While this spray-bottle design makes it unsuitable for covering broad areas, such as an entire yard, it’s ideal for treating grub insects, beetles, and other pests lurking on roses and flowers.

White Grub Management Strategies. Cultural Control. Here is a primer for white grub management. First, these white grubs flourish where there are thick layers of thatch.

The best method of control I've found is to use a soap spray. I mix about a tablespoon of Dr. Bronner's liquid soap in a quart bottle of water.

The grub killer is available in granule and liquid form, the former being better for general purpose elimination, while the latter can be used as a spray to reach worms hiding in bushes.