Ask a Question forum→Mold flies or fungus gnats?

Views: 903, Replies: 14 » Jump to the end
Name: tago
Sun City, AZ (Zone 9b)
Image
tago
Apr 22, 2018 1:59 PM CST
How do you tell the difference?
Descriptions sound nearly identical as well as treatment.
I can't find pic's of mold flies.
Finding them in every shrub/flowering plant outdoors in ground beds.
I don't think they're thrips which I've read are even worse.
Thanks, tago
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
Image
DaisyI
Apr 22, 2018 11:43 PM CST
I'm not sure what the difference is either - I think its a sort of generic term used for small flies that are attracted to moldy wet areas. Both live in environments you won't find outside in Sun City.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

President: Orchid Society of Northern Nevada
Webmaster: osnnv.org
Name: Will Creed
NYC
Prof. plant consultant & educator
Image
WillC
Apr 23, 2018 2:33 PM CST
Here is a link that may help you with the distinction:

https://www.pest-control.com/f...
Will Creed
Horticultural Help, NYC
www.HorticulturalHelp.com
Contact me directly at [email protected]
I now have a book available on indoor plant care
Name: tago
Sun City, AZ (Zone 9b)
Image
tago
Apr 23, 2018 6:00 PM CST
DaisyI said:I'm not sure what the difference is either - I think its a sort of generic term used for small flies that are attracted to moldy wet areas. Both live in environments you won't find outside in Sun City.


Thank You! Daisy,
I found out the organic garden soil we use can grow fungus if it's moist and shaded.
Gotta be fungus gnats.
Name: tago
Sun City, AZ (Zone 9b)
Image
tago
Apr 23, 2018 6:06 PM CST
[quote="WillC"]Here is a link that may help you with the distinction:


Thanks Will. Helpful info.👍

Name: Mindi Hammerstone
Tracy, CA (Zone 9b)
Dog Lover Dragonflies
MindiHammerstone
Apr 23, 2018 6:08 PM CST
What do they do to plants? I have a bed I keep moist and have notice tiny flying gnats. I'm growing seeds.

Thank you in advance,

😀

Mindi
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
Image
DaisyI
Apr 23, 2018 7:16 PM CST
They aren't harmful, just annoying.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

President: Orchid Society of Northern Nevada
Webmaster: osnnv.org
Name: Will Creed
NYC
Prof. plant consultant & educator
Image
WillC
Apr 24, 2018 8:30 AM CST
Mindi - Gnats are not harmful, in and of themselves, but they are usually an indication that the soil is staying too moist and root rot may follow.
Will Creed
Horticultural Help, NYC
www.HorticulturalHelp.com
Contact me directly at [email protected]
I now have a book available on indoor plant care
Name: Mindi Hammerstone
Tracy, CA (Zone 9b)
Dog Lover Dragonflies
MindiHammerstone
Apr 24, 2018 10:21 AM CST
WillC,

Yeah it's my seed bed. Once I saw the gnats I tried to make sure to let it dry a little before watering. We're getting into the mid eighties for the third day. I need to be careful. I have a ton of seedlings up and coming up so they seem happy and they are on the very top layer. I am checking the wetness with my finger and not watering as early as I was. During the heat of the day I have to water at least twice if not three times in the all beds. No gnats there. But I am letting them dry out from the evening watering in the morning now and not keeping them wet the entire watering cycle. My pansies are an indicator.

😀

Mindi

Thank you for your help!!
[Last edited by MindiHammerstone - Apr 24, 2018 10:23 AM (+)]
Give a thumbs up | Quote | Post #1691691 (9)
Name: ZenMan
rural Kansas (Zone 5b)
Kansas 5b
Annuals Seed Starter Keeper of Poultry Enjoys or suffers cold winters Dragonflies Garden Photography
Hybridizer Region: United States of America Hummingbirder Butterflies Zinnias Garden Ideas: Level 2
ZenMan
Apr 24, 2018 11:39 AM CST
Fungus Gnat larvae (maggots) can feed on plant roots, and are harmful. The flying adults are indirectly harmful, by laying eggs that hatch into the harmful maggots.
Name: Will Creed
NYC
Prof. plant consultant & educator
Image
WillC
Apr 24, 2018 11:45 AM CST
The larvae feed on decaying organic matter, including roots that are decaying from overwatering. They are not the cause of the root decay, just a symptom.
Will Creed
Horticultural Help, NYC
www.HorticulturalHelp.com
Contact me directly at [email protected]
I now have a book available on indoor plant care
Name: ZenMan
rural Kansas (Zone 5b)
Kansas 5b
Annuals Seed Starter Keeper of Poultry Enjoys or suffers cold winters Dragonflies Garden Photography
Hybridizer Region: United States of America Hummingbirder Butterflies Zinnias Garden Ideas: Level 2
ZenMan
Apr 24, 2018 12:06 PM CST
WillC said:The larvae feed on decaying organic matter, including roots that are decaying from overwatering. They are not the cause of the root decay, just a symptom.

Colorado State University says differently.
http://extension.colostate.edu...
Name: Baja
Baja California (Zone 11b)
Cactus and Succulents Seed Starter Foliage Fan Xeriscape Container Gardener Hummingbirder
Native Plants and Wildflowers Garden Photography Region: Mexico Plant Identifier Forum moderator Plant Database Moderator
Image
Baja_Costero
Apr 24, 2018 12:09 PM CST
The gnats might feed on roots but not living ones. They are not a direct threat to your plants. They are annoying and they have the potential to spread soil-borne disease, but they are not going to eat up your plants' living roots.
[Last edited by Baja_Costero - Apr 24, 2018 12:20 PM (+)]
Give a thumbs up | Quote | Post #1691758 (13)
Name: ZenMan
rural Kansas (Zone 5b)
Kansas 5b
Annuals Seed Starter Keeper of Poultry Enjoys or suffers cold winters Dragonflies Garden Photography
Hybridizer Region: United States of America Hummingbirder Butterflies Zinnias Garden Ideas: Level 2
ZenMan
Apr 25, 2018 7:42 AM CST
Baja_Costero said:The gnats might feed on roots but not living ones.

The Colorado State University link I provided says,
" However, the larvae will feed on plant roots and leaves resting on the growing medium surface. "
Name: Baja
Baja California (Zone 11b)
Cactus and Succulents Seed Starter Foliage Fan Xeriscape Container Gardener Hummingbirder
Native Plants and Wildflowers Garden Photography Region: Mexico Plant Identifier Forum moderator Plant Database Moderator
Image
Baja_Costero
Apr 25, 2018 9:10 AM CST
I am aware of what that page says. I read it when you first put forward the link. Fungus gnats are not a threat to healthy plants, except by virtue of the diseases they might bring with them. I am speaking from direct personal experience. Your mileage may vary, of course. Smiling
[Last edited by Baja_Costero - Apr 25, 2018 2:49 PM (+)]
Give a thumbs up | Quote | Post #1692479 (15)

« Garden.org Homepage
« Back to the top
« Forums List
« Ask a Question forum
Only the members of the Members group may reply to this thread.

Member Login:

[ Join now ]

Today's site banner is by dirtdorphins and is called "Agastache"

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.