Out of sight…out of mind
Grubs live and feed in the soil. It’s easy to miss grubs as they gradually cut the roots out from under your lawn until brown patches begin to appear and they’re finally discovered. If you suspect grubs, pull back the turf. If the lawn pulls up easily (like new sod), you may find white grubs in the top inch or so of the soil.
Spring and fall feeders
Grubs are the larval (or worm) state of many types of beetles. The beetles lay their eggs in the soil, where they feed on the roots of grass plants. Most beetles lay their eggs in late Spring and Summer, and the young grubs do their greatest damage during the late Summer and Fall months.
As the weather cools, most grubs burrow deeper into the soil for the winter. They then return to the surface to feed again as the soil warms in the spring. After this spring feeding, the grubs pupate into adult beetles and begin the cycle again.
Grubs don’t disappear on their own. They should be treated by Evergreen before damage begins to appear, or as soon as they’re discovered. When discovered early enough in the year, a preventive treatment can be applied. When damage appears in the fall, a fast-acting curative treatment is needed.