Fruit flies????

Are fruit flies going to have any effect on my MJ? They seem to like the Fox Farm Ocean Forest i only have 2 so far but worried if they get worse they could do harm

They probably lay eggs on your plant or in the soil and then the larvae chew on root tips.

Theyre fungus gnats, little bit of cinnamon lightly dusted on the top will kill fungus/food source for the little fuckers. Found that out my one and only time trying soil.

Can I put cinnamon directly on all my soil? It's the soil that they are attracted to. It's bat guano and earthworm castings...is it OK to water with cinnamon ontop?

Absolutely, and again, lightly dust it, don't dump it, give it a couple days to work

never found them a problem, got loads of them flying round my shed, they need damp soil so if you let the soil dry out and don't over water they don't last very long
often have one or two in my grow room

I'm finding little ones crawling out of the soil....makes me paranoid

Gibbz2.0 said:

I'm finding little ones crawling out of the soil....makes me paranoid

Click to expand...

put some sand on the top of the soil and it will be the last one crawling out lol

Too much water!

Cut it down and you will solve the problem....I had them thick a few months ago....I remembered it clicked when Paula from Pure Analytics remarked, that cannabis was a desert plant...Desert are classified as 12" or less of rain a YEAR, so its low input and they will handle less watering remarkably well... Fruit flies don't live in the desert, at least not well....

Sand / DE / Silica ....if you keep watering too heavy they will just crawl thru that shit...

put a little apple cider vinegar in a cup or some fruit, ontop put some plastic wrap tightly around the top poke holes with a toothpick set it in your room

they get in they die they cant get out should help with all the other suggestions above
change it every few days

I have fruit flies here due to my fruit trees. I have never had one in my room though. I deal with fungus gnats occasionally since I do not let my soil dry out ever. The majority of microbial life is in the top few inches of the soil and if it dries out you loose that. I cover my soil with two inches of hydroton to prevent drying which in turn means I water less (18 gallon tubs get 1 gallon of clear water every 5 days or so).

I am going to give the apple cider vinegar a try. Sounds simple enough. Normally I mix spinosad in the water every 4th watering which seems to do the trick until I bring more soil into the room that has them in it.

If you want to kill the ones that are alive and not just their food source, do a half shot glass of wine with a couple drops of dish soap mixed in.

Gibbz2.0 said:

Can I put cinnamon directly on all my soil? It's the soil that they are attracted to. It's bat guano and earthworm castings...is it OK to water with cinnamon ontop?

Click to expand...

You need ceylon cinnamon.

Abiqua said:

Sand / DE / Silica ....if you keep watering too heavy they will just crawl thru that shit...

Click to expand...

crabshell helps.

Gibbz2.0 said:

I'm finding little ones crawling out of the soil....makes me paranoid

Click to expand...

1/3 h202(hydrogen peroxide) 2/3's water will kill those larvae. It will foam up but its fine.

Mosquito crumbles work for me.

Dr.Pecker said:

You need ceylon cinnamon.

crabshell helps.

1/3 h202(hydrogen peroxide) 2/3's water will kill those larvae. It will foam up but its fine.

Click to expand...

You're sure the hydrogen per oxide will be OK?

Gibbz2.0 said:

You're sure the hydrogen per oxide will be OK?

Click to expand...

yup.

Cool did some more research into it...actually sounds like a decent regimin to get into if im not mistaken?

Gibbz2.0 said:

Cool did some more research into it...actually sounds like a decent regimin to get into if im not mistaken?

Click to expand...

You could let the pots dry out a little before watering. Don't let it get so dry you kill the roots though.

Dr.Pecker said:

You could let the pots dry out a little before watering. Don't let it get so dry you kill the roots though.

Click to expand...

Yeah I plan to let it dry, I've done the cinnamon trick and it helped but I'm going to do the hydrogen peroxide anyways