Hello all,
I have gnats in my grow room. Are these little guys a problem? Do they attack roots? I think I might have 1-2 weeks left before harvest. Should I treat the problem? Intuition says no, i dont want to smoke pesticide. I know i ask alot of questions... this is my first grow, a little high strung here!!!
Thanks,
MyBUDdy

Check this out..should take care of your problems..good luck

http://www.greenpassion.org/equipmen...html#post30074

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I may say or do things to get you to like me, that includes lie, cheat and steal. So i'm going to appoligize now if somethings I say or do turns out to be a lie. I may lie, cheat, and steal..BUT I WOULD NEVER BREAK THE LAW!!!!

I hate those little guys!

That should do the trick w/o chemicals. cool. Do gnats effect the root system at all?
MyBUDdy

Fungus gnats are more of a problem in the root zone.

With only a couple of weeks to go, I think the question would be, is $30 for a natural predator worth it to be rid of the buggers for only a week at most.

See:
UCONN IPM: Integrated Pest Management:Greenhouse: Fungus Gnats are Serious Pests

Try some "Steinernema feltiae" beneficial nematodes to kill the little pests, as they not only affect what you can see, but they also affect the root system. I bought a syringe of the nematodes from a nursery ( they had it stored in a refrigerator). Had to fill the syringe with water and squirt the soil to deliver them, and it worked. I recommend it.


Flystrips are nice to have but the nematodes nip the problem in the bugger's butt!

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As found in this great website Fungus Gnats, Shore Flies, Moth Flies, and March Flies Management Guidelines--UC IPM

All four flies develop through four stages as illustrated for fungus gnats: egg, larvae (four larval stages or instars), pupa, and adult. Fungus gnats, shore flies, and moth flies have many generations each year. Outdoors they are most common during winter and spring in interior areas of California. They occur anytime of year in moist coastal regions and indoors. Some species of March flies have only one generation a year. Each March fly species tends to be abundant during a certain season, usually spring.

Adults feed very little, consuming only liquids, such as water or flower nectar. The tiny eggs and oblong pupae occur in damp places where larvae feed.

Physical and cultural methods—primarily screening windows and doors as well as reducing moisture and organic debris—are recommended for managing all of these flies. Biological control agents are also available to control fungus gnats. Insecticides are used in commercial plant production, but are not generally recommended for control around the home. Most of these insects' life span is spent as larvae and pupae in organic matter or soil, so most control methods target the immature stages, not the mobile and short-lived adults.


There is also a product called Gnatrol. I've never tried but have heard other recommend it.

dont know..lol
I dont have a gnat problem

__________________
I may say or do things to get you to like me, that includes lie, cheat and steal. So i'm going to appoligize now if somethings I say or do turns out to be a lie. I may lie, cheat, and steal..BUT I WOULD NEVER BREAK THE LAW!!!!

First link doesnt work and the second just talks about gnats, which is cool to know about. I rather stop a problem before it starts, then worry about how to get rid of something. The pest strip does more than flies and flying insects. Best $6 I ever spent on pest control..fired the $30/month exterminator cuz it did more than he did.

__________________
I may say or do things to get you to like me, that includes lie, cheat and steal. So i'm going to appoligize now if somethings I say or do turns out to be a lie. I may lie, cheat, and steal..BUT I WOULD NEVER BREAK THE LAW!!!!

hot shotz for the win!

i got gnats too...went to walmart and bought a couple boxes of those yellow fly traps that you can hang. hung up about 3 or 4 of them. if a matter of hours i had a couple hundred snagged in the traps. i would get these...they are cheap and work. the adults get caught in the traps and that stops them from laying anymore eggs. no more eggs = problem solved.

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.: Let it grow, let it grow, let it grow :.GP 4 Life

Are these all in soil grows because once you get them they will keep comming back try feeding your plant from the bottom keep the top of the dirt dry that is were they lay the eggs and they need the dampness if it is dry they will not lay eggs. Those fly strips are great but I would say there is eggs in the soil and they will hatch and things will keep on going. Get some of those ground up sea shells its a powder cut there bellys all up that works. This is what I did and got that soil out after the grow.

dude im in hydro...your right too i cant seem to fully get rid of them. i have cut the problem in half at least with these yellow sticky fly traps but i know they are still hiding in my drip system

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.: Let it grow, let it grow, let it grow :.GP 4 Life

get some of those ground up sea shell and shake it around they will eat it and it cuts them up and they die.I used it it gets them all. You can put some in plastic tops around in your room they will find it.Peace