Rat-tailed maggots

I tried to make comfrey tea but due to my general uselessness I actually made green alkanet tea. I believe this is still quite useful for the garden. Anyway - today I started ladelling out buckets full of stinking water (I have showered twice but can still smell it on me).
The water was filled with maggots with tube bits - I believe these must be the drone fly maggots. Now having looked on the forum I take it these are not going to destroy all my plants. I ask because I had already poured a few buckets onto the raspberries and asparagus before I noticed them.
It will break my heart if my hard-won produce is eaten from the roots! Can anyone tell me if it will be OK?? I also poured the remaining sludge onto the compost heap - again - I hope this won't destroy the compost already there?
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Don't worry Helen, the larvae will die or be eaten by birds once out of the water They will definitely not attack your plants.
So glad you posted this.
I keep plants in containers of water that I am moving between gardens. Saw these maggots this morning in one of them and had no idea what they were. Do now
and good guys too by the description of them.
. They use the tube bit like a snorkel to breathe. A few drops of a thin cooking oil on the surface of a water butt will kill them
Why kill them fidget are they bad then?
Drone flies are not a problem. They are just a type of hoverfly. However mosquito larvae which also love standing water are a flaming nuisance in UK, and deadly in some countries. Water butts are best kept covered, and I tip out any standing water in buckets lying around etc