Most of the techniques that are posted kill the beetles but does nothing for further hatching, you have to kill the grub that they hatch from. The grub is in the dirt, I did an application of Milky Spores in May then I did the recommended second application yesterday for the second hatching, I don't have any beetles so far. According to my guy at the nursery said I won't have to apply any more for a few years. I know it's expensive but if it works it's worth it! JMO
My research says they'll come from as far as a mile away. However.......I'm definitely going to do some serious prevention. Milky spores are on the list for consideration.Only killed 6 or so today. But I know they're in the ground.Anyway, the gardens are doing very well in spite of the little devils.Rg