Getting rid of maggots

by Peter
(Camden NSW Australia )

We recently had a very hot day, temperature in excess of 40 degrees C, and my shade cloth cover for my worm farm became detached and was blown off and my worm farm was exposed to full sunlight and nearly all of my worms died.

When I opened my farm I was swarmed by flies and despite my attempts to shoo the flies away I now have maggots in my castings.

My question is, before I restock my worm farm should I...

a. Try to eliminate the castings infested by maggots?
b. Empty the worm farm and start from scratch?
c. Spray the castings with a domestic fly spray? ( If so what affect would this have on a future worm population?)
d. Ignore the maggots and restock? or
e. Has anyone an alternative suggestion?
I have tried to remove the decaying vegetable scraps to reduce the sustenance for the maggots.

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Dec 09, 2014
Maggots in a Worm Bin
by: Pauly

Also I would leave the worm bin "as is" and not get rid of anything. The maggot poop will be food for the worms and you will surely have some worm cocoons and babies in the bedding/castings.

Letting the maggots finish eating the kitchen scraps and letting them run there course will not hurt anything as they turn into adults quickly.

the worms will continue to eat the carbon bedding as the flies will not.


Dec 09, 2014
Getting Rid of Maggots In a Worm Bin
by: Pauly

Hi Peter,

Usually in these circumstances I tell people to just let nature take its course as long as your worms are still alive they will come back.

Flies/maggots are always an indication that there is too much kitchen scraps (nitrogen) in the mix.
There should be a mix of about 20:1 up to 40:1 Carbon:Nitrogen ratio.

Too much Nitrogen also means the bedding becomes too acidic and too moist. Flies love this type of environment.

Removing as much kitchen scraps as possible was good to do and adding some more moist carbon bedding like shredded paper, cardboard, dead leaves will help. Even some Minerals like lime and eggshells will help soak up the acid and moisture.

Stay away from and type of spray if it isn't natural. Using Diatomaceous Earth sprinkled on top of the bedding is a great deterrent to keep the flies from returning and laying anymore eggs.

You will have to wait for the cycle to run its course until the last fly cocoon hatches.

Hope this was helpful,

See my pages on unwanted pests below.
Worm Farming Pests

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