The Best Time to Treat for White Grubs is June and July

In Georgia, white grubs can be spotted in early Spring – however that’s not the best time to treat for this pest. If you have a white grub infestation, treatment should be applied in June or July.  Here is some handy information about these pests, including how to identify and treat these grubs.

What are White Grubs?

White grubs are the immature stage of a large family of beetles, including green June beetles, Japanese beetles and chafers. There are approximately two dozen different types of white grubs here in Georgia, and some present a serious threat to your turf by feeding on the roots during the Spring, Summer and Fall – although the majority of damage happens during Summer and Fall as the grubs mature.

Signs you May Have a White Grub Infestation

The signs of a white grub infestation are similar to other problems that cause root damage, such as thinning, yellowing, wilting and irregular dead patches. To identify whether the root of your problem is caused by white grubs, cut into a small section of your turf and roll up the grass like a carpet.  Then, dig approximately four inches into the soil and count the number of white grubs you see.  Most species of white grubs have grayish-white bodies, brown heads and curl into a C-shape when at rest.  It’s normal to find a couple of white grubs in healthy lawns, however eight or more per square foot may indicate a problem that requires treatment. 

Treatment for White Grub Infestation

The amount of moisture in the soil affects how well the white grub population thrives. Prolonged wet, moist soil creates the ideal breeding ground for these pests.  While we can’t control the amount of rainfall, it is always a good idea to irrigate deeply and less frequently rather than more frequent, lighter sessions.  Dry soil can reduce the survival rate of both eggs and small grubs.  If the white grub population has become well-established, it may warrant the use of a soil insecticide to avoid serious damage to your turf.  We recommend a good watering immediately after the insecticide has been applied – up to 1 inch of water – and then allowing the soil to dry out for a few days.

Worried that you may have a white grub infestation but don’t want to dig around for these pests? Handy Andy Outdoors clients can simply give us a call instead!  We’ll diagnose the problem, recommend and apply the appropriate treatment.