As far as ground wasps and yellow jackets go, we are getting into the season where they are getting active. I go out and take some time to patiently scout the yard. I look for flying wasps and then you can pick up their flight pattern and destination pretty quickly. Saves you a painful experience mowing and possible trip to the ER. You may not think you are allergic but if you get lit up by a dozen or more stings you are going to swell up and if mildly allergic, that many stings could be a hospital visit.