Can you help Identify

[Smokes101]

Alright. Well i can't tell if this is a problem or not, but i'm getting brown spots on some of the leaves that are starting to yellow. I'm in week 5 and i'm unsure if the leaves are already starting to drain themselves, a ph problem or an infestation. There are gnats that circle around the lights but i put up fly paper, kills alot of them. Anybody have an idea?

Smokes101 Reviewed by Smokes101 on 10-23-2008. Can you help Identify Alright. Well i can't tell if this is a problem or not, but i'm getting brown spots on some of the leaves that are starting to yellow. I'm in week 5 and i'm unsure if the leaves are already starting to drain themselves, a ph problem or an infestation. There are gnats that circle around the lights but i put up fly paper, kills alot of them. Anybody have an idea? Rating: 5

[Revanche21]

I'm not an expert but looking in my Jorge Cervantes book, it looks like a later stage of Potassium(k) deficiency?

If the yellowing started from the stem area and spread to the tips it could be a Iron (fe) deficiency

all of these deficiencies could be due to pH problems as the nutrients may not be properly took in by the plants

here's a ph Chart someone else posted elsewhere

[Smokes101]

I'm checking ph level every morning i feed but I want to make sure that it doesn't look like the gnats are moving in on my stash hehe...just getting paranoid...hear they feed on all fruits..:jointsmile:

[Weezard]

I'm checking ph level every morning i feed but I want to make sure that it doesn't look like the gnats are moving in on my stash hehe...just getting paranoid...hear they feed on all fruits..:jointsmile:

Aloha Smokes

Sounds like you have some Fungus Gnats there.

The Gnat themselves don't molest your plants.
But, they lay eggs on the soil that hatch into larva, that DO eat root hairs.
This can kill seedlings, Older plants will survive but yeild will suffer.
No pest strip will kill the adults and the larvea will pupate, hatch and die as well.
Suggest you get right on it, they spawn in waves.

Best of luck,
Weezard

[Smokes101]

any suggestions on how to take care of the problem? I'm looking em up but maybe you know?

[Wobster]

Putting a layer of sand on top of your soil will stop the fungus gnats from bieng able to burrow and breed under the soil. You just have to water them gently afterwards to keep the sand in place and not wash it down into the soil

[Wobster]

There are signs of nute burn in the pics u posted but I dont know if thats the only thing.

[Revanche21]

I hear 'lollypoping' helps with bug problems as you can see the dirt and theres a good amount of distance between the dirt and the plant

[Weezard]

any suggestions on how to take care of the problem? I'm looking em up but maybe you know?

We use a no pest strip until 3 weeks from harvest to kill the adults.
And Wobster is right, an inch of white sand will stop the egg laying and reflect light as well

best Weezard.

[Wobster]

Fungus gnats are annoying and best got rid of but the damage on your leaves isn't caused by them. Getting rid of them is good but you still have a problem there.

Fill out a Troubleshooting form from the top of the forum and include anything youve done in the past few weeks eg) adding epsom salts. It looks like a plant that is locked up either by ph issues or a toxic salt buildup.

More pics and more info... include a pic of whole plant. Does the problem start at the bottom of the plant? Is it effecting the entire plant? Things like that are vital for a diagnosis