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Do Grubs Turn into Beetles? (All You Need to Know)

Grubs, lawn grubs or white grubs all are similar creatures. They are larvae that eat grass and soil ingredients to grow. They have a life cycle. Some species have a one-year life cycle, while others have a three-year life cycle.

In their limited life cycle, they change their identity and become adults. They eat grass and take the nutrients from the soil in their entire life.

Since they live on grass, you should check your garden or yard once in a while. They can eat a portion of the garden and make the greens pale.

Do grubs turn into beetles?

Grubs turn into beetles. They grow from the larvae and eat grass regularly. They also extract nutrients from the soil. After a specific time, they start turning into beetles when they are adults. They will lead a beetle’s life and change their habits as well.

Before turning into a beetle, the grubs struggle, and they go through the different phases of life. Some grabs cannot reach the adult level; they become lifeless and can’t survive for a long time due to the natural calamities and more miniature gardens.

In today’s world, insects cannot find a better place to grow and live. Especially they fail to get enough grass for which they cannot survive and can’t even turn into beetles.

So, when you make a garden, it will be their living place, and you will find hundreds of different grabs.

Among the hundreds of different grubs and beetles, one species is the Japanese beetle with several years of surviving time. They are beautiful as well. But not every grub is a Japanese beetle; they have other species.

However, when they turn into beetles, they become large and eat more things. They will try to devour leaves and disrupt the growth of the plants. Therefore, you need to clean the garden regularly and let the grubs grow and become beetles.

Are grubs and Japanese beetles the same? Are all grubs Japanese beetles?

Grubs and Japanese beetles are the same. Japanese beetles lay eggs in your garden, and then the larvae will become grubs in late July or the following month. And, after several months, they will become the Japanese beetles again.

But all grubs are not the Japanese beetles. They can be white grubs, June beetles, green beetles, and many more. Only if the Japanese beetle lays eggs will they become the Japanese beetle; others have different species.

Though they have different species, they are all on the same page. They all can eat grass and plants as well. These are the most favorite food items for them to live on. Therefore, you cannot differentiate them while they are in larvae.

What kind of beetles do grubs turn into?

Mainly the beetles are the form of the scarab beetles. They belong to the same family, so they have similar characteristics. But when they grow, they become different kinds of beetles.

Japanese beetles:

When the grubs grow up and become adults after a year, they turn into red beetles. They will be 15 mm in length and 10 mm wide.

These are the typical characteristics of Japanese beetles. If you find these features in adult grubs, you can say Japanese beetles.

June Beetles:

There are 100 species of the scarab family; among them, the June beetles or the June bugs is one.

They are very prevalent in May/June months; that’s the reason behind their name of June bugs or June beetles. The grubs can also turn into June beetles if they are prevalent in that particular time,

Asiatic Garden Beetles:

The grubs can also turn into Asiatic garden beetles. It takes nearly one year to become an adult beetle and turn into an Asiatic garden beetle.

To become an Asiatic garden beetle, the same creature needs to lay eggs or larvae into the Asiatic beetles.

Oriental Beetles:

The grubs also can turn into oriental beetles. It is the most disruptive in your garden. They will eat most of the turf grass and destroy the garden’s roots.

European chafers:

The grubs can turn into European chafers after becoming an adult. They live under the soil while they are larvae and eat the grass and roots.

After several months, they become adults and start turning into European chafers. They can also damage your garden plants by eating most of the turf grass and roots.

How long does it take for a grub to turn into a beetle?

It takes 12 months for a grub to turn into a beetle. From the age of zero to the month of 12, the grubs live primarily under the soil.

They eat grass and plant roots. Once they grow their bodies and fly in the dark, they turn into a beetle. The process of turning beetles is slow.

Therefore, they cannot turn into beetles over time. They go through difficult phases and ultimately turn into beetles. Some grubs lose their lives and cannot turn into beetles anymore.

When do grubs turn into beetles?

When the grubs reach their adult stage, they turn into beetles. It takes the grubs about one year to turn in the beetles. Before that, they need to go through the larvae and the growing stages.

Grubs have only a few years of life-cycle. They can live for at best three years. In these three years, they faced three different struggles.

They go through the larvae phase, grow a little bit and start to fly slowly. And the last phase is the adult stage. When they become adults, they turn into beetles.

Are curl grubs and Witchetty grubs Christmas beetles?

The curl grubs are Christmas beetles, but the witchetty grubs are not Christmas beetles. The grubs have different species, and they are from various beetles. According to the grub’s family, curl grabs are from the Christmas beetles.

When the Christmas beetles lay eggs, they become a part of them. After becoming an adult, the curl grubs become the Christmas beetles again.

On the other hand, the witchetty grubs are the Ghost Moths. When ghost moths lay eggs, they become their larvae. After one year or a particular time, those larvae turn into the Moth ghost again.

Does grub control terminate Japanese beetles?

Grub control is a pesticide. It contains different chemicals and damages the growth of insects and grubs. Some additional ingredients in the grub’s controller also play a significant role in repelling insects from your garden.

Since grub control has pesticides and other pest-controlling ingredients, Grub control can terminate Japanese beetles. You can apply the controller to adult beetles. It will deter them immediately.

Apart from grub control, more pest-controlling materials are available on the market. You can also make some at home with your home remedies as well.

How do you get rid of Japanese beetles and grubs?

Getting rid of Japanese beetles and grubs is not a challenging task anymore. There are hundreds of different methods and spray available for you. We have found five methods and ways that will surely help you get rid of Japanese beetles and grubs.

Neem Spray:

One of the most crucial ways to get rid of both Japanese beetles and grubs is the neem spray.

The neem spray has natural chemicals to repel the insects from the garden. You can buy the spray from the local shop or make it at home.

To make the neem spray, you need nothing but the neem leaves or the neem oil. But the neem leaves will be a great option.

You need to boil the neem leaves into the water. Then you can pour it into a bottle and spray it on Japanese beetles and grubs. They will leave or cannot survive.


Vinegar is another good home ingredient that will help you get rid of Japanese beetles and grubs.

You can make a mixture of vinegar and hot water. You can start praying it over the Japanese beetles and on the grubs by putting the mixture into a bottle.

Beetles-repellent/ Pest Controller:

Pest controllers or beetle’s repellent both are the safest way to get rid of the Japanese beetles and grubs.

You can buy them from the nearby shop and spray them in your entire garden. You must maintain safety and spray carefully on the affected plants or the grubs’ living place.

Japanese Beetle Controller:

If you have too many Japanese beetles in your garden, you can buy the Japanese beetle controller and apply them to the affected plants and grubs as well.

Final thoughts

After having one year of age, the grubs turn into beetles. They start their lives as larvae; then, they eat grass and other roots. After 12 months, they become beetles, But they need to go through several phases to turn into beetles. Some also lose their life before turning into beetles.