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Add a mixture of vinegar, sugar and salt. The wasps are attracted to the sweet and sour scent yet bees don’t seem to be attracted by this sour mixture whereas a honey mix would be a fatal attractant. The down-side of this wasp trap is it also attracts and traps beneficial insects such as lacewing and hoverflies which are a natural pest control of aphids, so watch timing and usage spaces.
Homemade fly/wasp/yellow jacket trap. I made several of these last summer around the chicken area. Worked very well. Simply throw away when full. Avoid sweet bait if you don't want to accidentally trap honey bees. Meat will get more wasps and yellow jackets, rotten stuff will get hornets and flies.
Homemade Mosquito trap...a lot of other pinners complained that when they tried this it didn't work...even with fresh yeast or with dark paper around it or in warm dark corner of the yard. I don't think we'll lose much by trying, but not getting my hopes up.