How to kill wasps

Summer is so short, I want to enjoy the back yard as much as I can before the snow starts flying again. But, our al fresco dining is often interrupted by pesky wasps. I'm not sure if the garbage strike stimulated the wasp population of Toronto, but it has been a dangerous summer for a person who swells from wasp stings.

A few weeks ago, we were having friends over for a BBQ and the yard was full of wasps. I had heard that you can create a wasp trap with a water bottle filled with a bit of sugar water or pop. I made two such traps, but used some old honey for the sweetener. We caught a few that night, but it didn't stop one of my guests from being stung. (Sorry Frank!)

The traps have been sitting in the back yard, but not idly. The bottle on the left trapped considerably more wasps than the other one. Is it a higher concentration of honey? A different bottle shape? Or does misery like company? I don't know, but I made a third trap today and I encourage you to make one and help reduce the wasp population of Toronto.