What to Do When Grubs Kill Your Lawn | Tomlinson Bomberger (2024)

Grub damage on lawns is one of the easiest types of lawn stresses to diagnose. Late in summer or early fall, property owners often suspect there is a problem with an area of their lawn. Here is more information on what to do when grubs kill your lawn.

What to Do When Grubs Kill Your Lawn | Tomlinson Bomberger (1)What should you look for with grubs?

There are a few telltale signs to look for. Most times, lawn areas start to lose color compared to others. Sometimes there are holes dug in the lawn as birds, skunks, and other animals dig to get their “grub” on. In a year when there is drought, some areas just simply won’t green back up, leaving property owners suspicious about what is going on.

What are grubs?What to Do When Grubs Kill Your Lawn | Tomlinson Bomberger (2)

Grubs are the larvae of several varieties of beetles that frequent our area in summer. These beetles have one mission for the month or so that they are out – to party! They eat, mate, and lay eggs, then they die. What a life! They lay eggs in soft turf areas and the resulting grubs hatch out and begin feeding. You can’t prevent nature from doing its thing. However, if you think ahead, you can apply a preventive grub control application on your lawn in late spring or early summer, and say goodbye to your grub woes. However, sometimes people choose not to apply this preventive, forget to, or do so ineffectively. This leaves the lawn susceptible to damage.

What to Do When Grubs Kill Your Lawn | Tomlinson Bomberger (3)Grub damage is easy to diagnose. Just simply tug on areas of your turf and look underneath. Since grubs feed on root systems, the grass will pull up like a piece of new sod and the grubs won’t be hard to find. The more grubs you find in a square foot, the worse your problem is. Even if grass is still green, you could still have grub damage, so start hunting and inspecting areas of your lawn. Some years with ample rainfall and mild temperatures will keep the grass growing as grubs are feeding. But make no mistake, it’s time for you to do something about these devastating lawn pests.

What to do about grubs?

Apply Corrective Grub Control

No matter what your lawn looks like, if you are finding lots of grub activity you’ll want to apply a corrective grub control application. This is not the same material used earlier in the year for prevention. This granular material is a quick-control material with little to no residual activity. You will need to water it in thoroughly. Remember, those grubs are down a couple inches below the grass, so you’ll want to dissolve the granular material and get it down there to work. Water it in as soon as possible. Some materials start to lose their effectiveness if not watered in within 24-48 hours.

Seed Areas as Needed

If you have areas of dead turf, you’ll need to re-seed them. Some areas will need to be scraped clean, soil added, and seeded. However, some areas may just warrant slice-seeding to repair them. Either way, they aren’t coming back on their own.

Ramp-up Your Lawn Care Program

If you’ve been taking a minimalist approach, don’t be surprised when you get minimalist results. Preventive grub control is an application almost every lawn care program should include, or have added to it. Make sure you’re covered each year so grubs don’t destroy your lawn again. It’s less expensive to prevent than to fix after the fact.

Grubs can cause some havoc on a lawn. If you’re staring down at your lawn in disgust or frustration, find yourself an award-winning lawn care company that knows how to prevent or remedy your grub problems. If you would like to talk about lawn care options to deal with grubs or other lawn issues, or even to seed to repair your lawn, don’t hesitate to contact us.

What to Do When Grubs Kill Your Lawn | Tomlinson Bomberger (2024)

FAQs

What to Do When Grubs Kill Your Lawn | Tomlinson Bomberger? ›

Rake out the dead material

If there is a lot of dry and dead plant material present, give the area a light rake. Removing any dry and dead material will help the lawn thicken up and recover quicker. Be careful to not remove too much of the grasses runners as it can still grow back and repair from here.

Will a lawn recover from grub damage? ›

Rake out the dead material

If there is a lot of dry and dead plant material present, give the area a light rake. Removing any dry and dead material will help the lawn thicken up and recover quicker. Be careful to not remove too much of the grasses runners as it can still grow back and repair from here.

Can grubs kill an entire lawn? ›

Left unchecked, white grubs in your lawn will continue their destructive course and will eventually sever the roots of the grass so badly, it will be unable to regrow.

What is the best month to put down grub control? ›

Grub preventers must be applied between April through mid-July, as this is when the grub eggs are starting to hatch.

What kills grubs instantly? ›

To kill grubs in the spring or fall, use carbaryl or trichlorfon. Always wear rubber gloves and rubber boots when applying insecticides to turfgrass. Make sure to irrigate the lawn with at least 0.5 inches of water* and allow the grass to dry before allowing anyone or pets into the treated area.

Should lawn be watered after grub treatment? ›

Pesticides for Grub Control

(The active ingredient is listed on the front of the packaging.) Follow label directions carefully. Such pesticides often must be watered in after application; apply at least half an inch of water. Typically this means running a lawn sprinkler for as much as an hour.

Do lawn grubs come back every year? ›

As lawn grubs turn into adult beetles, they leave the soil to mate and lay eggs. Adult beetles have a 1–3-year lifecycle. Adult beetles lay their eggs near their feeding sites in July and August, creating new grubs that dig into the soil and eat grass roots, perpetuating the infestation.

How do you get rid of grubs permanently? ›

Pesticides to Get Rid of Lawn Grubs

Curative: These eliminate existing larvae but won't prevent future infestations. You'll need to water your lawn before and after you apply a curative pesticide to make sure it gets soaked into the soil. The most common curatives include the ingredients carbaryl and trichlorfon.

How long do you have to stay off your lawn after grub treatment? ›

HOW LONG SHOULD I STAY OFF THE LAWN AFTER A TREATMENT? With a pesticide application you should stay off treated areas for 24 hours. HOW LONG SHOULD PETS STAY OFF THE LAWN AFTER A TREATMENT? Pets should remain off treated areas of the lawn for 24 hours.

What does grub damage look like? ›

Here are some common signs of grub damage: Brown, thin patches of grass that do not correlate with drought. If your grass looks brown, has brown spots or patches and the blades of grass are thin and weak, you might have grubs. Grass that is loose and easily rolls up from the sod.

How do I bring grubs to the surface? ›

Apply a preventative grub control product in the spring, especially if you see a lot of beetles around or have had grub problems before. Make a soapy mixture to spray over the trouble spots in your lawn. This will force the grubs to the surface, where the birds will be happy to help you take care of the problem.

How does Dawn get rid of grubs? ›

Applying Dawn dish soap smothers grub worms, and typically kills them quickly. To try, use 1 tablespoon Dawn in one-quart water and spray the mixture on the affected areas of your lawn. Check after an hour or so to see if the grubs are still alive. If they are, spray the worms directly with the Dawn mixture.

Can you use too much grub killer? ›

The maximum number of Grubex applications is one per year. Jonathan Green Grub & Insect Control can be applied up to 3 times per year. Apply your grub control to a dry lawn with a rotary spreader. Make sure to follow the spreader settings provided on the product's packaging.

What does a lawn infested with grubs look like? ›

Grub Signs and Symptoms

Grub damage takes the form of irregularly shaped brown patches on a lawn. It usually makes its first appearance in August is sometimes mistaken for drought harm. Unlike a drought-damaged lawn, grub-infested turf peels up easily from the soil because its roots have been depleted.

Is it too late to treat for grubs? ›

Insecticide treatments after early October are not effective and are not recommended. If you do treat it may not be necessary to treat the entire lawn. Treat grub "hot spots" determined by observation or sampling.

What stage of grubs are damaging? ›

White grubs prefer light clay soils rich in organic matter; aeration; moisture and soil temperature around 25ºC. They have a single generation in a year where, grub (larvae) is the damaging stage and adults are free living.

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