How To Control Grass Grub?

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If you are a serious gardener or landscaper, it is most likely that you have experienced dealing with the grubs.

Grubs can give you a lot of problems to your garden, however, the most common problems that you will encounter in your garden is damage to your lawn.

Actually, grubs do not only attack the lawn, in the agriculture industry, gardeners or farmers are also facing a lot of problems with grubs that are attacking certain species of plants.

In our case, the most common type of grubs that you are going to see damaging your grass is the white grubs.

This is as mentioned in an article at called How to Prevent and Deal With Lawn Grubs. The article’s saying goes like this:

Typical lawn grubs, often called white grubs, are white, C-shaped beetle larvae about a half-inch in length.

In order for us to fully understand how to control the grubs from damaging the grass, it is important for us to first fully understand what is exactly the grub.

What is Grub?

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So what is exactly the grub? Is it a worm or is it some sort of insect?

In order to know what is a grub, we will refer a simple explanation about it from an article entitled Grub Control: How to Get Rid of Lawn Grubs from

According to the article, the explanation of what is grub goes as follows:

Japanese beetles, chafers, Junebugs and other insects in the Scarabaeidae family, order Coleoptera, go through four developmental stages: egg, larvae, pupae, and adult. “Grub” is a general name given to the larval stage, which lives in soil and feeds on the roots of grass.

So, based on the explanation given, we now know that grub is not a worm. It is a beetle in the larval stage which is an insect.

You may be asking, if grub is not a worm, then, how come it is in the soil?

An article entitled Grub Worm from has the easy to understand answer for you.

Here is the explanation from the article:

After the beetles mate during late spring/early summer, the females lay eggs in the soil. Once the eggs hatch, the grubs feed in the soil during the warm days of summer.

So the answer is, the adult female beetles lay their eggs in the soil and left it there until the eggs hatch.

The grubs from the eggs will stay in the soil until they grow to become the adult beetles before they can leave your soil.

Before the grubs become mature, you will have the problems as they will feed on the grassroots that you have grown in your garden.

What is The Sign of Grubs Infestation on Grass?

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Apart from the grubs, there are a lot of other factors and pests that can affect the health of your grass.

Therefore, how do you know or what are the symptoms that your grass is infested by grubs?

One of the easy ways for you to know that your grass is being infested by the grubs is as stated in an article entitled How to Detect and Treat Common Lawn Pests from

The symptom goes as follows:

Grub damage begins with signs of wilted grass blades, followed by brown turf patches and eventual death. Spongy, grub-damaged turf lifts easily off the soil in spring and summer to reveal grubs underneath. If you see crows, skunks or moles feeding on your lawn, they are most likely searching a grub meal.

Based on the article, the first sign you should see if your grass is affected by the grubs is the wilted grass blades.

The reason for this is grubs are damaging the roots of the grass.

This will leads to improper absorption of water and nutrient which then caused the wilting.

If not treated soon enough, the grass will become yellow and eventually die.

How to Control Grass Grubs?

As we have covered a little bit regarding what is grubs and what are the symptoms of grubs infestation, it is now the time we look into how we can get rid of them.

When Any Action Is Necessary?

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Before any action can be taken, it is good for us to know when it is the best situation for you to take any action on the grubs.

It is that severe, that you should take prompt action even when you only found 1 grub in your lawn?

To better understand this, an article from entitled How to Get Rid of Grubs could give us a clear picture of when is the time that any necessary action should be taken.

The tips in the article on whether any action should be taken or not are as follows:

1. There is no need to take action to get rid of the grubs if you find fewer than five per square foot.

2. If you find more than five but fewer than 10 grubs per square foot, you’ll only need to treat your lawn if your grass isn’t healthy.

3. Regardless of the state of your lawn, you’ll need to get rid of the grubs if you find more than 10 per square foot.

Based on the article the only time when any action should be taken is when you find more than 10 grubs per square foot in your lawn.

Other than that, any action should only be taken only if you see your grass is in an unhealthy state.

Ways To Control Grass Grubs

We have been studying a lot about grubs, now it is time for us to focus on how to control them.

In general, there are 2 methods in controlling the grass grubs.

It is either you do it naturally or you use pesticides to get rid of them.

We will be looking into both of the methods in this article.

1. Natural Ways

For the ways on how we can control grubs naturally without using the pesticides, we will be referring to a video by John in his Youtube Channel Learn Organic Gardening at GrowingYourGreens .

According to John, there are 3 ways on how you can easily control lawn grubs without having to use pesticides.

The three ways are as follows:

a) Hand Picking

Image by Eugene Brennan from Pixabay

If the area of the affected area is very small, then you can always try to get rid of the grubs just by picking them with your hands.

You can manually dig the soil and find the grubs or dig the soil and put it on the sieve to find the grubs.

This method is only applicable only for small areas. If not, please proceed to method number 2 or 3.

b) Milky Spore

Milky Spore 40 oz Grub Control Concentrate Powder

The second method recommended by John in his video on how you can control the grubs is by using the milky spore.

According to John, the milky spore is a type of bacteria that you can apply to the soil that will attack the grubs.

If you would like to buy the milky spore product online, please click here.

The concept used here is like prey and predator where in this case the bacteria is the predator for the grubs.

However, the disadvantage of the milky spore is it can only be used on a certain type of grubs such as on the Japanese grub.

Other grubs might not be affected by the milky spore.

If you are not sure what type of grubs you are having problem with, please proceed to method no 3.

c) Beneficial Nematode

20 Million Beneficial Nematodes

The concept of using beneficial nematodes in controlling the grubs is the same as using the milky spore where prey and predator are involved.

However, beneficial nematodes can attack a wide range type of grubs compared to the milky spore.

You can also buy the beneficial nematodes online, please click here if you are interested.

Please read carefully the instruction given on how to use the product you bought to ensure the optimal result.

The Youtube video of John talking on controlling the grubs is as below:

2. Pesticides

The second way that you choose to control the grubs that are giving you problems is by using the pesticides.

There is nothing much to say about pesticides, as each of the different products will be telling you different stories of their advantages.

You can make your own research on which product is the best that suits your needs and circumstances.

The only thing that is important is to carefully follow the instructions given on how to properly use the pesticides that you have chosen.

If you would like to see the list of pesticides to get rid of grubs, please click here.


We have come to the end of this article.

It is hoped that you get some ideas on how you can control the grubs that are affecting your grass.

I know that there are many other ways that some people are talking about how they are doing to control the grubs.

As we are not into academics where you have to remember a certain number of methods in controlling grubs, one effective method that can solve your problem is already good enough.

Should you have any other methods on how to control grubs and would like to share it with the world, please feel free to write it in the comment section below.

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2 thoughts on “How To Control Grass Grub?

    • Yes, I really agree with you. Using a targeted insecticides is the best actions that you could have taken.

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