Last week the mosquitoes were so bad in our backyard that we were forced into the house. We couldn't spend more than 30 seconds outdoors without at least 1 mosquito bite. More than a few minutes outside, and we were doing a rendition of riverdance trying to swat the bugs. I decided action needed to be taken, so I headed to the store and purchased OFF Backyard Control, not sure if it would help. I figured at about $9 a bottle it was worth the risk.