I was going on vacation for 2 weeks just as the beetles arrived and began to eat my cherry, peach, and buckeye trees.  I put the lure over a 5 gallon bucket of water with soap.  I put a deflector up for the beetles to hit as they flew around the lure.  When I came back from vacation, all the trees were ok, with only 3-4 beetles per tree.  The bucket had thousands of dead beetles in it.  I will use this every year starting in mid June in Ohio.  Great product.