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FLIES! AWWW!

This is a discussion on FLIES! AWWW! within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; I noticed some flies crawling around the media and flying around....looks like fruit flies....I stoped ...

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    Angry FLIES! AWWW!

    I noticed some flies crawling around the media and flying around....looks like fruit flies....I stoped watering for a little bit to see if they would die. but every time I water they seem to return. Any suggestions before I throw an A-Bomb at my orchids?

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    Sounds like fungus gnats. I hate them!! Repotting can help. If that's not practical, try running some soapy water through the medium. And most of all, get lots of yellow sticky traps.

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    also bug eating plants like butterwort and sundew do a good job catching them ..I don't know if this has anything to do with it but the water I use has been stored with mosquito dunks in it , not had any fungus knats for a long time .

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    Quote Originally Posted by ang709 View Post
    Sounds like fungus gnats. I hate them!! Repotting can help. If that's not practical, try running some soapy water through the medium. And most of all, get lots of yellow sticky traps.
    I agree with Angie

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    I have a couple of Mexican Pinguiculas they attract and kill so many gnats that i see only 1 flying around... culture requirements are similar to many orchids. Just need to use distilled water and have some water in the saucer till it dries up...

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    Letting mediums dry out is the most commonly proposed method of dealing with them, but who waters all their plants at the same time then can let them dry out? Some will dry out faster than others, and leaving them dry while waiting for others to dry can hurt your plants.

    On that note though, do try to let things dry out a bit when possible, as it will give the gnats no breeding grounds. In desperation, I use two methods. In my old house, I bought one of those blue light things for ten pound from a DIY store. Got em all

    In my new place, I used the yellow sticky things. They were black in a few days lol, and I think it got the majority of the little monsters.

    A-bombs are also very effective, but I have heard they aren't too good for orchids

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    no suggestions - but good luck!

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    i also wouldnt know what to do, sorry!
    but since that soapy water was mentioned, i accidentally poured some laundry water over some of my plants and was kicking myself!!! well, i rinsed it off thoroughly with fresh water,so apparently it doesnt harm that much???

    any thoughts?

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    Watering with water containing Bt (Bacteria thuringiensis) -- which is the active "ingredient" in mosquito dunks -- as Gin mentioned, can help eradicate the fungus gnat larvae. The larvae feed mainly on decaying matter and fungi though they can damage tender roots tips. The latter is more of an issue in constantly moist media. (Personally I do wonder if they don't get a bad 'rap' for this latter situation. It's possible that they are simply feeding on root tips that are already unhealthy.) To help wipe out adults, cp's like those Gin mentioned are effective -- and nifty -- biological controls. You can also use yellow sticky cards to trap and eliminate adults. "School bus yellow" seems to be the most attractive to them. To make your own, just coat a plastic yellow card with a thin coat of petroleum jelly.

    Quote Originally Posted by walingwaling View Post
    i also wouldnt know what to do, sorry!
    but since that soapy water was mentioned, i accidentally poured some laundry water over some of my plants and was kicking myself!!! well, i rinsed it off thoroughly with fresh water,so apparently it doesnt harm that much???

    any thoughts?
    Depends what was in your laundry water. If you had bleach in the water, for example, that might have done some serious damage. Not sure about some of the other additives that laundry soaps may contain. The fact that you rinsed it off thoroughly (I'm assuming very soon afterwards) probably washed away any potential harmful substances.

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    Quote Originally Posted by pavel View Post
    Watering with water containing Bt (Bacteria thuringiensis) -- which is the active "ingredient" in mosquito dunks -- as Gin mentioned, can help eradicate the fungus gnat larvae. The larvae feed mainly on decaying matter and fungi though they can damage tender roots tips. The latter is more of an issue in constantly moist media. (Personally I do wonder if they don't get a bad 'rap' for this latter situation. It's possible that they are simply feeding on root tips that are already unhealthy.) To help wipe out adults, cp's like those Gin mentioned are effective -- and nifty -- biological controls. You can also use yellow sticky cards to trap and eliminate adults. "School bus yellow" seems to be the most attractive to them. To make your own, just coat a plastic yellow card with a thin coat of petroleum jelly.



    Depends what was in your laundry water. If you had bleach in the water, for example, that might have done some serious damage. Not sure about some of the other additives that laundry soaps may contain. The fact that you rinsed it off thoroughly (I'm assuming very soon afterwards) probably washed away any potential harmful substances.
    hi pavel,
    thanks for the input!
    no bleach inside and i rinsed em immediately!

    here is another story, a friend of mine got huge super fat pbulbs from a common "dancing lady", and the lady who sold it said: her secret is, she fertilizes em with a detergent!!!
    i dont see why this lady should lie....,but it sounds soooo absurd!

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