Pleurotus ostreatus infested with tiny gnats. I can see them with my loupe but too hard to photograph even though I said cheese! They have prominent attenae, and segmented bodies - but I guess that describes most insects :(
Using uv light as the led light made them scamper away
Maybe 1-2 mm in length. And they leave bite marks!
Here's a better picture taking using a macro lens on my mobile phone
What can I do to eradicate them with out harming the mushrooms? In the first instance I've removed the substrate from the bag, and sprayed with a mist of water to try and wash them off. This must be the 4 or 5 flush from the culture!
Edit: looks like the infestation, or treatment, was enough to cause all of these mushrooms to abort.