Fungus Gnats in a commercial mmj grow

[greengardenjake]

Hello, I've got a major fungus gnat infestation in several of the flower rooms at the grow I work at.

Is there at way to get rid of such a bad infestation late in flower?

 

[cooterbrown420]

late in flower is tough at all facilities i run we use Microbe Lift from cube soak through veg and havent seen a gnat in a long time. (knock on wood) hope this helps in future

 

[Natural high]

With Fungus gnats, prevention is definitely easier than cure. The damage is probably already done, and maybe an early harvest is warranted if the plants are close to ready.

 

[soundman]

Nematodes. Dont know what late in flower is but if you have two or three weeks left they would be worth getting. They knock out the gnats in a week.

 

[Guy Brush]

Nematodes.

What he said

 

[juan2549]

Hello I have the same problem but I don´t know what brand of nematodes i could acquire. I have seen this https://pevgrow.com/en/5246-entonem-steinernema-feltiae.html and i would like to know if you recommend it

 

[Phaeton]

Between 2001 and 2011 I had three infestations. The first infestation I tried mildly soapy water, one teaspoon of Johnson's Baby Shampoo to a gallon of water. I sprayed every leaf top and bottom then rinsed the buds with distilled.
It sure killed a lot of mites but did nothing to save the harvest. The next two invasions also destroyed the crop.

No infestations since 2011. I no longer allow other growers in the main budroom, the last outbreak was caused by mites on clothing.
Intake air is filtered just to be sure outdoor mites do not float in. A lot of effort can go into prevention and still be way less effort than cleaning up after.

I am following, if nematodes or other can actually save a crop I definitely want to know, accidents happen.

 

[soundman]

Hello I have the same problem but I don´t know what brand of nematodes i could acquire. I have seen this https://pevgrow.com/en/5246-entonem-steinernema-feltiae.html and i would like to know if you recommend it

I use these.

https://www.amazon.com/Million-Live-Beneficial-Nematodes-Exterminator/dp/B007XFI4VC

I get the 5 million pack and it will do two drenches, which is overkill, in my 5x5 tent.

 

[FunkBomb]

Yellow sticky traps all over the place and GoGnats/Gnatrol.

-Funk

 

[Douglas.Curtis]

I use the Bt bits as well. Sprinkled on top of soil and in drip trays. Hydro they get floated in the res or soaked in top off water and poured through the root mass.

Doesn't affect anything except the gnats.
(edit: Make sure you refresh with new bits every few weeks.)

 

[Guy Brush]

Hello I have the same problem but I don´t know what brand of nematodes i could acquire. I have seen this https://pevgrow.com/en/5246-entonem-steinernema-feltiae.html and i would like to know if you recommend it

Yes,these are the ones, SF- nematodes (steinernema feltiae)

 

[yesum]

Bottom water and use tsp per gallon Bronner's soap and alternate with bti in the water. Let the top dry out.