Can I put this in my screened in porch to catch wasp??

The WHY Trap is designed for use outdoors to catch wasps, hornets and yellowjackets as they forage in your yard. We wouldn't recommend using it to catch a stray wasp that gets into your screened porch. The TrapStik for Wasps might work better for this application. Feel free to write us at info@rescue.com so that we can get more details and determine how to best solve your wasp problem.