hort.net Seasonal photo, (c) 2006 Christopher P. Lindsey, All Rights Reserved: do not copy
articles | gallery of plants | blog | tech blog | plant profiles | patents | mailing lists | top stories | links | shorturl service | tom clothier's archive0
Gallery of Plants
Tech Blog
Plant Profiles
Mailing Lists
    Search ALL lists
    Search help
    Subscription info
Top Stories
sHORTurl service
Tom Clothier's Archive
 Top Stories
New Trillium species discovered

Disease could hit Britain's trees hard

Ten of the best snowdrop cultivars

Plant protein database helps identify plant gene functions

Dendroclimatologists record history through trees

Potato beetle could be thwarted through gene manipulation

Hawaii expands coffee farm quarantine

Study explains flower petal loss

RSS story archive

Re: Battling fungus gnats

If they are THAT infested...the best thing to do is take them home and
put them in clean, fresh soil...making sure you rinse the roots off
thoroughly before putting them back in the fresh soil. And I put some
form of mulch over my office plants...whether it is dried up moss,
marbles, tumbled sea glass....something that makes the soil less
accessible to the gnats. Office plants seem to get "invaded" by other
office plants and watering them less frequently is the best defense.
Don't let others water them for you.

Hope that helps.


----- Original Message ----
From: "Johnson, Cyndi D Civ USAF AFMC 95 CG/SCSRT" <cyndi.johnson@edwards.af.mil>
To: gardenchat@hort.net
Sent: Monday, March 24, 2008 11:05:52 AM
Subject: [CHAT] Battling fungus gnats

My office plants are infested with fungus gnats.  I got rid of the
spider mites, but someone imported the gnats and they've spread to my
office.  I can report that dosing the soil with hydrogen peroxide does
not work. Neither does houseplant insecticide (I think its active
ingredient is neem). Watering them sparingly from the bottom to dry out
the soil on top - to the point where they look wilted half the day - has
also not worked. I've been using water from a jug in which I dropped one
of those mosquito dunks (supposed to be bt israelensis, effective
against gnats) but that hasn't put a dent in them yet. However I've had
those dunks around for literally years so maybe they are too old.  I've
bought a newer type called Mosquito Bits, and some sticky traps. I
looked for Gnatrol, but I can only get it mail-order and supposedly it
is the same ingredient as the Mosquito Bits.  I might also get some sand
and try topping the soil with that, I heard they can't get through the
sand to lay eggs. Hmmm.
Every time we get someone new on this floor they bring in plants with
bugs.  Argh.


To sign-off this list, send email to majordomo@hort.net with the

To sign-off this list, send email to majordomo@hort.net with the

Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index

 © 1995-2017 Mallorn Computing, Inc.All Rights Reserved.
Our Privacy Statement