See if you can find some little fish called "gambuzzis" or "mosquito eater fish"- they can be dumped in the pond and will eat the larvae. Around here you can sometimes find them in ditches after a hard rain.
They are tough little black/silver fish and will survive most any conditions. I need some more- my one koi did eat them.
I bought some last year to put in my fish pond in the front yard. They do a great job, that's for sure. But, I guess the winter killed them, they are not there this spring. I have been waiting for some more to come in with the gold fish at wal~mart but have not seen any yet !
Ok. I am so tired of the darn things I am actually buying Deep Woods Off. Deet and all. I can not go outside to do anything if I don't. I have already gone through 2 whole cans of the stuff. Doesn't matter what time of day either.