White Grubs Can Devistate Your Lawn




We have recently been noticing that some of our warm season grass lawns seem patchy or slow to green up as they are coming out of dormancy. There could be many reasons why this is happening. We have been experiencing milder temperatures in late April which could be setting back our Bermuda and Zoysia lawns. Realize not all lawns’ make-up are the same and not all lawns green up at the same time. Each lawn and its soil is unique and mother nature has its own plan for when it is to come out of dormancy. The very herbicides that keep your weeds under control can contribute to keeping it dormant a little longer. But be patient, it is coming! Also diseases, such as spring dead spot, are a possibility where you may see patchy looking dead spots. Just so you know, 4-EverGreen has been out doing our own investigating and have found some lawns in West Tennessee are being affected by White Grubs. Heavy white grub infestations can destroy grass roots, causing the affected area to become spongy, which allows the sod to be rolled back like a piece of carpet. Evidence of grub damage, including patches of dead or dying turf, are visible during spring (April and May) and late summer and fall (September and October).

White Grubs are dirty white, soft bodied, and has a brown head and six well-developed legs. White Grubs are usually seen just below the soils surface about two to four inches in depth.  When the turf is lifted to expose the white grubs, they usually will be lying on their sides in a C-shaped position. The C-shaped body along with being white in color is an easy way to identify the White Grub. The size of a white grub varies with the type of White Grub it is and at what life stage the pest is in. An average size for the White Grub is about one inch long.


As the White Grub matures around mid-summer, a particular variety of the grub turns into the Japanese beetle. Japanese beetles can wreak havoc on landscapes causing a tremendous amount of damage in a very short period of time. In West Tennessee, depending on temperatures, the Japanese Beetle usually shows up towards the end of May or the first part of June. The Japanese Beetles are often times found on, but not limited to Crepe Myrtle’s, Rose Bushes, Ferns, and many more trees and shrubs.

How Can You Check Your Lawn For White Grubs?

A good way to check for White Grubs is to get a spade and dig out one square foot about 4 inches deep. White Grubs should be relatively close to the surface, depending on temperatures.

To control the White Grub, apply the appropriate insecticide when temperatures are warm, while grubs are small and feeding on the roots of your particular turf. The cooler the temperatures, the deeper the grubs will burrow in the soil which will make them more difficult to control. Therefore, mid-to-late Summer would be best if White Grubs are in high numbers. If you have any questions or concerns about your lawn, please call our office for assistance. We are here to help. Thanks as always!

Scott Riley

4-Evergreen, LLC.




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