- If you have leftover brown patches from the Spring, those dead patches may be due to grub feeding that occurred the previous fall. To check, lift a piece of your turf. If grubs are the culprit, the dead patch will roll up like a carpet, or you’ll be able to pull up the grass and see that it has no roots.
- Irregularly shaped dead patches appear in your well-irrigated lawn in late summer.
- Critters are tearing up your lawn. Birds, skunks, raccoons, etc. eat grubs and are trying to uncover them.
- Your turf has become spongy. Sometimes you can detect sponginess before extensive brown patches appear. With well-watered lawns, sponginess may be the first clue that grubs are present.
White lawn grubs are for the birds! These immature forms of different beetles, such as the Japanese beetles or June “bug” feed on grass roots (and the organic matter in the soil), causing sections of grass in the lawn to die. Birds, skunks, armadillos, raccoons or moles will tear up your lawn to uncover and eat these grubs. Grubs eventually turn into adult beetles and emerge from soil to mate and lay eggs, which hatch into more grubs. This typically happens in the summer months, so it is very important to get rid of the grubs before the life cycle starts. Most beetles have a one-year life cycle; June bugs have a three-year cycle. *GULP!* Generally adults emerge from soil, mate, and lay eggs over the course of two to three weeks in early to midsummer. Depending on soil moisture and temperature, eggs hatch about two weeks after being laid, in mid- to late summer. The new generation of root-munching grubs begins feasting immediately after hatching. How to tell if you have a grub issue –