Fungus gnats

[buraka415]

@Jakenbake - hey I know we talked off another thread about killing gnats, specifically about using sand, in my case some beach sand. rem that? well, i did go and get some. washed it out, pretty good. I then only applied some liberally to a test group, and I didn't like the way that water/feeds just were sent barreling off the top. I guess I should have removed like the top 2" maybe? but even then, the water/nutrient mix would just stand and/or run off really easy.

I also, used Docktor Doom's fogger - which really fucked up some leaves/bud sites that got hit by the fogger - thats pretty much my fault, as I placed the fogger down between 2 tables on the floor. I've done this with other fogger's probably 2 - 3x and never had this problem. But even after the fogger, + the sand, I still have the gnats.

I picked up some azamax yesterday, and just foliar sprayed with the azamax, and am probably going to do a medium drench with it too. You think 2Tbs(30ml)/gal is good enough on the drench? How much water should be applied to each container? seeing the containers are 2 and 3 gals? Do they need a full 2qt's (which is my normal water/feed amount), or just a few ounces to each?

 

[jawbrodt]

^I had the same problem with the water/fert not draining through the sand, so I ended up scooping alot back out of the pots. I've found that a thin layer works just as well as a thick layer, and makes watering a little easier. It's still a bitch though. I had to water lightly, use a small stick to stir around the top of the soil, let the pots sit for a half hour or so, then come back and finish. The water drains great, once you got the top layer nice and moist.

ALSO,.....if I ever get gnats again, I'm going to use perlite, instead of sand. I read about someone else having good results with it, and thought it was a great idea, because it'd eliminate the drainage problems, if it works. Definitely worth a shot, IMO.

 

[buraka415]

my only issue with a big layer of perlite at the top is it floats - its light weight. I could see it just floating on over the top too. maybe im wrong.

 

[noxzious]

Do they affect leaves? Recently i been getting yellow and brown to orange speckles like dots everywhere on some leafs on only 1 plant though,

 

[Spanishfly]

Fungus gnats are VERY attracted to composts containing peat, but almost always only affect indoor plants. They are poor fliers and get blown away in the wind.

 

[Jakenbake]

@Jakenbake - hey I know we talked off another thread about killing gnats, specifically about using sand, in my case some beach sand. rem that? well, i did go and get some. washed it out, pretty good. I then only applied some liberally to a test group, and I didn't like the way that water/feeds just were sent barreling off the top. I guess I should have removed like the top 2" maybe? but even then, the water/nutrient mix would just stand and/or run off really easy.

I guess when I said I removed the top 1/4 - 1/2" of soil I didn't mention that the top of the soil was already about an inch below the top of the pot =/ I apologize for not being more specific. And although I do have more room on top to fill it up and let it sit, I don't have much of a drainage problem. I did put a light layer of gravel below the soil so my pots drain relatively easily so that might have something to do with it. And just a thin layer of sand worked for me, I wonder if adult gnats are just coming from somewhere else and finding your plant on a regular basis. The sand might still be working by keeping them from laying larvae, they're just coming in from somewhere..? Maybe? I dunno, something to think about I guess

 

[buraka415]

well i sprayed with azamax yesterday eve - gonna drench w/ the remainder of the solution tomorrow - since I'm watering/feeding tonight. seems like i would do the azamax to the medium after feeding - yeh?

 

[Cannabis patient420]

what kind off sand work ?

 

[Jakenbake]

what kind off sand work ?

I used a fine paver grade from Lowe's normally used for lying paver's on. It worked pretty well for me