Plant Disease Problem

Got a plant disease problem, there are definitely no bugs (I have checked thoroughly).

Looks like orange spots that spread from leaf tip to the rest of the leaf. It works its way up the plant, and spreads from plant to plant.

I have a shelf grow, six 40W daylight fluorescents for veg. Young plants on same shelf as a huge mother are much more affected than mother, so it seems that mature plants can fight it off (and some better than others).

Any experience on how to deal with this?

My plan is to attack with dilute soap spray one day then neem oil spray and systemic the next day and repeat. Will keep you updated.

I don't think it's a disease
Looks like a mag deficiency to me.
what is your PH and feeding schedule?

Those Leafs look very simlar man. Is that like a 2ft plant and only 1 or 2 leafs doing that. If so i have same problem my 2 fucked up leafs are still stong enough to stay on the plant its been like 3 week or 4 since they were fucked up. Just use distilled water. Try to skip the ferlizin 3 out of 1 waterin. I got 2 go. Wish U LUCK MAN

not a deficiency, esp not mag bacause they're getting plenty. Ph 6.5 and fed advanced nutrients micro and grow at half dose twice a week in soil. Plain water twice a week too.

Not many threads on plant disease, so im sure this is a bit strange. I think it staarted with some fungus/bacteria that made my perlite pellets turn yellow.

i just changed from fox farm to gh nuets. now my plants look like that and its slowly working its way all the way up the plants. any advice would help. this is my second harvest and i didnt have this problem before but was using differant nuets and in soil instead of 1/2coco core and 1/2 perlite as a medium.

i'm having this same problem except further advanced and i can't pinpoint the problem either.

sinister said:

i'm having this same problem except further advanced and i can't pinpoint the problem either.

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I am no expert but my guess is nut burn. I recently 1/2 dose nuts and they burned em. 1/4 dose worked prior but not 1/2. I'd say flush and water only a couple waterings. Then try 1/4 nuts. If you have multiple plants try 1 with 1/2 nuts so not to harm em all.

smokering, any developments???

if he kept watering 4 times a week they proly died.

Sorry that was a while back... and I can't remember all the details. I think it might have been one of those things where you just have an unhealthy plant, like you overwatered it, had nute problems, and some bacteria too! The plant was not happy, but I did successfully flower it! I think I finally took a minimalist approach and let the plant tell me when it needed water and nutes and everything worked out. Oh, and if you have never realized this, stirring the top half inch or so of soil every day is an amazing way to prevent fungus/bacteria in your perlite (which attract bugs and probably promote diseases too).

yo thesmokering just reaf this thread and my plant is suffereing from a similar problem except its really dangly, not even droopy, like the leaves look like theyre dangling. If you remeber would flushing do anything for this plant?

In soil, definitely do one good flush, then let it dry however long it takes. When I flush, which I do for almost every watering, I add fresh nuts at the end and then a bit more water after to let the nuts sink in. Then I wait till it dries a bit and stir up the top of the soil to a finer sand that has a lot of air in it, this helps oxygenate the soil as it dries.