Fungus Gnats

shawn75can

shawn75can

Well-Known Member
Hello everyone I’ve been battling gnats for about 3 weeks now. 5th week of flower now organic soil under Quantum Board 260. Watering schedule is hit or miss due to moisture attracting these lil bastards. I’ve dried out the medium a few times and have used peroxide at 1:4 ratio with RO water. They look best after a peroxide dump. Do I throw in the towel and restart or continue trying? I know it’s up to me but some opinions is what I’d like 1st. Thanks in advance to any insight.
 
Antman15

Antman15

Well-Known Member
Too wet. Dry it out. Fly paper for adults. Thuricide to kill the larvae. Keep the soil dryer, period.
 
shawn75can

shawn75can

Well-Known Member
Thanks Antman. I forgot to mention that I’d done back to back peroxide pours in those pics. From yesterday and today then snapped pics and posted.
 
Mcoocoo

Mcoocoo

Well-Known Member
shawn75can said:
Here are some pics
Click to expand...
it looks like you have some dead plant matter on the surface of the soil in the 2'nd pic, that will attract them. Do you use SLF-100? a good TBL per gallon of that will help, it contains baccillus thurengensis, among other enzymes that kill fungus gnat larvae, it does wonders for your roots, it will help repair any damage the larvae may have caused. imo your plants look fine btw
 
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Mcoocoo

Mcoocoo

Well-Known Member
Also it won't hurt to put some yellow sticky traps around the base of the stem, that is where the adults gnats tend to gather
 
curious2garden

curious2garden

Well-Known Mod
Staff member
shawn75can said:
Hello everyone I’ve been battling gnats for about 3 weeks now. 5th week of flower now organic soil under Quantum Board 260. Watering schedule is hit or miss due to moisture attracting these lil bastards. I’ve dried out the medium a few times and have used peroxide at 1:4 ratio with RO water. They look best after a peroxide dump. Do I throw in the towel and restart or continue trying? I know it’s up to me but some opinions is what I’d like 1st. Thanks in advance to any insight.
Click to expand...
Permethrin 36% add 2.5 cc/gallon to whatever you water with. It will fix you right up. It is local only an does not get into the plant's system. Water with that every 3 days for 2 weeks and you should be fine.

PS Ignore the adults, they are not your issue.
 
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