Return to the House Plants Forum | Post a Follow-Up

 o
Fungus Gants: Any more that I could do?

Posted by MrBlubs none (My Page) on
Sat, Dec 28, 13 at 1:00

Latlet ive been seeing little black flies zig zaggin about near my plants and all over my home. I smashed a ton of them and looked at one dead one under a microscope to Identifiy it. And yes they were fungus gnats

If anyone can recall a while ago I poste about my Neanthebella palm trees and how supposley they had bugs in them.. We'll i never saw any my mom did but I didnt think so. So I did the soap in water thing and did that for a while. Then I potted them in a new pot and all was well.
Now Come today the soil was just crawly with these gnats!
I quickly scowered the internet on how rid these things but you know theres never enough info

This is what I did
I covered the soil of My Neanthebella palm trees and my Majesty palm (Only.other plant were the soil stays wet enough) with cinnamon. (I read some where this kills the fungus.on which the larvae feed upon)

I also bought those sticky trap and put two in with the palms and some in my other plants. Ive caught 3 so far!

I also have barley waterd anything (Except my Majesty.palm but I dont water it as much)

I also let my Little batch of Neanthebella palms trees sit outside for a while as it was 10 degrees and was pretty windy so I though it could get rid of some of the adults that were in the soil (There were tons when I put it outside)

Anyway, Do you giys think this is enough to get rid of these things?
Should I do anything more?
Ill make sure not to overwater my palms next time!
Thanks!


Follow-Up Postings:

 o
RE: Fungus Gants: Any more that I could do?

Your potting media and its water retaining ability may be the big issue.

Meanwhile ....... got to HD or Lowes and buy a package of mosquito dunks. Throw a 1/4 of a doughnut dunk in a gallon jug and fill with the water you use to water your plants. Let sit overnight or a bit longer in a dark area (no reason to give algae a chance to grow). Shake well and water your plants with it. Refill jug and put away until the next watering. The dunk chunk in the jug will eventually completely disintegrate. Until then, leave it in the jug and keep reusing it. The bacteria in the dunk will kill off the gnat larvae.

NOTE: This is NOT and instant fix. It will take a week or two to wipe out the larvae.

 photo xmasCreche_zpsa4896d91.gif


 o
RE: Fungus Gants: Any more that I could do?

It doesn't look like your research resulted in anything useful. Fungus gnat larvae, in potting soil, feed on peat moss particles, the slough from roots, and even tiny healthy roots. Using cinnamon or barley water would be useless.

The adults seek out moist (usually overly so), mucky potting mixes in which to lay their eggs. The larvae will thrive in those conditions. Providing a very porous medium is really all that is needed to prevent population from building up. My preferred mix consists mostly of pine bark fines....very little peat.....and I haven't seen a fungus gnat in many, many years.

Sometimes, just easing up on the watering frequency can help but that's not a sure thing unless something has been done to improve the consistency of the potting mix....from too fine and mucky to coarse and porous.

The other useful tool in fending off these little pests is a naturally occurring bacterium, Bacillus thuringiensis israelensis, which kills the larvae once ingested. We are able to apply Bt as a product called Gnatrol or by dissolving ordinary mosquito dunks in your watering can.


 o
RE: Fungus Gants: Any more that I could do?

Paul....your most excellent comments weren't there when I posted mine. :-)


 o
RE: Fungus Gants: Any more that I could do?

I'll need to go on a quest for supplies now. I have almost wiped mine out (and almost changed completely to good soil, or Al's gritty mix), but every now and then one will find its way in front of the computer monitor.

Thanks for the help I wasn't really looking for!


 o
RE: Fungus Gants: Any more that I could do?

Go buy a package of "Mosquito dunks" at the garden center. Put one quarter of one in your watering can. This will kill the larvae in the soil and stop future generations. Use sticky traps and manually kill the adults.


 o
RE: Fungus Gants: Any more that I could do?

Thanks for all the help!
Ill be heading th store later today to get some of those dunks.
I cant however repot any my.plants untill spring as I have no where to do it and I cant do it outside.
Also I was looking at old threads about putting hot water in the soil.
Does this actually
work?
If so could I Put a mosquito dunk in with the hot water and double whammy them?
Thanks


 o
RE: Fungus Gants: Any more that I could do?

DON'T use hot water. Room temperature of SLIGHTLY warm.


 o
RE: Fungus Gants: Any more that I could do?

If you can't repot, at least reduce watering and stir up the surface of the medium with a table fork or stick. This will help it dry out and disturb the flies. Keep the surface scuffed up regularly.


 o
RE: Fungus Gants: Any more that I could do?

•Posted by rhizo_1
Paul....your most excellent comments weren't there when I posted mine. :-)

I'm sneaky that way. heh eyebrows photo evilgrin0039_zps33dd0da1.gif


 photo lmaosantadancingnundies_zpseea12183.gif


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the House Plants Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here