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  #1  
Unread 03-16-2008, 12:00 AM
Senior Member
 

Join Date: Jan 2008
Posts: 195
Default What to do about gnats / flies....

I have a few orchids in my living room and I recently noticed a problem with gnats flying around my house.

Does anyone have this problem? What would you suggest I do?

About 3 weeks ago I sprayed my plants with horticultural soap, and most of them faired well but one of my phals didn't like it very much. The gnats went away for a little while, but now they are back.

Any suggestions?

Thanks.
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  #2  
Unread 03-16-2008, 05:43 AM
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Join Date: Nov 2007
Location: Sydney, Australia
Age: 42
Posts: 90
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I had them too, tried everything, the only thing that worked well was repeat application of dish washing liquid, every two weeks for 4 applications.

I might be wrong and the others might correct me but I just added the detergent with my normal dose of fert every two weeks.

I added 10 drops for every 2.5 gallon or ten litres.

The soap suffocates the adult and the baby worm thingy but doesn't kill the eggs.

I would use the horticultural soap (expensive )again or just use household dishwasher detergent (cheap ).

I am told it needs this every two weeks to break the egg - baby - adult fly cycle.

So I watered every two weeks with the stuff and they are gone after 2 watering but I kept going to make sure for two more for a total of 8 weeks.

For maintenance

My water application is 3 weekly watering with fert then 1 week of just a deep water flush to get rid of salts.

I now use 5 drops per 2.5 gallons to the fert on the week before the deep flushing of just water.
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  #3  
Unread 03-16-2008, 07:12 AM
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Dish soap has always worked well for me, also repotting.
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'A day without laughter is a day wasted'
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  #4  
Unread 03-16-2008, 07:25 AM
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Join Date: Nov 2007
Zone: 5a
Location: Springfield, Illinois
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Male
Default Another thing that will help

Is those yellow sticky pads.
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  #5  
Unread 03-16-2008, 08:19 AM
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Location: Avon, NY
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Just have a quick second before I leave for work, but wanted to take you a second to let you know what I did to fix my fungus gnat problem. There is a product called Gnatrol that you can get. I googled it quick and came up with this website, though I think witha little digging you can find a smaller cheaper jar of it. I picked up a pint sized jar last fall off ebay for about $8. This one on this site seemed a bit large and pricey to me. Would def cut into my orchid budget .....anyhoo, here is the link and happy hunting. Oh and its safe for the orchids. Gnatrol Fungus Gnat Control
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  #6  
Unread 03-16-2008, 08:50 AM
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The yellow sticky pads work wonders...it traps them and the adults can no longer create any offspring. Certainly cuts down on the population

You can use any type of yellow item to make one of your own...yellow plant tags smeared with Vaseline (petroleum jelly), yellow plastic plates and yellow plastic cups can be cut down to create them too. The yellow attracts them and the Vaseline traps them.
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  #7  
Unread 03-16-2008, 10:12 AM
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That's very cool! Thanks Susanne. I recently started bringing my blooming plants inside the house and I noticed the little fly/gnat thingies in the house, too. so I figured it's something in the plants (I suspect the ones potted in moss). I don't plan to repot the bloomers so I am going to try the yellow/vaseline cure.
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  #8  
Unread 03-16-2008, 11:52 AM
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I too just had an outbreak in the last month. I hung the sticky ribbons (97 cents -Walmart, the type you pull out of the cardboard tube) and have been catching all the adults. I havent been seeing any lately.

Out of curiosity, i just checked the ribbons...about a hundred on one, and approx. 50 on the other.

Unfortunately, i have quite a few phrags that have wet medium all the time. Perfect for fungus gnats.
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  #9  
Unread 03-16-2008, 12:32 PM
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Quote:
Originally Posted by dave b View Post
I too just had an outbreak in the last month. I hung the sticky ribbons (97 cents -Walmart, the type you pull out of the cardboard tube) and have been catching all the adults. I havent been seeing any lately.

Out of curiosity, i just checked the ribbons...about a hundred on one, and approx. 50 on the other.

Unfortunately, i have quite a few phrags that have wet medium all the time. Perfect for fungus gnats.
Be sure to keep those strips up for at least a couple months till all the larvae reach adulthood and find the strips. I replaced mine after a month to see if any news flies hit them and got maybe 2-3 flies. That's how you know your close to eradication. They didn't come back in my orchidarium after this.
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  #10  
Unread 06-14-2010, 06:18 PM
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Join Date: Jun 2010
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Default About Dish Soap

Quote:
Originally Posted by Lagoon View Post
Dish soap has always worked well for me, also repotting.

How much dish soap to a small spray bottle and how often. Thanks for any help.
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