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For commercial pesticides, you have a few choices. Most will come in either liquid or granular form, and can contain compounds like carbaryl, imidacloprid, or halofenozide. These are known as “curative” products as they are designed to kill existing grubs.
You’ll have to check with the instruction on the how and when to apply because not all products target grubs at precisely the same stage. That means some may be put out on the lawn later in the season than others. Check the labels.
[x_alert heading=”Read The Instructions Before Buying Any Products” type=”warning”]Some products can deceive you into thinking they are effective against grubs by showing a grub on the packaging when they actually do not kill grubs at all. Be sure to read the instructions on the packaging to ensure you are buying a product that will actually work.[/x_alert]
Take note that even though chemical products might seem more effective, they will kill a lot more than just the grubs. That can have a negative effect on the health of your lawn since there are so many beneficial insects living down there as well.
I have had great results with Bayer Advanced Grub Killer. Give it a go!
If you want ideas on how to get rid of grubs naturally instead, there are effective ways to take that approach.
One of the most popular is to introduce parasitic nematodes into your lawn, which can be purchased online or at garden stores (they’re alive, so buy right before you plan to use them). They sound a little scary but they are just microscopic organisms and are harmless to anything but a grub.
Milky spore is another natural bacteria that can help if you are dealing with Japanese beetle grubs specifically.
Another simple way to kill off grubs is to let them dry out. They only thrive in moist soil and will die during a drought. Avoid watering the grass and you might find that is enough to kill them. Granted, it may not be the best choice for the grass but many species of grass will bounce back after a dry spell.
Timing can be important too. Spring and early summer can be the best time to target a grub infestation, as they are the most vulnerable then. Once they are in their hard pupae casings, they are much harder to kill. And of course, when they are in their adult phase, they aren’t under the ground any more and will require different tactics.
Still Got Grubs? Don’t Worry
While pesticides and natural methods can get rid of the majority of grubs, it is inevitable that some will remain.
If you find a grub here or there when working in your yard, don’t stress too much. It is highly doubtful that you will ever be 100% grub free.
As long as there are no signs of problems, you can rest easy.
Bonus Info: A Little Prevention
Sometimes the best way to get rid of lawn grubs is to keep them out of your soil in the first place. That means targeting the adult beetles before they have a chance to lay their eggs. When they are in their adult beetle form, they are dealt with just like any other above-ground garden bugs.
Usually, a standard insecticide will work. Even a natural repellent with pyrethrins can be enough to deter the beetles from spending time in your yard and laying their eggs. You can even go old-school and use the pick-and-crush method to kill off any of the large beetles you see in your yard.
If you can’t get a handle on your grubs this way, there are also commercial preventative products you can buy that contain many of the same chemicals as the grub-killers. These are intended to either kill/repel the adult beetles or kill the eggs before they hatch, and are labelled as “preventative” control products (as opposed to the previously mentioned curative products).
So next time you have to deal with lawn pests, now you know how to get rid of grubs.
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