Bugs in compost

[Nickmozz]

Second question from me today!

I keep finding my compost is jumping with little bugs.  (not a huge infestation)... but I find them in the compost of houseplants or in post in the garden.  They are probably about half the size of a black ant and fly up out of the compost.  They're quite easy to catch and squash but are they:

a) doing any harm?  b) what are they? c)how do I get rid of them?

If they are harmless then that's fine outside but I don't like them in houseplants indoors.

Thanks Nick

 

  

[Robinia]

Welcome to 'gardener's world' Nickmozz!

The flies are called sciarid flies or fungus gnats & they don't usually do any harm to strong plants.  They are annoying though I agree!  Use a good quality potting compost, don't overwater & remove any dead leaves immediately.  If you really want to treat them with chemicals apparently you water with permethrin.