How To Get Rid Of Grub Worms In Lawn

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You are always proud of the attractive healthy lawn in your backyard, but the presence of a pest called grub worm is about to ruin it. Now you watch helplessly as your grass slowly turns yellow.

Don’t worry. You can always do it as long as you know how to get rid of grub worms in lawn. Read this article until the end and lawn grubs will no longer give you headache. Scroll down!

What Is A Grub Worm?

You might feel tempted to think grub worm is a type of worm given its name. Actually, it is not!

Grub worms, or grubs, are the larva form laid by different species of adult beetles such as Japanese beetles. Grubs look squishy in white with an orange head and six legs. In a word, they are quite creepy!

Grubs live in the soil and dead patches of grass beneath your lawns and gardens, feeding on organic matter, especially grass roots. That being said, it is hard for the grass to absorb water and nutrients to survive, leading to severe lawn damage.

Grub worms are white and squishy-looking
Grub worms are white and squishy-looking

Grub Worm Life Cycle

The exact life cycle of several kinds of grubs is different, but it often lasts a year. In mid to late summer, female beetles lay eggs in your lawn. After several days, these eggs hatch and feed on plant roots. When fall comes, they burrow deeper into the ground to survive until spring.

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It is best to solve the issue of lawn grubs fast once you come across a sign of grub damage. Otherwise, it would take more time and money to deal with its infestation afterward.

But how do you know if there are grubs beneath your lawn?

How Can You Tell If You Have A Grub Problem?

It is not hard at all to recognize the grub damage as there are a lot of hints.

For example, your grass will look thinner while the color fades into yellow. Dead patches appear in the lawn and gradually increase in size.

As the grubs eat the roots that anchor the grass to the earth, your lawn’s grass can be pulled up effortlessly. To confirm that there is a grub problem, try pulling up a piece of your lawn. If you can do it with much ease, it is likely that grub worms are living beneath.

Dead patches caused by grub worms
Dead patches caused by grub worms

Another sign of grub is increased animal activity in the surroundings. A lot of species, including skunks, moles, racoons, and many types of bird, feed on grubs. So if you have lawn grubs, you can see these creatures around digging up the yard.

To verify the presence of grub worms, let’s examine the soil layer beneath damaged areas in your lawn. The C-shaped white grubs are visible to naked eyes, so if there are any, you can see it right away.

How To Get Rid Of Grub Worms In Lawn

Whether you take preventive measures or not, the grubs may still manage to lay their eggs and eat the grass in your lawn. If so, there is no time to think about long-term prevention. You must take action to kill grub worms right away; otherwise, you would have to deal with a grub infestation soon.

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So how to get rid of lawn grubs effectively?

In fact, there are tons of ways to get rid of lawn grubs. Take a look!

Beneficial Nematodes

The best method for grub worm control is to rely on beneficial nematodes (heterorhabditis bacteriophora) – microscopic predators of grubs. They feed on grub worms only and pose no harm to other living creatures. In other words, they are completely safe to use.

How to use this natural product is simple enough.

Just mix the powder (nematodes to be exact, but they look much like powder) with distilled water and spray it over your lawn. Don’t forget to water your lawn before and after application so that the nematodes can grow quickly and do their job. After a few weeks, you can see infected grubs in reddish-brown color.

There are many ways to get rid of lawn grubs
There are many ways to get rid of lawn grubs

Milky Spore

Another grub killer is milky spore (also known as Bacillus popilliae). It is a bacterium used against Japanese beetle grub only. Once being eaten by the larvae of Japanese beetles, the spores will reproduce and eventually kill the grub worms from inside.

The ideal time to apply milky spore is in late summer, when grubs are growing in the upper layer near the soil surface.

The milky spore grub control remains effective for a long time, even up to 15 years! Therefore, you can count on it to deal with future grub worms damage.

Neem Oil

Using neem oil is also an effective method to kill grub worms naturally. However, it is more of a preventive measure than a solution. It works to prevent the grubs from laying eggs.

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Chemical Treatment

Disclaimer: this route is not recommended and might bring about undesired effects. Grub worm killers containing synthetic chemicals can harm nearby plants, flowers, shrubs, and many more. If you insist on going this way, try to limit the use of chemicals by applying to affected areas only.

How to Prevent Grub Worms

Indeed, the best way for controlling grub is to prevent it from the beginning. Here are a few lawn care tips and tricks to get rid of grubs naturally.

  • Avoid fertilizing your lawn with synthetic chemicals. Instead, use a natural lawn fertilizer.
  • Water deep. A shallowly irrigated lawn is the best place for grub worms to thrive.
  • Mow high (about three or four inches). Female beetles need sunlight to lay their eggs, so tightly-cut lawns are their favorite targets.


Grub worms are harmful to your lawn, but there are plenty ways to prevent and get rid of them. Hopefully, you know how to get rid of grub worms in lawn and protect your attractive lawn from such a pest now.

Don’t forget to like and share this article for your friends. Thanks for reading!

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