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7 Best Grub Killer for Lawns Reviews

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Grubs are C-shaped larvae of beetles such as the masked chafer, the European chafer, or the Japanese beetle. They grow in the subsoil of lawns and feed on grassroots as well as organic matter present in the soil itself. Showing proliferous growth between late summer to early fall, these pests are a nuisance to grasses and herbs.

best grub killer

Our Top Picks for Best Grub Killer

  1. BioAdvanced 24-Hour Grub Killer Plus Granules
  2. Scotts GrubEx1 Season Long Grub Killer
  3. St. Gabriel Organics Milky Spore Granular Grub Control
  4. Bonide Insect & Grub Control Granules
  5. Roundup for Lawns Bug Destroyer
  6. Sevin GardenTech Lawn Insect Killer Granules
  7. BioLogic’s Ecomask All Natural Pest Control

Detailed reviews of each of these products can be found below. Read on.

An indication of a grub infestation in your lawn is the presence of brown, dry patches interspersed with healthy green grass. If you dig up the top layer of the soil and find more than ten grubs per square foot, you most likely have an outbreak of the pestilential insects.

For restoring the health and vitality of your backyard, you need to employ ways to eradicate the population of grubs effectively. Here is a list of the 7 best grub killer pesticides to help you with the task.

Bonus ReadThe Ultimate Guide to Backyard Garden Plants

1. BioAdvanced 24-Hour Grub Killer Plus Granules

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BioAdvanced 24-Hour Plus is a powerful pesticide designed to eliminate grubs quickly. It contains Dylox, formulated as ready-to-use granules. These granules provide effective extermination of grubs, ants, ticks, billbugs, crickets, grasshoppers, earwigs, as well as, European crane fly larvae.

The granules are easy to use and are applied using a spreader according to the instructions on the pack. Once you spread the granules over your lawn and water them in, you should leave them overnight. Their high potency and quick action kill grubs within 24 hours.

You can choose one out of the two available pack sizes based on your requirements. The smaller 10-pound pack is enough to treat 5000 square feet of your lawn and is recommended for use against grubs, mole crickets, and billbugs. When used against other insects, this grub killing product can be spread over a wider area, over 7500 square feet.

On the other hand, the 20-pound pack covers 10000 square feet of lawn against the former group of insects and 15000 square feet against the rest.

What’s wonderful is that the formula is EPA (Environment Protection Agency) approved, which makes it safe for the environment as well as for you. Thus, you don’t have to worry about any harm to pest-feeding birds.

What We Liked

  • Easy-to-use granular formula
  • EPA-approved
  • Can be used against grubs, ticks, ants, crickets, and a wide variety of insects
  • Reasonable pricing
  • A single application will provide season-long protection

What We Didn’t Like

  • Might kill earthworms too
  • Not suitable for use near ponds or other water bodies

2. Scotts GrubEx1 Season Long Grub Killer

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Scotts is a well-known name in the lawn care industry. Its grub killing solutions are tried and tested and are highly recommended by experts. One among such products is the GrubEx1 Granular Formula, which is available in 5000 square feet as well as 10000 square feet pack sizes.

Scotts GrubEx1 Season Long Grub Killer is a curative as well as preventive pesticide. When applied in spring or early summer, it kills young grubs and prevents more grubs from developing for at least 4 months. This is advantageous as it helps keep your lawn free of grubs for the rest of the season.

Designed to work with Scotts spreaders, GrubEx1 is straightforward to use. Just spread the granules over the turf and water them in. Keep in mind; it is safer to stay away from the lawn for some time. After the grubs are killed and the lawn is dry, you can re-enter the space and use it as normal.

Speaking of its applicability, it is effective against a wide variety of pests. Aside from white grubs, GrubEx1 can also be used against chinch bugs, armyworms, and crane fly larvae. What’s more, it will not harm beneficial insects living in the soil, including earthworms and other nematodes.

An added benefit is the environment-friendliness of the formula. For all these reasons, it is one of the best grub killer pesticides available in the market.

What We Liked

  • Provides 4-month long protection against grubs
  • Can be used to eliminate a wide variety of lawn-damaging pests
  • Easy-to-spread formula
  • Does not harm earthworms and other beneficial insects
  • Safe for the environment

What We Didn’t Like

  • Cannot be used in a vegetable garden

Gardening enthusiast in the house? You might want to look at this guide to buying John Deere tractors for use in your garden.

3. St. Gabriel Organics Milky Spore Granular Grub Control

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If you are looking for a natural solution to your grub problem, this product is the one you should be looking at. Containing Bacillus popilliae, St. Gabriel Milky Spore is an organic formula designed in the form of easy-to-use granules.

Chemical-based pesticides kill grubs when applied. For this reason, they need to be applied annually for persistent protection against pests. Contrarily, bacterial spores, once applied, offer protection for 10 to 20 years. However, you will need to apply them two years in a row for maximum effectiveness.

The spores work by multiplying inside the grubs’ bodies after they ingest them, eventually leading to their death. Once that happens, they are released back into the soil in enlarged numbers and the cycle continues. What this signifies is that the supply of spores in the soil is virtually inexhaustible, and so the grub-protection is also long-lasting.

Since this is an organic product, it is safe to be used near water bodies. Additionally, it will not affect the soil-friendly nematode population and any birds visiting your lawn will also remain unharmed.

What We Liked

  • Long-lasting protection
  • Provides up to 7000 square feet of turf coverage
  • Can be used any time during the season
  • Safe to be used around ponds and other water bodies
  • Does not harm earthworms

What We Didn’t Like

  • Only effective against the larvae of Japanese beetles
  • Not suitable for the immediate extermination of grubs

4. Bonide Insect & Grub Control Granules

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As the name suggests, this product by Bonide is useful against both, insects as well as grubs. It has imidacloprid and lambda-cyhalothrin as its active ingredients. While imidacloprid is a preventive pesticide, in that it kills grubs before they can grow into beetles, lambda-cyhalothrin kills the adult insects that damage the grass on your turf.

Because of the dual-acting chemicals present in the granules, not only the surface-acting insects such as ants, crickets, chinch bugs, and others die within 24 hours of application, but the grubs present beneath the soil are also killed. Thus, the grass stays healthy and pest-free for an entire season.

Like other granular formulas, this product also carries the advantage of being easy to spread besides carrying more potency as compared to pesticide powders. As a plus, the active ingredients are completely safe for your pets. Not only that, they can even help to contain fleas and ticks, parasites that bother pets the most.

Altogether, Bonide Insect & Grub Control’s multi-action formula justifies its inclusion in the best grub killer pesticides list.

What We Liked

  • Acts both on the surface as well as below it
  • Granules are easy to spread
  • Kills around 40 insect species in addition to grubs
  • Has a quick action
  • Useful in killing parasites such as fleas and ticks residing in pet hair

What We Didn’t Like

  • Kills earthworms as well
  • Not safe for use in gardens and vegetable patches

5. Roundup for Lawns Bug Destroyer

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While searching for a pesticide, it is natural to wonder whether or not it will harm your plants. If that is a cause for concern in your case as well, think of giving Roundup for Lawns a try. It is completely safe for use in lawns, landscapes, ornamental, and flower gardens.

Chlorantraniliprole as the dominating ingredient combined with bifenthrin, ensures that this grub killer will not only eliminate grubs but also surface-active insects. Significantly, it is useful against more than 100 insect species including spiders, ants, fleas, ticks, and cutworms.

Using the powder is simple enough. Add it to a spreader as recommended in the package instructions and ensure complete coverage of the lawn. Make sure to sprinkle an adequate amount of water over the spread. This aids better penetration of the formula. 10 pounds of Roundup Bug Destroyer is sufficient to treat 2500 square feet of the turf.

What We Liked

  • Can be used in flower gardens and landscapes aside from lawns
  • Kills over 100 species of insects
  • Easy application
  • Safe for pets

What We Didn’t Like

  • Toxic to wildlife

6. Sevin GardenTech Lawn Insect Killer Granules

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Sevin GardenTech Lawn Insect Killer Granules are helpful in the elimination of white grubs and around 100 more insects. Thus, it is a great option for those looking for all-around insect protection.

Again, the granular formulation of this product makes it easy to apply. Unlike compounds that require a few days to a few months to start showing effect, Sevin Lawn Insect Killer begins working almost immediately. This is of immense value when you need prompt removal of harmful pests.

Another benefit of these granules is that they can be used in and around vegetable gardens without the risk of damage or toxicity. For homes having lawns and kitchen gardens in close proximity, this is a highly favorable feature.

With all these benefits in one affordable package, it is no wonder that this is one of the best grub killer chemical formulas available in the market.

What We Liked

  • Available in two pack sizes, 10 and 20 pounds
  • Can be used in vegetable gardens
  • Targets more than 100 insect species
  • Granules are easy to spread
  • Starts acting quickly

What We Didn’t Like

  • Smell of the product might be too strong for some people

7. BioLogic’s Ecomask All Natural Pest Control

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BioLogic’s Ecomask is packed with millions of Steinernema carpocapsae (nematodes), which are predators of the beetle larvae. Needless to say, it is the close-to-nature pest control solution environmentalists will love. The microscopic nematodes hunt down and kill pest insects, and yet are completely safe for pets, plants, and you – when speaking about toxicity levels.

As for package size, it comes in multiple variants, depending on the number of nematodes in each, thus ranging from 5 million to 100 million. You can choose one based on the area of your lawn. While the pack of 5 million is sufficient for 200 square feet, the 100 million pack can treat up to 4000 square feet.

Usage instructions are lucid and easy to follow. Further, it is advisable to keep the pack refrigerated until use. When it is time to apply, watering the lawn before spreading the product is necessary. Once you do that, all you have to do is mix in the package contents and water in a pump sprayer, a Nema Jet spray, or watering can. This solution can then be spread over the turf easily.

Effective against multiple insects, these nematodes can be used to kill fleas, borers, fire ants, and fungus gnats, in addition to white grubs. To aid users, there are separate instructions on the pack for each target. This makes it an easy-to-use, multi-utility product and also a worthy candidate for the best grub killer for lawns.

What We Liked

  • All-natural, no chemicals added
  • Safe for pets, plants, as well as the environment
  • Simple and straightforward to use
  • Available in many pack sizes
  • Very efficacious against grubs, fleas, ants, armyworms, cutworms, and many others
  • Does not pollute the water supply

What We Didn’t Like

  • Not useful for immediate extermination purposes

Important Considerations While Using Anti-Grub Solutions

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To ensure the success of your grub removal endeavors, you need to consider the following:

  • Make sure that the problem is indeed grubs.
  • If the number of grubs growing in the turf is low, you might not need an insecticide.
  • Based on your need, you can choose between curative or preventive grub control measures. This is decided by the active ingredient mentioned on the packet.
  • Mow down any weeds using a lawnmower. This protects bees from being exposed to toxic pesticides when they get attracted to weed flowers.
  • Use an appropriate amount of product depending on the size of your lawn.
  • Water down thoroughly after applying pesticides.

What are the Signs of A Grub Infestation?

Finding out whether the cause of lawn damage is an infestation of grubs is necessary before you proceed to buy and use the best grub killer solutions. Remember, common signs of a grub outbreak are:

  • Browning patches of grass
  • Spongy grass that lifts easily off the ground
  • Increased number of moles (that feed on grubs) around the lawn
  • Crows and other grub predators frequently visiting the turf
  • Tiny moths (adult flies and beetles) flying above the grass

Once you have ensured that there is an infestation of grubs in your lawn, you can take curative measures.

Different Forms of Grub Control

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There are several different types of grub control solutions that you can select depending on the time of application, the scale of the infestation, and the proximity of the lawn with water bodies or vegetable patches.

The following types are the most common:

Curative Insecticides

Curative insecticides are meant to kill grubs in any stage of development. They contain either carbaryl or trichlorfon. If you want the immediate elimination of a large number of grubs and insects, this is the option you should select. For their proper functioning, they need to be applied in fall or early spring.

Preventive Insecticides

Products containing imidacloprid, thiamethoxam, or chlorantraniliprole help prevent the growth and proliferation of grubs. They work on the effective removal of newly hatched grubs. You need to apply them in June or July for the most benefits.

Insecticides Ineffective Against Grubs

Lambda-cyhalothrin, gamma-cyhalothrin, and bifenthrin do not kill grubs. Instead, they are effective against other insects such as ants, fleas, ticks, among others. They bind with organic matter in the soil and as such, do not percolate beneath the ground to where grubs reside.

Natural Grub Control Products

Milky spores (bacteria) and nematode-containing biological pest control methods are apt for long-term protection against grubs. They remain in the soil for many years. A downside of this is that they do not provide immediate resolution of your pest problem but take some time to begin showing effect. For instance, the milky spores need to be applied for two years before they will make your lawn completely free of grubs.

Conclusion

Grubs are harmful to your turf’s health. For this reason, it is pertinent that you take up measures to eliminate them as soon as you can. One such measure is the use of grub-killing pesticides.

Selecting the right pesticidal formula is of the utmost importance. To help you with this, we have compiled a list of the 7 best grub killer formulas in the review guide above. Their pros and cons should be weighed in based on your needs for maximum protection against grubs.

Want to maximize the yield of your backyard garden plants? Read this review of the best fertilizers for yards and gardens.

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