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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.
fruit fly trap....put a piece of fruit into a jar, insert a funnel (paper wrapped into a funnel with a small tip opening) into the jar, tape open edges so no flies can escape.
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.