Japanese Beetle (Popillia japonica)

http://durgan.org/2012/June%202012/26%20June%202012%20Japanese%20Beetle%20(Popillia%20japonica)/HTML/ 26 June 2012 Japanese Beetle (Popillia japonica)
The Japanese Beetle skeletonizes the leaves of my grape vines. I have also seen a few on the potato plants. They appear every year, certainly over the last three years.My local control is to flip them off the vines into a pail of water, shake the vines on a windy day and they disappear.They are poor flyers. I also powder with diatomaceous earth. The damage is acceptable if they are not left to feed. They can skeltonize the grape leaves in an afternoon, since they are often in large numbers. Fifty to one hundred is not uncommon.