With the predominant grub rapidly switching to the larval stage of the Japanese beetle, it's best to hold off grub treatments for at least a couple of weeks. The idea is to get all the eggs hatched before your application.

The eggs of the Japanese beetle and green June bug usually aren't hatched until three or four weeks after the June bug eggs. This would push treatment time to the end of August, rather than the beginning. More on grub treatment will follow in a few weeks.