Gnat kill

[YumYum]

Looking at my plants I'm surprised to find what looks like gnat amaggedon. There are tons of them dead everywhere. Most seem to be hanging under the leaves of some of my plants and even some dead on top of my greenhouse cover. They are dead and not playing possum.

Anyone know what this is about? I've never noticed a big gnat kill before.

 

[YumYum]

I've been researching and the closest thing I could explain this is the sudden drop in humidity or temperature killed them.

 

[Oliver Buckle]

It makes me wonder how much it adds to the soil? If you get enough of something it adds up, my niece came home and found a swarm of bees had got into the house then died in a closed sunny window. She hoovered them up, and next time she used the hoover there was a terrible smell of rotting meat.
Wish my gnats would die, I read somewhere they don't have a spike like mosquitoes, but have a proboscis like a little saw.

 

[AndreasV]

Here is a better photo

 

[AndreasV]

Flip sorry wrong thread