Here is what you should know about the Japanese Beetle traps-they attract the beetles in order to capture them. So the best way to use them is by placing them someplace other then your yard. And I'm quite sure your neighbors will not appreciate you putting them in their yard. Just pick the beetles off and put them in a soapy solution to kill them if you are too squeamish to crush them. They will not kill your tree one way or the other. And look into beneficial nematodes to control the grubs that become the beetle.