Talkback: How to tackle house plant flies
sounds good advice about watering less and covering with gravel.I had noticed it was better when I did this so good to confirm.
I wanted to find kut how to deal with sciarid fly and read the artice above. I am not sure when this was written but I would like to draw attention to this webpage by the RHS that I read today.
We've been driven mad by these pests, always flying around. Not sure how I found out, but have tried only watering plants from the bottom, not onto the compost. It seems that they lay their eggs on the top of the compost when it is nice and damp. This has made a big difference, far fewer of the little blighters now.