Good afternoon. Today I completed your one time service call for yellow jacket activity. Today I used a liquid residual product on the exterior left side of the building on the side of the fake barn door under the eaves of the building where there was a moderate amount of yellow jacket activity. I was able to treat said area and in about 3-5 days time and thereafter while the product drys, the yellow jackets will continue to fly in and around the treated area tracking the chemical onto their bodies. Essentially this will kill them in that time. If you should have any questions or concerns please call us. Thank you for choosing Green Pest Solutions.P.S. credit Card info taken over phone at time of service.