This really looks like Japanese beetle damage. These guys will eat plant material from roses to grapevines, and they are voracious eaters. You need to get a spray that controls beetles, and make sure it specifies Japanese beetle control on the label. Be sure to follow the directions. You should be able to find it at a big box store or a nursery. The other option is to hand pick them and drop them into a bucket of soapy water. They are fairly easy to catch. Here are a few websites that will give you information on the Japanese beetle: http://msue.anr.msu.edu/resources/japanese-beetle http://www.michigangardener.com/meet-the-beetles-the-japanese-beetles/ Hope this was helpful. Feel free to contact us again if you have further questions.