How to Get Rid of Grubs in Lawn: Effective Ways + Homemade System
Homeowners with beautiful lawns often face a common, frustrating enemy: the grub worm. Soil naturally contains countless insects, most of which are highly beneficial to your yard’s ecosystem. However, certain pests like grubs can quickly turn your lush green turf into an eyesore if their population grows out of control.
Known by many names, including lawn grubs, white grubs, or turf grubs, these pests survive by eating the roots of your grass. A severe infestation can completely destroy the root system and ruin the health of your soil. If you are wondering how to spot a grub attack and what the remedies are, you are in the right place. Let’s look at how to identify and eliminate grubs using highly effective natural and homemade remedies.
What Are Grubs?
Grubs or grub worms are the larval stage of various beetle species belonging to the scarab family. Visually, these pests resemble small shrimp with creamy-white bodies, rusty orange heads, and six distinct legs near the front. Their slick, shiny bodies are typically found curled up in a “C” shape just beneath the soil surface.
A common misconception is that all grubs are the larvae of Japanese beetles. In reality, they come from several different beetle species. While they share very similar life cycles and cause identical damage, four major species of scarab beetles are primarily responsible for turning your lawn’s root system into their personal buffet.
4 Major Types of Lawn Grubs
Though it is believed by many that Japanese beetles larvae are the only grubs that cause harm to the lawn or to plants, this is not always the case. Understanding exactly which beetle larvae are invading your yard can help you target them more effectively. Here are the four primary culprits:
Japanese Beetles: These are highly destructive grubs, particularly common in the Northeast. They grow up to an inch long, spend the winter deep in the soil, and can be identified by a distinct V-shaped pattern of hairs on their raster (the underside of the last abdominal segment).
May/June Beetles: Slightly larger than Japanese beetle larvae, May and June beetle grubs spend about 80% of their life cycle underground. They feature two parallel rows of thick, stubby hairs on their hind end. Fortunately, only a few species within this family actively damage lawn grass.
Oriental Beetles: If your lawn develops thin, brown patches in the late summer and early fall, oriental beetles may be the cause. They actively devour entire root systems and look quite similar in size to Japanese beetle grubs, but they feature a different, more random pattern of posterior hairs and a broader mouth structure.
Northern & Southern Masked Chafers: Native to North America, these grubs look nearly identical to other white grubs. The easiest way to identify them is by looking at the hairs on their final abdominal segment, which are scattered in a completely random pattern without rows.
Signs of a Grub Infestation in Your Lawn
Because grubs live a few inches beneath the soil surface, catching an infestation early can be difficult. However, your lawn will display a few clear warning signs:
Dead, Irregular Patches: If areas of your lawn turn yellow and die, or if you notice random brown spots, grubs may be eating the roots beneath those patches.
Spongy Turf: When a lawn’s root system is gone, the turf will feel spongy or bouncy underfoot. In severe cases, you can pull the grass up and roll it back easily, just like a piece of carpet.
Increased Wildlife Activity: A sudden influx of birds, raccoons, skunks, or moles digging up your yard is a strong indicator that a rich food source of grubs is waiting just below the surface.
Visible Grubs: Finding multiple white, C-shaped grubs while turning over soil or planting flowers is an immediate sign that your lawn needs attention.
How to Check Your Lawn for Grubs
If you notice irregular brown patches and suspect grubs, it is easy to confirm your suspicions before treating the yard.
Take a flat spade or shovel, cut a square hole roughly three inches deep into the turf, and lift the grass flap back. Count the number of grubs you see in that square-foot area. If you find fewer than three grubs, your lawn is healthy and can easily tolerate them. However, seeing ten or more grubs per square foot means your lawn is at risk and requires treatment.
Why You Should Get Rid of Grub Worms?
While a handful of underground insects can actually help aerate the soil, an uncontrolled population of grubs will rapidly turn a beautiful garden into a patchy desert. By destroying the roots, they cut off the grass’s ability to absorb water and vital nutrients. Active grub management is a cornerstone of proper lawn care if you want to keep your yard green, thick, and healthy.
Effective Homemade Remedy Recipes
You don’t need to call an expensive pest control company or saturate your yard with harsh chemicals to handle a grub problem. These natural, homemade sprays are highly effective. Apart from these two homemade remedies there are few more popular ways to control grubs naturally such as coffee grounds, fertilizers and some special herbs. These helpful and homemade recipes can help you to repel the grubs from your lawn without harming the grass.
1. Homemade Garlic Grub Spray
Garlic acts as a powerful natural repellent, and this formula works exceptionally well against Japanese beetle grubs. Combining it with mineral oil helps the solution stick to the grass blades and penetrate the soil.
Ingredients:
2 chopped garlic cloves
1 tablespoon of mineral oil
1 quart of warm water
1 tablespoon of liquid dish soap
Instructions:
In a small container, combine the chopped garlic and mineral oil.
Let the mixture sit for at least 24 hours so the oil fully absorbs the garlic compounds.
Strain out the garlic pieces, then add the warm water and liquid dish soap to the oil. Mix thoroughly.
Pour the solution into a clean spray bottle and apply it directly to the affected areas of your lawn.
2. Lemon and Mouthwash Grub Repellent
This highly effective spray combines the high acidity of lemon juice with the strong scents of mouthwash to discourage adult beetles from landing on your grass and laying eggs.
Ingredients:
2 cups of lemon juice
½ cup of regular antiseptic mouthwash
1 tablespoon of liquid dish soap
½ cup of water
Instructions:
Pour all the ingredients into a clean jar or spray container one by one.
Shake the container vigorously to ensure everything mixes evenly.
Spray the solution thoroughly over the damaged or targeted areas of your lawn. This formula helps break the breeding cycle by deterring future generations.
6 Natural and Proven Ways to Get Rid of Grubs
If homemade sprays aren’t completely solving the problem, you can take more definitive action without relying on harsh synthetic chemical pesticides. Chemical options containing neonicotinoids can wipe out beneficial soil bacteria, harm pollinators like bees, and accidentally poison local birds. Instead, rely on these eco-friendly methods:
1. Welcome Birds to your Lawn or Garden:
Birds are nature’s best pest control. Grubs are a premier food source for many bird species. If you notice birds foraging in your lawn, let them work! To speed up the process, you can turn over patches of damaged turf yourself to expose the grubs, making it incredibly easy for birds to sweep in and feast on them.
Tip: Keep a close eye on your yard to ensure the birds are strictly targeting the underground bugs rather than eating your ornamental garden plants.
2. Use Beneficial Nematodes
Beneficial nematodes are microscopic roundworms that hunt down and eliminate grubs naturally from the inside out.
How to apply: Mix the nematodes with distilled water according to the package directions and add them to a garden sprayer. Spray your lawn in the late evening or at night, as sunlight and heat will quickly kill them. Immediately water your lawn for about 20 minutes after spraying to ensure the soil stays moist and helps the nematodes travel down into the root zone. Repeat the process two weeks later for optimal results.
3. Use “The Chicken Method”
If you or your neighbors keep backyard chickens, you have an elite grub-hunting crew at your disposal. Chickens absolutely love scratching at the dirt to find plump grubs. Letting them roam your lawn provides a double benefit: they will systematically eliminate your pest problem while naturally aerating the soil through scratching.
Tip: Only let the chickens loose under supervision, as they can accidentally damage delicate seedlings or small garden plants if left entirely unattended.
4. Apply Targeted Pesticides Carefully:
If you do choose to use a commercial pesticide, look for specific active ingredients like Bifenthrin, Imidacloprid, or Carbaryl, which kill grubs on contact. These come in both liquid forms and granular formats.
Tip: Timing is absolutely vital. Standard preventative pesticides must be applied in the early summer when the newly hatched grubs are small and feeding near the surface. They are far less effective in the spring when grubs are mature and robust.
5. Apply Milky Spore Powder
Milky Spore is a natural, organic bacterium (Paenibacillus popilliae) that specifically targets and kills Japanese beetle grubs. It is completely safe for children, pets, and beneficial soil organisms. Once a grub eats the spore, it multiplies inside them, safely neutralizing the pest. Application 3 to 4 times a year for a couple of seasons establishes a protective barrier in your soil that can last for over a decade.
Tip: Don’t feel pressured to buy premium or expensive brands; budget-friendly milky spore powders contain the exact same active bacteria and work just as efficiently.
6. Apply Neem Oil
Neem oil is a fantastic organic, multi-purpose remedy for eco-conscious gardeners. Derived from the neem tree, it possesses natural insecticidal properties that disrupt the growth and feeding cycles of grubs while acting as a natural soil conditioner.
Tip: Mix raw neem oil with water and a drop of dish soap, then apply it as a drench across your lawn at night. This prevents adult beetles from feeding and laying eggs while safely repelling the larvae below.
Conclusion:
Now that you know how to identify a grub infestation and have several natural tools at your disposal, you can confidently protect your yard. Choose the method that best fits your lifestyle, and remember to always wear long sleeves and sturdy gardening gloves when applying any treatments. For the health of your turf, stick to one primary treatment method at a time rather than mixing multiple processes, which can stress your lawn’s soil. Keep your yard clean, stay safe, and enjoy a vibrant, grub-free lawn!
