Grub Worm

Feb 14, 2015

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Grub Worm

Quick Facts…

We see Grub damage way less often than other turf damages such as spider mites.

Grubs are a root-feeding immature (larval) stage of beetles, which include the following: Japanese beetle, European chafer, masked chafer, Oriental beetle, green June beetle and the Asiatic garden beetle.

The beetles lay their eggs 1 to 2 inches deep in the soil and the eggs hatch in 2 to 4 weeks.  The young grubs begin feeding on grass roots immediately.  They grow to full size within 3 to 4 weeks.  This is their most damaging time to the turf.  The grubs move deep in the soil for hibernation just before winter arrives.  They come back to the root zone and start eating again in the spring.

Around May, depending on your location, the grub transforms into pupae and a few weeks later they emerge as adult beetles.

Their most visible damage can be seen in the late summer months when the turf is most stressed.

Severe infestations may see numbers of up to 50 grubs per square foot.  Your turf will roll back like carpet & your lawn will yellow and die quickly.

Treatment for Grub Worms!

Usually grub worms are not that large in numbers to severely damage your lawn, so just let nature take its course.

If there are large numbers, insecticides may be necessary to control them. Applications should be done when they are close to the soil surface and before they have damaged the lawn.

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