They were a TERRIBLE problem for us. They ate the corn, asparagus, japanese and weeping cherry, etc. Try 'Milky Spore' available at most garden centers. This product is sprinkled over the lawn to control larvae. It will take two years(and two applications)but IT WORKS. We also used the beetle traps. The one that is a plastic yellow X-shaped top attached to a green bag. Seemed to work best with both the food and sex lures. Also, you want to be sure to place them AT LEAST 20 ft away and downwind from problem areas. It will seem as if they are attracting ALL the beetles for miles,it actually is trapping only the ones nearby. Good Luck!