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 go down before or just as the grubs hatch in spring through early summer or when you see adult beetles flying around.
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 Ortho® Rose & Flower Insect Control Plus Miracle-Gro® Plant Food Granules around your roses, flowers, and shrubs in summer when beetles are present, to protect them from hatching grubs. For grubs around tree roots, apply Ortho® Tree & Shrub Insect Control Granules.