Getting Rid of Fungus Flies in Your Houseplants

Flies in your house plants can be a real annoyance and once they are established they can be difficult to eradicate. This is a guide to getting rid of fungus flies in your houseplants.
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July 29, 2011 Flag
7 found this helpful

Fungus gnats live in soil. The gnats lay their eggs in the soil and their larva feed on the decomposing matter, they pupate and hatch into flying gnats which starts the cycle all over again. The best way to get rid of them is to break this cycle.

Put a thin layer (approximately 1/8th inch) of fine, clean sand on top of the soil in your containers; this keeps the adults from laying eggs and any pupae/larva from hatching. Trap any adults flying around with sticky traps or even a saucer of juice. That's it! Simple and it works. Stop the cycle and no more gnats!

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Source: I work at a plant nursery and listen to gardening radio programs. A few years ago, on Garden Compass, this is what they suggested. I have been giving this tip to my customers ever since, and it has always worked, no complaints!

By LeeAnn from Redding, CA

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July 29, 20110 found this helpful

This sounds great! What kind of sand do you use?

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October 22, 20120 found this helpful

Doesn't the sand wash into the soil when you water?

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December 19, 2012 Flag
0 found this helpful

I recently was given four large houseplants and now I have little black flies everywhere. I have also noticed little tiny bugs in the soil. How do I get rid of them? And I was also wondering if house plants carry bed bugs?

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Thanks.

By bishopjulia

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December 24, 20120 found this helpful

Diatomacious Earth. I always keep DE on hand for the animals and me too. The food grade can be used in the garden. On your indoor plants, sprinkle on top of soil. As it gets wet you will replace but the flies are hatching from the soil. Break the cycle. Easy. Natural.

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Anonymous Flag
September 22, 20160 found this helpful

Put playground sand on the top of the dirt. You can get it at walmart. Work's great. I think it keeps the flies from being able to hatch and get out of the sand.

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December 16, 2011 Flag
0 found this helpful

I have little water flies. They like the damp ground in my indoor plants. How do I get them out of my house?

By Pat C.

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December 27, 20110 found this helpful

Hairspray will kill them if you are dealing with just a few.

.

Mix a solution of 1 cup balsamic vinegar and 2 or 3 tbsp. of Dawn dish soap into a small cup or several small cups. The gnats will be attracted to it and climb in.

Or you could save jars and clean them out and pour vinegar into them and poke holes in the top of the jar.

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