If you have problems with beetles, such as Japanese beetles in the early summer, and dead patches of grass appear in your lawn in late summer, you could have grubs. Grubs are the larvae of Japanese beetles, June beetles, and chafers, among others. These C-shaped creatures feast on the roots of grass and plants. To find out if you have a problem, peel back a square foot of turf or scrape back the top layer of soil in your garden beds. If you see six or more grubs, it's time for action.
It's easier to control grubs in the lawn when they're small. Preventative grub control products like Scotts® GrubEx® go down before or just as the grubs hatch in the spring through early summer. One application of GrubEx® can kill and prevent grubs for up to 4 months.
A few grubs in the garden aren't usually a problem, but if you notice lots of grubs when you turn the soil it may be time to protect your plants by taking action. Apply a grub control product labeled for use around roses, flowers, trees, and shrubs to help protect them from hatching grubs.