could even be hungry.........sorry

 

[TurboDog]

this is not a nutrient disorder since the patches are DRYING OUT. they are not discoloring as a indicator to nutrient disorder, hte plant is NOT watter logged and if it was hungry it wouldent cause these patches to dry out. you litteraly have to look at the plant up close to see the discoloration, the patches are just dry which changed the color to a barley noticble shade of lighter green. the patches are in unison and dry leaf area in a almost perfect oval. I would suspect nutrient disorders if the leafs were discolored in a ny way but the parts that are "sick" are jsut these dry patches, in the exact same spot on the effected leafs. its like a dry patch perfectly between veins and in the same spot on each inbetween vein area.

 

[Midnight Tokar]

After seeing your edited post to include the sticky info it looks like a PH issue. Find a way to check your PH, I have seen RO water PH from 5.5 to 7.5. I think if you could find a way to check your PH, especially the run-off you'll find your answer.

 

[Dorje113]

Sounds like leaf rust, caused by a Septoria fungus. If you post pics of your leaf it would be better, but your description is exactly what it does.

If your plant has it, it often will not show until you start to flower, then it will defoliate your plant to some degree before it stops again 5 or so weeks into flower.

I found some strains are affected more or less, many are completely resistant and never get it at all, but some do not have good resistance. Once your plant has it there is no cure. The more stressed the plant the more likely it is to get something like this, and a mite infestation will allow it to spread much faster because the spores will get into the wounds the mites make.

I have found NOTHING that works to stop it but copper (liquid copper or powdered copper sulfate) seems to slow it down and would be a good treatment for mother plants that you don't want to throw out. It can only be defeated by cloning from fast growing tips and keeping everything very healthy....

I got some plants that had this crap, and it is only a minor problem for the most part... unless you are monocropping a strain that is especially sensitive. Out of 30 strains I have now only a small handful have an issue with it and we expect to not see it at all next round as long as our clones stay happy.

 

[TurboDog]

thank you. I want to say from pictures it dosent fully look like what I have tho. Ill try to get some pics but I trimmed the effected leafs from her. The "rust" spots are not showing, just dry spots that don't really even change color. also from the pics Ive seen it dosent seem to have a uniform pattern for the septoria fungus, more of random spotting and spread on the leaf pictures I looked up on yahoo. My issue seems to not effect any of the veins of the leaf and is in the exact same pattern on the leaf and just "drys" the effected patches out, if that helps at all. it seems the septoria "kills" the leaf and discolores it and browns it. My patches are like if you jsut took a mini heat gun and just "dried" ovals into the leaf. YOu know how when you dry a leaf out it maintains almsot the same shade of color as before its jsut a little lighter do to no water being in it.

 

[Dorje113]

thank you. I want to say from pictures it dosent fully look like what I have tho. Ill try to get some pics but I trimmed the effected leafs from her. The "rust" spots are not showing, just dry spots that don't really even change color. also from the pics Ive seen it dosent seem to have a uniform pattern for the septoria fungus, more of random spotting and spread on the leaf pictures I looked up on yahoo. My issue seems to not effect any of the veins of the leaf and is in the exact same pattern on the leaf and just "drys" the effected patches out, if that helps at all. it seems the septoria "kills" the leaf and discolores it and browns it. My patches are like if you jsut took a mini heat gun and just "dried" ovals into the leaf. YOu know how when you dry a leaf out it maintains almsot the same shade of color as before its jsut a little lighter do to no water being in it.

I've found the rust can have a few different patterns and effects, what you described is pretty typical... rust usually is brown spots tho and not just dried out spots.

Anyway, I hope it is something else, plant diseases and pests suck.

 

[TurboDog]

thnaks, ye man. Im hoping it wont become a bigger problem. I got some new fert on the way that has fungi, endo and ecto bacteria and hoping it will help the plant fight off this shit.