Bugging me

I've encountered a problem with the boat shed in the back yard.  Mosquitoes.  Lots of them.

I had originally folded the extra plastic at the bottom of the walls back up and on the inside.  I had even ran a cord along the bottom of this fold in an attempt to keep it snug against the ground.  What I hadn't counted on was condensation.  This fold has filled in spots with significant water.  I can't swear that's how the mosquitoes started, but I've always assumed they needed a puddle of water..

I've bought a bug zapper and have cut the folds off and even poke the little excess plastic to outside the tent.  So far I'm not sure it's making any difference.

It's annoying and psychologically uncomfortable in the tent with that many about the place.  I've even bought a racket-ball style bug zapper.  I spend the first 5 minutes walking around swinging it at everything I see.  It seems to at least temporarily help.

They're a weird bunch of mosquitoes, because so far I have yet to be bitten.  Between my racket and the bug zapper, I'm sure I've killed several hundred of the critters.

Do they need an actual water puddle or is very wet grass enough for them?