what is this

[marjngrws]

i'm not sure what this is on the leafs please help 4weeks in.

[GaGrown]

Look on the underside of that leaf with a magnifiying glass.See if you got critters moving around? Spider mites.Not 100% sure though,pics kinda fuzzy!

Ga Grown

[marjngrws]

no spider mites

[hotchi]

kinda looks like it needs nitrogen. im not 100% on this.
try and give it a dose of fish emulsions

[latewood]

1st I agreed with gagrown...but, I got my Indoor bible out; As I do about everyday...It is good to read your bible!

After a little research, I thought it might be a magnesium deficiency...but no, It looks like a leaf spot fungus, and possibly a nutrient imbalance of sorts.

Q. have you been foliar feeding by any chance, and if so, with what?

lw

[Jdog7000]

It could be nute lockout.
What is your PH?
Thats not Mites.:thumbsup:

[stinkyattic]

I agree that the likely culprit is fungus. That blotchiness is too irregular for N or Fe chlorosis. So don't add N. Anyway that would be inappropriate at this stage because I see that you are in flower already- you say 4 weeks in- so you have 4 weeks left.

With buds on you have fewer choices for fungus treatment, but you can try Serenade or another bacillus subtilis product. Serenade is sold at WalMart.

It is somewhat expected to see old fan leaves yellowing near the end of the flower cycle anyway as the plant uses up its N reserves.

Control the fungus, finish your crop, and be sure to bleach down everything before your next grow. Be aware of your soil pH because a sickly, stressed plant will be less able to resist fungal attacks. Potassium deficiency can do that too.

If by some chance that is a virus, you have a tougher problem. There is no cure for viruses and the plant should be destroyed. Or you can let it finish but be SUPER aware of insects, as they can spread the disease to a healthy plant. Put up sticky traps.

At least you are almost done with the grow!

[busteruk7]

here dude check this link out it might help ya sort out ya problem
http://www.geocities.com/nutrientproblems/
cheers all :)

[orangeman]

here dude check this link out it might help ya sort out ya problem
http://www.geocities.com/nutrientproblems/
cheers all :)

Thats a nice link, thanks that should help with alot :D.