How Late Can I Put Down Grub Control?

Category: Lawn Care

grub in soilAs a professional lawn care service we get a lot of questions about lawn maintenance. One of the common questions we get from late spring through summer is, “Is it too late to put down grub control on my lawn?” The answer to this question varies for a number of reasons. These crucial elements impact the answer to that question:

What is today’s date?  There are two main types of grub control treatments, preventative grub control and corrective grub control. If you are asking this question in spring or early summer, you’ll most likely need to direct your attention to the preventative grub control materials. These materials are applied well before grubs hatch in late summer and can provide several months of control as it remains ready to kill grubs after they first hatch and start to feed. If you are asking this question later in the summer or fall when you have found grubs in your lawn, you will need a curative control. This material provides good control when watered into turf with feeding grubs and has very little residual activity. It’s basically a quick-kill product.

Japanese Beetle and Green June Beetle GrubsWhat material are you using?  For the past decade or so, there remain a few consistently well-performing materials used for grub control. Some of our lawn care programs have included preventative grub control treatments of Merit ® (imidacloprid), Allectus ® (combination of imidacloprid and bifenthrin), or Acelepryn ® (cholrantraniliprole), which have been the industry standard materials to prevent grubs from damaging lawns. There area also a few other materials that can be used, but our experience has shown that we will stick with the tried and true for years to come.

If a corrective grub control is needed after grubs have been found feeding on a lawn, we have most frequently used Dylox ® (Trichlorfon, Dimethyl) to provide a quick method to kill grubs in lawns.

grub lawn controlThe Answer?  Read the label of the material you intend to use. We’d like to say there is an easy answer, but manufacturers have varied in recommended timing of their materials over the past decade as research has changed their stance. However, it’s fair to say that if you put a preventative grub control treatment down sometime in June through mid-July you’ll be in the acceptable range. This range slides slightly though based on temperatures from the beginning of the year until application time, and can slightly vary. If you are apply a corrective grub control material, your answer is “The sooner the better.” This material won’t work until it reaches the grubs and the quicker you kill grubs, the less damage they can do.

Whichever material you go with, the material will need to be watered in within a specific period of time so that it can get under the turf to where grubs feed. Consult with the material’s label for these recommendations.

The Easy Solution?  Hire a lawn care company to perform a preventative grub control treatment to your lawn EVERY year as part of a proactive lawn care program. We know the best time to apply whichever material is the latest or greatest product to prevent grubs. This material can get put down so that it can get watered in and remain in the soil until grubs hatch and start to feed and we guarantee this treatment. If you find yourself later in the summer and your plans to keep grubs out of your lawn didn’t work, we can also help you with a corrective grub treatment and seeding of areas if your lawn is destroyed by grubs.

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