The store bought traps are crap. Better to make your own with a pan of soapy water and plastic cup. We had a scientist up here making lures and giving them out freely, but they were shut down for some reason (likely from BIG PESTICIDE).
edit: and the females don't fly, only the males.
2015 - 8 buckets, 332L sap, 8.5L syrup - Barrel evaporator, 2 steam pans
2016 - 8 buckets, 432L sap
2017 - 10 bags, 470L sap, 9L syrup
2018 - 20 bags, 1050L sap, 17.6L syrup
2019 - 20 bags, 970L sap, 22.2L syrup
2020 - 17 bags, 813L sap, 17L syrup