Actually...Dr Dave Smitley is working on this very problem at Michigan State. The plan is to travel to an area that has had grub infestations the longest in the US. Parts of the east coast. Collect as many grubs as you can. Release them on the yards or golf courses where the grub problems occur in your town. The Massachusetts area with most year's of infestation will naturally have the most natural parasites and diseases of grubs.
So far Dr. Smitley has found Ovovesicula . Hold on wile I check on this.
Found parts of the research work.