How to Manage Grubs in Your Lawn: Best Practices for Grub Control

Maintaining a healthy and vibrant lawn is a major goal for homeowners and gardeners. A lush, green lawn improves a home's exterior and provides a beautiful space for outdoor activities. However, achieving this requires more than just watering and mowing. Sometimes, grubs or insect larvae can significantly damage lawns.

Lawn grubs are some of the most persistent and harmful pests that can invade a yard. They feed on grass roots, causing brown patches and even dead spots. Grubs are a recurring problem, especially in Florida, due to the warm climate year-round. Early detection of grub infestation may save time, resources, and labor, as unchecked grubs can rapidly destroy healthy grass.

Growcycle offers top-quality grub control products to keep lawns healthy and green. This article will explain how to identify grubs in a lawn and how to control them. From chemical treatments to natural remedies, homeowners will discover the best ways to protect their lawns and keep them looking their best.

What are Grubs?

Grubs are not insects but the larval stages of numerous beetles, including European chafers, Japanese beetles, and June beetles. These tiny parasites have gentle, white bodies with a pair of legs close to their heads. When startled, they turn their bodies into a C-shape. These microscopic pests feed on grass and other plant roots and reside underground for most of their life.

When the weather gets warmer, grubs that have lain dormant during the winter become active. In the early summer and spring, they consume grassroots, other organic matter, and foliage, causing considerable damage to plants. When lawn grubs mature into adult beetles, they appear from the ground to mate and deposit their eggs.

Adult beetles live for one to three years. In July and August, they deposit their eggs close to their feeding grounds, producing new grubs that burrow into the ground and consume grass, thus extending the infestation.

Signs of Grub Damage on the Lawn

There are various easy-to-spot signs of grub infestation in lawns; some of them are:

Chlorosis: The grass becomes yellow and mushy when grubs eat turfgrass roots. Pulling on it causes it to roll back like a carpet.

Infestation of Other Pests: Grubs are a favorite food of skunks, raccoons, and other burrowing pests, who will plow through lawns in search of them. This can result in visible damage to the lawn, such as upturned soil and patches of grass that have been dug up. Repairing this damage can be as costly and challenging as fixing grub damage.

Presence of Drought: A lawn that appears parched even after frequent irrigation could be due to grubs. Grub damage is commonly causing drought but cannot be resolved by more watering.

Growing Number of Beetles or Moths: If gardeners have seen many moths or beetles buzzing about at the grass level, lawns may have significant grub problems. These adult beetles or moths are the mature form of the grubs, and their presence indicates a potential infestation.

White Grubs: Cut a square foot of turf with a spade, about 2-4 inches deep. Pull back the square to examine the dirt beneath. If there are grubs beneath it, there must be an infestation.

Brown and Patchy Grass: In case of grub infestation, the grass will become spotty and brown before it starts to yellow and pull up. This damage will show up in sporadic locations throughout the grass.

Steps to Check for Grubs in The Lawn

It is easy to verify suspicions of a grub infestation by looking at the lawn. To check for grubs, follow these steps:

1. Digging

Pick a few spots on the grass, particularly the regions surrounding the brown patches. Dig a square foot of soil two to four inches deep using a small shovel. Look closely for grubs in the roots and soil.

2. Grubs Counting

Count any grubs you find. A severe infestation that could harm the grass is indicated if there are more than five grubs per square foot.

3. Seasonal Monitoring

Conduct these examinations when grubs are most active and visible, such as in late summer or early fall.

How Harmful are Grubs to the Lawn?

Grubs, the larval or immature stage of many beetle and chafer species, can harm a lawn by consuming grassroots. All grass can withstand a certain amount of grub feeding, but healthier grass can handle more. Grub infestations produce weakening turf patches, which eventually grow in size. Grub-damaged grass can often be simply removed at the roots.

Many homeowners believe they have grubs because moles, skunks, ravens, and raccoons are burrowing in their lawns. However, this is not a valid indicator because grub infestations are only sometimes accompanied by animal damage, and a grub infestation only sometimes causes animal damage. These animals eat other insects in the grass, such as earthworms, which are suitable for the lawn's health.

Best Practices to Get Rid of Grubs from Lawn

Dealing with grubs in the lawn can be a frustrating experience, but with the right approach, gardeners can effectively eliminate them and restore the lawn's health. Implementing these best practices can help to get rid of grubs and prevent future infestations.

1. Natural Methods

Natural ways are the safest and easiest methods to control grubs. Gardeners or homeowners can use any of the methods recommended below. 

• Predators

Grubs have numerous natural predators. Some predators, such as raccoons and moles, will harm the lawn, while others will not. For instance, robins, bluejays, and chickadees are among the birds that adore grubs and will gladly consume them throughout the day. Additionally, backyard hens will roam the yard or lawn and consume grubs.

When using birds as a natural grub management strategy, make the yard as appealing as possible to the avian guests. Decorate the lawn with birdhouses, birdbaths, and feeders. This will draw in beneficial bird species and help control the number of grubs in the yard.

• Milky Spore

Milky spore is a bacterial illness that affects the larvae of Japanese beetles. Milky spores are a natural, non-toxic, and environmentally acceptable solution for managing the white grub population. Anyone may buy a milky spore at a local home and garden store and apply it to their lawns with a cheap milky spore dispenser.

Applying the milky spore a few times a year for two to three years will yield the optimum effects. After the therapy, the milky spore will function as a biological control for 15 to 20 years. It's also critical to realize that milky spores only proliferate in soil that contains grubs.

• Nematodes

Small parasitic worms called nematodes can be employed to target and eliminate a variety of garden pests, including grubs. Because they are safe and pet-friendly, helpful nematodes are frequently used with milky spore disease.

The best way to use nematodes is to apply them immediately after purchasing. Avoid applying them in direct sunlight, as this can reduce their effectiveness. Instead, apply them early in the morning or late in the afternoon.

• Neem oil or Azadirachtin

Neem oil contains an ingredient called azadirachtin. Although neem oil and azadirachtin are sometimes confused, neem oil has a shallow concentration of azadirachtin. For this reason, individuals typically purchase concentrated Azadirachtin to apply to their lawns.

Unadulterated neem oil prevents the grubs from developing, eating, and producing eggs. After mixing neem oil with water, apply the diluted solution to the afflicted regions for optimal effects. Although both neem oil and Azadirachtin are effective, they need regular reapplication for the desired results.

• Borax

One typical household cleaning product that can be used to eradicate grubs is borax. However, remember that borax contains boron, which accumulates in the soil and, at significant concentrations, can destroy the lawn. To effectively use borax, put a tablespoon into a spray bottle with warm water. Spread the solution widely wherever gardeners observed grub activity.

• Dethatch and Aerate the Lawn

Grubs find the lawn less appealing when it is detached and aerated. They find a thick layer of cover in thatch and compacted, dense soil. Thus, removing thatch and aerating the lawn makes the area less inviting to the pests. Furthermore, these techniques facilitate the penetration of the lawn's surface by nematodes, milky spore disease, and other natural remedies, allowing them to reach the grubs.

2. Chemical Methods

Chemical treatments can offer a quicker fix for severe grub infestations when natural approaches are insufficient. Chemical therapies come in various forms, each with a unique mechanism of action.

• Insecticides

Insecticides are used before the grubs hatch and begin to harm the area. They work best when used in late spring or early summer. Imidacloprid and chlorantraniliprole are often used in preventative care.

• Granular and Liquid fertilizers

There are two chemical treatments: liquid and granular. A lawn spreader can apply granular products because they are easy to disperse. Liquid fertilizers work better for urgent infestations but must be used carefully to guarantee even coverage.

3. Professional Help

Leaving chemical treatments to professionals is safer if gardeners need help administering themselves. There are numerous benefits to using expert lawn care services for grub control. Professionals have a comprehensive understanding of insects and their life cycles, which enable them to address severe infestations quickly and effectively.

Professional services also thoroughly examine the lawn to find any underlying faults causing grub concerns. They provide specialized maintenance programs to meet the lawn's unique requirements, encouraging resilience and long-term health.

4. Integrated Pest Management

Integrated pest management, or IPM, integrates several techniques to handle pests in an environmentally responsible manner. For example, IPM can efficiently manage lawn grub populations, reducing ecological damage.

To control pests, IPM combines chemical, physical, and biological strategies. Combining targeted treatments, natural predators, and preventive measures can achieve healthier grass and less dependency on chemical pesticides.

5. Seasonal Control

Grub control needs to be timed carefully. Targeting grubs at certain times of the year when they are more active is more effective. Grubs are most active in late summer and early fall, making these periods crucial for control. During the fall, grubs are closer to the soil's surface and eat grassroots aggressively. This is the best time to use both chemical and natural treatments. Regularly checking the grass during these times can help prevent infestations.

Grub activity decreases in winter and early spring, so these times are less important for control. However, keeping the grass healthy all year is still essential. Regular lawn care helps the grass recover and become more resilient.

Top Grub Controlling Products

Chemical insecticides are the quickest way to ward off removing from the lawn or yard. Below are some highly recommended grub-controlling products.

1. Acelepryn Insecticide - Liquid Grub & Armyworm Control

Acelepryn Insecticide controls many lawn pests with strong, season-long power against grubs, armyworms, and billbugs. Its active ingredient is Chlorantraniliprole (18.4%), which ensures total protection with just one application, up to 22,000 square feet in a single 4 oz bottle.

This insecticide is environmentally friendly, safe for humans and pets, and beneficial for insects. Acelepryn works on all types of lawns and can protect them for up to three months. It is easy to use and targets pests before they grow into adults, helping to prevent lawn damage and protect the ecosystem. This product is perfect for homeowners and landscapers who want a healthy, pest-free lawn.

2. BioAdvanced- 24Hr Grub Control Gran

BioAdvanced 24-Hour Grub Killer Plus's systemic, non-neonic formula kills up to 5,000 sq ft of grubs within 24 hours. Including DYLOX (Trichlorfon) at a concentration of 9.3%, it also kills ants, chinch bugs, mole crickets, and many other insects.

This highly efficient granule has 50% more active ingredients and 33% less weight, covering the same area in a smaller, more convenient bag. Its easy storage makes it convenient for quick lawn rescue and effective pest control.

3. HiYield Grub-Free Zone

Hi-Yield Grub Free-Zone is a highly toxic insecticide that employs 0.5% Imidacloprid to control white grubs before they can damage the lawn. It also controls pests such as mole crickets, larvae of the European Crane Fly, Green June Beetles, Billbugs, and many more.

Ideally, this product should be applied before the grubs hatch. Once used, sufficient watering of the lawn forces the active ingredient through the thatch and into the soil, where it will carry out its job. Covering up to 25,000 square feet, Hi-Yield Grub Free Zone III is a reliable solution that will keep the lawn pest-free all season long and helps keep grass in the best possible condition for growth.

4. Bonide 5m Annual Grub Beater

The Bonide Annual Grub Beater is great for protecting lawns from damaging grubs and other harmful insects. With just one application each year, it provides long-lasting protection against grubs, making it a simple solution for lawn care. This product kills grubs and targets other pests like European Crane Fly larvae and mole crickets, which can harm the lawn. It can be applied anytime from spring to summer, allowing users to choose when to use it.

This 6lb bag of granules can cover up to 5,000 square feet, ensuring the safety of the lawn. Whether gardeners have an active infestation or wish never to have one, an application will ensure the lawn is safe and sound from these pillaging pests throughout the season.

Tips to Get Rid of Grubs

 Here are some simple tips to help get rid of grubs and keep the lawn healthy:

1. Make Sure Grubs Are Actually the Problem

Before taking any action, one should confirm that grubs are causing the lawn problems. Signs to look for include patches of dead grass that lift easily from the soil, revealing white, C-shaped larvae underneath.

2. Avoid Pesticide When Possible

It's best to avoid using pesticides whenever possible. Pesticides can harm beneficial insects and the environment. One should explore alternative methods and only use pesticides if necessary.

3. Check the Active Ingredients

When choosing a treatment, check the active ingredients to ensure they are effective against grubs. Products containing ingredients like imidacloprid or chlorantraniliprole are commonly used.

4. Water Immediately

After applying any treatment, it is important to water the lawn immediately. This helps the product penetrate the soil and reach the grubs, making it more effective.

5. Consider All-Natural Grub Solutions

Natural alternatives, such as neem oil, milky spore, and beneficial nematodes, can control grub populations without using harsh chemicals.

6. Use Products at the Right Rate and Volume

Always follow the manufacturer's instructions on the rate and volume of application. Overuse can damage the lawn, and underuse may not effectively control the grub population.

Common Myths About Grub Control

Several grub control myths can result in inefficient treatments and persistent infestations. Be aware of the facts to take better care of the lawn.

• Grubs are Visible: A common misconception is that grubs are always found on the soil's surface. In actuality, grubs eat roots and spend most of their time underground. Only during specific periods do they approach the surface to feed.
• Only Chemical Methods Work: Although chemical treatments have their uses, they are not the sole choice. Grub populations can also be effectively managed via biological controls and cultural practices, which are safer for the environment.
• Grub Damage to lawn instantly: Grub damage tends to build up over time. However, gardeners may wait to see the damage if the grubs feed on the grass.

FAQs

Are there natural alternatives to chemical grub control?

Yes, there are natural methods, such as introducing beneficial nematodes or using milky spore disease, which targets certain grub species. However, these methods may take longer to show results.

Will grub control affect other beneficial insects?

Many grub control products are designed to target specific pests while being less harmful to beneficial insects. However, reading the label and choosing products carefully is essential to minimize the impact on non-target species.

Can grubs cause long-term damage to the lawn?

Yes, if left untreated, grubs can cause significant damage to lawns, leading to dead patches and weakened grass. Early detection and control are crucial to maintaining a healthy lawn.

The Bottom Line

Managing grubs is important for keeping the grass green and lively. Gardeners and homeowners can find grubs early by learning what they are and how to recognize the damage they cause. There are various ways to keep grubs away from the lawn, including:

• natural methods
• chemical treatments
• preventive measures

Natural predators like nematodes and birds can help keep grubs away. Chemical treatments can also eliminate grubs, but they need to be used carefully. Growcycle provides excellent products, including lawn fertilizers and insecticides, to help get rid of grubs in the soil and keep the lawn looking vibrant and lush.

Disclaimer: This material is for informational purposes only and should not be relied on for legal, medical, financial, or any other form of professional advice.

About the Author

Victor Miller

Environmental Journalist Focused on Sustainable Agriculture

Victor Miller is an environmental journalist at Growcycle, where he covers the latest news, trends, and innovations in sustainable agriculture. He has a deep passion for storytelling that emphasizes ecological balance and responsible farming practices.

Before joining Growcycle, Victor worked for several agricultural and environmental publications, reporting on significant environmental issues and interviewing key figures in the sustainability sector. His work has been featured in various industry journals and online platforms.