I'm using Cutter Natural Outdoor Fogger. It seems to work and smells good too. The active ingredient is lemon grass oil. On the day of the party I'd fog morning and evening, before and after the bees and butterflies to to sleep, using it under thrick shrubs, tables and furniture where mosquitos like to hide. Have some natural insect repellents on hand for guests that are especially subject to mosquitoes biting them.

Roselee, you said "morning and evening, before and after the bees and butterflies to to sleep,"

Is that before dawn and after dusk? We've got a party coming up too.

Yes, that's what I meant. Use your best judgement to fog before the mosquitoes come out in the evening and after they've sought their dark places to hide right before morning breaks. Just fog those dark areas. No need to waste it by spraying the air.

In the meantime empty any standing water to keep the population down. You might want to skim over this post: What are you doing to fight back against mosquitoes?

Wishing you the best.

Yes! Fogging works.

All great comments but I would add that you can use any product that contains

Pyrethrum or any synthetic version of it. It is usually water based thus leaving no residual after it is dry. It out right kills all bugs including spiders when the spider actually walks through it as they will only absorb it through their feet.

This has been used in horse barns, high end, to control black flies. We have installed automated insect control systems in horse barns and when testing the system out the flies were actually dropping like flies!!!