Today I completed your one time service for yellow jackets. I treated four in ground hives surrounding the perimeter with a liquid residual solution that will eliminate the yellow jackets as they moved through the treated areas. Please keep in mind that it may take up to seven days to eliminate the entire population. Due to the massive numbers of yellow jackets I would recommend using the front entrance and stay clear of any treated areas until activity subsides. Please allow 7 to 10 days for best results and thank you for choosing green pest solutions!