How To Get Rid Of Grub Worms In Saint Augustine


When to Treat for Grubs in St. Augustine Grass?

St. Augustine grass is one of the most extensively utilized grasses in the Gulf Coast areas of the United States, where it is found in abundance. The grass has a great heat tolerance and adaptation to limestone coastlines and sandy soil, making it an excellent choice for hot climates. St. Augustine grass is susceptible to disease and insect infestations, much like all other grasses. This includes white grubs, which are capable of causing significant harm if not dealt with promptly and effectively.

Pest Identification

There are several species of beetles that have white grubs as their young or larval stage, including the masked chafer, Japanese beetles, May and June beetle, and scarab beetle. According to the Utah State University Extension, the insects are the most devastating pest of turf grasses, particularly St. Augustine grass, in the world. Despite the fact that the adult beetles have quite different behaviors and appearances, the white grubs are essentially identical in appearance and produce the same amount and type of damage to grass as the adult beetles.


In all beetles, the larvae are dirty white to gray in color, and they range in length from 3/8 to 2 inches in length. In the soil, the pests form a unique C-shape due to their size and shape. The hue of the head capsule is a dark brownish brown. The arrangement of hairs and spines on the posterior body of the several species of white grubs is the single characteristic that distinguishes them from one another. In contrast to the larvae, the adult beetles are not detrimental to turf grasses. Some insects eat on the leaves of some landscape trees on an irregular basis, although this does not result in any significant harm.

Curative Insecticide Timing

According to the University of Rhode Island Extension, the optimal time to administer curative insecticides to any afflicted turf grass is during the late summer and fall. Avoid treating in the spring since the mature grubs have buried themselves deep in the soil and are difficult to reach with chemical treatments. Treatment should be completed between August 1 and September 15, according to the recommendations. At the second or third instar or larval development stage, insecticides are most effective when used in conjunction with other methods.


Make certain that the grass is cut short and dethatched prior to application of the treatment.

Preventative Insecticide Timing

Preventative insecticides, as the name implies, are applied prior to egg hatching and larval maturation in order to control pest populations before they become established. Applying preventive insecticides early in the season, about a month before the eggs hatch, and when the larvae are very small and eating close to the soil surface, is the most effective strategy.

Treatment should be completed between April 1 and August 15, according to the recommendations. Insecticides such as imidacloprid and halofenozide are highly recommended.

Grub worms destroying my St. Augustine

I applied some pesticide granules to the brown patches, but they appear to be expanding even after I applied more. Do you have any suggestions or advise on how to get rid of them? Brown Patch (fungal) is most likely the source of the problem, not grubs. The majority of beetle grubs will not harm your grass or grass roots, so don’t worry about it. I was under the assumption that grubs may become a major problem and cause exactly what he describes? I’ve encountered a similar issue in the past. After a few failed attempts, I was able to locate several grubs in some unexpected places.

  1. To check whether it helps, I sprayed some pesticide on the ground that is said to be effective against them.
  2. They are quite easy to identify.
  3. A certain time of year (typically around June in Texas) is required for the treatment of grubs, and it is recommended that you use a chemical designed specifically for grubs.
  4. Grubs are inevitable if you have june bugs in your garden.
  5. The use of grubicide, which is grub-specific, is normally suggested for therapeutic purposes.
  6. Well, I’ve dug a little and discovered several worms as well as some small little balls, which I believe to be eggs.
  7. If not, do you have any other recommendations?

Using a 1x1x1 hole, count the number of grubs in the hole; if there are more than 5, you have a grub infestation.

After October, they dig further into the soil until March or April.

When you pull on the runners, they should come up easily, and the grass should nearly roll up like a carpet when you walk on it.

Although digging them up and bashing them against the pavement is somewhat entertaining, they produce a pleasant “fwhap” sound when they hit the deck.

quote: If you have Brown Patch, will the StAug ever return, or will you have to pull up the sod and lay down fresh pieces of carpet?

Yes, the st augustine will return the following year, but the brown patch will most likely return in the same location the following year as well.

Keep in mind that observing the pattern of dead grass might be a simple way to determine whether or not you have grub worms.

If the rot appears in spots, it is the brown grass rot that is being discussed.

Naturally occurring nematodes per square foot of soil 6″ deep number in the hundreds of thousands per square foot. I get a kick out of seeing folks spend their money on that kind of garbage. Bayer Advanced’s Grub Killer Plus has a 24-hour kill time.

Grub Worm Control: Tips On How To Get Rid Of Lawn Grubs

However, the brown areas appear to be expanding despite my use of pesticide granules. Do you have any ideas or suggestions about how to get rid of them? Rather than grubs, it’s more likely to be Brown Patch (fungus). The majority of beetle grubs will not harm your grass or grass roots, so don’t worry about it! I was under the assumption that grubs may become a major problem and do precisely what he is saying. This is an issue I’ve encountered before. My efforts culminated in the discovery of grubs after a number of failed attempts.

  1. To check if it helps, I sprayed some pesticide on the ground, which is intended to kill them.
  2. Their location is obvious.
  3. Grubs must be treated at a specified time of year (typically around June in Texas) and it is better to use a chemical that is specifically designed for grub control.
  4. Grubs are inevitable if you have june bugs in your home.
  5. Grubbicides, which are grub-specific, are typically prescribed for therapy.
  6. I delved a bit further and discovered some worms as well as small round balls, which I believe to be egg shells.
  7. Will this help?

If you have Brown Patch, will the StAug ever return, or will you have to pull up the sod and lay down new pieces of carpeting and flooring?

The majority of grub damage happens between September and October.

Dylox should be used in the spring.

That is correct; there is nothing you can do to stop them at this time, as Spicewood stated.

quote: If you have Brown Patch, will the StAug ever return, or will you have to pull up the sod and lay new pieces of carpeting?

Certainly, the st augustine will return the next year, but the brown patch will almost always return in the same location.

Keep in mind that analyzing the pattern of dead grass might be a simple way to determine whether or not you have grub worms in your lawn.

The brown grass rot is being described if it is found in places on the lawn.

Naturally occurring nematodes per square foot of soil 6″ deep number in the hundreds of thousands per square foot of soil. This is one of my favorite things to see people buy. The Bayer Advanced 24 Hour Grub Killer Plus is a pesticide that kills grubs for 24 hours straight.

How to Detect Grub Worms

Knowing how to identify grub worms is critical to successfully treating them. From late summer to early fall, visible grass grub damage can be noticed on the lawn. Keep an eye out for uneven brown areas of lawn that are easy to pull away from the soil, much like a carpet does. Digging up tiny parts of lawn might help you identify the degree of an infestation or which areas require treatment. Lawn grub management and treatment are recommended when there are more than five grub worms per 14 square foot (0.02 square meter).

When to Apply Grub Worm Treatment

Once grass grubs have been discovered and treatment is required, you must know when to administer grub worm treatment to avoid damaging your lawn further. Late summer or early fall is the optimum time to treat grub worms since they are still little and near to the surface when they are treated. During the spring, grub worms are less sensitive to treatment because they have grown too large and have stopped eating. As a result, pesticides are less effective than they formerly were. It can also be challenging during the spring rains, because applications may be washed away.

Dylox is the most effective and fastest acting medication available for the treatment of falls.

These pesticides kill pests before they lay their eggs, preventing an infestation from occurring by eliminating the bugs and any hatchlings.

Natural Grub Treatment

There are various solutions available for individuals seeking a more natural grub treatment as a means of getting rid of grass worms on their property. All of these medications are believed to be safe and effective. There are several types of nematodes available at most garden centers, including milky spore, neem oil, and nematodes.

  • Lactospore is an infectious illness that may be used to efficiently cure grass grubs while also being non-toxic to the environment. To treat afflicted lawn areas, spores are sprayed on the grass and infect lawn grubs as they feed. The grubs die and degrade, releasing extra spores into the soil, which helps to avoid subsequent infestations. Neem oil is a botanical pesticide with insecticidal qualities that may be used to control grub infestations. Neem oil is more effective as a repellent against Japanese beetles and lawn grubs, as it prevents them from laying eggs, growing, and eating. In addition, beneficial nematodes are employed as a natural grub treatment, in which neem oil is combined with water (according to directions) and sprayed over afflicted grass areas. These small, soil-dwelling worms discharge bacteria into the soil, infecting and killing grass grubs as a result of their presence. It is possible to purchase nematodes in liquid form, which may be sprayed over the afflicted regions.

Knowing how to spot grub worms and how to eliminate grub worms will put you in a better position to deal with the problem more successfully. The information in this page was last updated on

Grub Worm Killer: 10 Ways To Get Rid Of Lawn Grubs

Summary: Beginning with the recognition of the indications of grub damage, which may be noticed when brown patches of grass continue to develop as a result of the Japanese beetle that lives in the soil, grub worm treatment can be effective. The majority of insecticides used by homeowners are for the treatment and management of grub issues. Take a look at this. Question: Our grass has brown areas that look to be expanding and are becoming more noticeable. It is possible to raise the grass if you grasp it.

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Vanessa from Somerset, Kentucky Answer: Vanessa, it appears that the damage you are describing is caused by grub worms as a result of a grub infestation.

Japanese beetle grubs may be at work if you notice patches of brown grass growing in an area that is constantly becoming larger and larger.

These grubs feed on grass roots, causing them to be cut 1 to 2 inches below the surface of the soil.

On warmer days, newly wounded grass begins to wilt fast. Sometimes, a thorough soaking of the soil or grass is all that is required for the soil or turf to reroot and live.

How To Get Rid Of Lawn Grub Worms – ControlTreatment

When you discover Japanese beetle grubs, the most effective technique of control is to apply a pesticide. Many years ago, an application of six pounds of ten percent DDT or five pounds of five percent chlordane dust per 1,000 square foot of ground would be sufficient to deter the grub worm as soon as the pesticide made its way into the feeding zone. but those were the days. There are various insecticides available on the market today that may be used to destroy the grub worm in the lawn and garden.

Diazinon is effective, but the insecticide’s drawback is that it can take up to three weeks to completely eliminate the grubs in the treated area.

The When Of Grub Worm Treatment

Grubex from Scott’s is an efficient and long-lasting pest control, however, like diazinon, it can take up to three weeks to completely eliminate grub wroms under certain conditions, including high humidity. Turf grass damage can be prevented by spraying pre-emergent insecticides in the spring through late summer before insects hatch. Probably the most effective period to apply is around July, once you’ve determined that the number of adult grubs is high and that soil moisture is low enough to keep the beetles’ egg laying focused.

What Is A Grub Worm?

The grub worm is the larval stage of a variety of insects, with the great majority of them belonging to the beetle family as their source of nutrition. This is hardly surprising in and of itself, given the fact that the majority of insects are members of this group. Lawns are particularly vulnerable to the destruction caused by Japanese beetle larvae, which are also the most serious danger to the population of the grub worm beetle species in North America. Around the month of August, grub-infested turf is at its worst.

  1. Because the grub worm destroys roots and whatever else it may discover in earth places is terrible enough, they also bring with them another unfavorable feature to the table.
  2. This may be a disastrous mix for your grass as well as the grubs that live in your garden.
  3. Preventive measures are always the most effective kind of counterattack.
  4. Natural law dictates that if they are not present, they are unable to cause any harm.

If you have a worm infestation in your lawn, what steps can you take to prevent them from appearing or what steps can you take to deal with them after they have appeared? The good news is that there are a number of viable options available to you.

How To Get Rid Of Grubs For A Healthy Lawn?

You will get knowledge about the following:

  • When should grubs be treated
  • How should grubs be killed How to produce your own grub killer at home
  • Techniques for controlling grass grubs in general
  • Learn how to naturally get rid of grubs. The most effective method of getting rid of grubs

1. Do Not Mow Your Lawn

For the grubs to be able to enter into the earth in the first place, the adult beetles must first lay their eggs in the ground. As it turns out, lawn grubs are not very fond of laying eggs in long grass.Lawn grubs are not particularly fond of laying eggs in long grass! Naturally, you can trim your grass, but leaving it somewhat long will assist you avoid the insects mistakenly believing that your home is an egg-laying facility. There are various methods of keeping the small lawn and garden pests at bay, such as the ones listed below:

2. Over-Seeding Your Lawn

It is more better to overseed your lawn in the spring and early fall than it is to overeat, and in this situation, it may be quite useful for a generally healthy grass. Once again, grubs are not only an issue, but they also attract other problems. This is the worst case scenario for grub infestations because when these bugs devour the roots of your plants, they end up as food for an animal that will cause similarly significant harm to your garden. In the spring and early fall, over-seeding your lawn will merely make the grass too deep and thick for adult beetles to find it conducive to their feeding and reproduction.

3. Fertilizing Your Lawn A Valuable Ally

The use of fertilizer can be quite beneficial for dealing with insect-related plant issues. People are beginning to be wary of this procedure these days, but in actuality, it is still the most effective weapon against some pests. For maximum efficiency, the fertilization procedure should be carried out in two phases: the first phase should be carried out during the fall months, and the second phase should be carried out during the early spring lawn care season. Put down a covering of dead leaves after the first phase if at all feasible; this will help to enhance the fertilizer’s effectiveness during the winter months.

4. Water The Lawn Is Not Always Good

PinLawn grub eggs have a dirty little secret: if there isn’t enough water available, the eggs will fail to hatch. While it is true that your grass need regular watering during the warmest months of the year, and strangely, grub eggs hatch around the same time (early August), you may avoid this problem by altering your lawn’s watering regimen. As you can see, your grass is quite content with receiving a large amount of water all at once, rather than having you water it over a period of many days.

5. Applying A Beetle Grub Treatment

Fertilization can help you avoid the problem, however poisoning is a last resort if you discover that the grub eggs have already been placed by the time you act. Certain garden pesticides, such as imidacloprid and halofenozide, include strong – but not very harmful – compounds that are not harmful to people. Merit pesticide (available on Amazon) is an example of such a product, and it will harm the grubs once they hatch. It’s important to do your research on the product, since some might have an adverse effect on (or even kill) the birds that would otherwise consume the grubs.

“Mix the neem oil with water according to the directions on the container, then liberally spray the diluted solution on the afflicted areas.” More information on using Neem oil to control lawn grubs may be found here.

6. Wasp attack

Parasitic wasps, despite their bad image, can really be useful insects for a variety of different reasons. In particular, certain varieties (ground wasps or hornets, which are actually wasps) prey on grubs and will actively seek them out in order to take care of your problem. Okay, they’ll be motivated more by their predatory tendencies than by your goals and hopes, but the ultimate outcome is what matters, right? Related: Organic Grub Control and Organic Wasp Control are two topics that you should know about.

7. Attract Birds To Eat Lawn Grubs

Birds, who are Mother Nature herself, launch yet another counter-offensive. Despite the fact that birds may create quite a commotion on their own, they are nonetheless useful to your garden in the long run. You should take precautions to keep them away from your seeds, but they will also feast on the grubs, which is ultimately what we want. What methods do you use to entice birds to your garden? It is simple. Simply place a bird feeder in close proximity to the troublesome regions and allow the birds to feast on it.

8. Kill Grubs In Your Lawn With Beer

Yes, not just you, but also these slimy little lawn adversaries, are likely to be big fans of beer (sorry if I’m totally off the mark here). This may seem like a waste of a nice beverage, but you don’t have to use the best stuff because they aren’t very particular about what they eat or drink. Dig a hole large enough to accept the plastic container of your choice (it should not be too large or too high), then pour the contents into the hole. After then, all that remains is for you to wait until the next morning.

This may be conceivable in a limited area, but it is not particularly practical on a large lawn, for obvious reasons.

9. Apply Milky Spore Grub Control Mix aka Grub Worm Killer

When it comes to Japanese beetles, this commercially available approach known as ” Milky SporeDisease” is quite effective. It is mostly effective as a preventative measure. It’s an organic substance that destroys the larvae of Japanese beetles, according to the manufacturer. Anytime during the growing season, from spring to autumn, a spreader can be used to apply it. It is expected to kill grub for 15 to 20 years after installation. This substance is non-toxic to all other living things and will have no effect on birds, bees or beneficial insects.

a 20 may provide covering up to 7,000 square feet in size.

  • Organic compound that attacks the larvae of Japanese beetles
  • Use a spreader to apply it any time of year, from spring to autumn. Grub-killing technology that lasts for 15 to 20 years, providing you with the most comprehensive coverage
  • Up to 7,000 square feet of coverage may be obtained with just 20 pounds.

10. Apply Parasitic Nematodes To Your Yard

Although it may seem alarming, parasitic nematodes will mostly impact grubs, albeit not all species are affected.

  • Beneficial Nematodes are a natural and very effective technique to combat soil pests
  • They are also inexpensive. Kills More than 200 distinct species of soil-dwelling and wood-boring insects have been identified. Simple to use and completely harmless to people and pets
  • 10 million Nematodes are sufficient for the prophylactic control of soil-dwelling insects over an area of about 2,000 – 3,000 square feet of soil surface area
  • For the greatest results or for severe infestations, this amount should be increased. It is advised that you release many times.

The approach will work better against some kinds of white grubs than others, but it is particularly effective against the most common form (Japanese beetles). What is the significance of this?

The simple answer is that if your lawn has enormous brown patches and the grass can be lifted up like a poor toupee with a little tug, you have grubworm damage or the larvae of Japanese beetles. After reading this article, you should have some ideas on what you can do to solve the problem.

Diagnosing St. Augustine’s Problems

Have you ever had a buddy who showed up at your door with a bunch of additional “baggage?” The majority of us have. St. Augustine, Florida, has a lot of baggage, and identifying its maladies may be difficult even for the most experienced professional turf workers. I’ve been growing St. Augustine since I was ten years old (with the exception of five years in Ohio), so I consider myself equipped to assist in sorting through the fog. Here is a list of the most prevalent St. Augustine issues, organized roughly chronologically according to when they will manifest themselves, from early spring to late fall.

  1. Take Care of Any Root Rot (TARR) Take Care of Any Root Rot (TARR).
  2. The grass is sluggish in its efforts to green up.
  3. Because, as the name indicates, the fungal organism has destroyed the grass roots, this is a very important symptom to watch for.
  4. THE FACTS: According to studies conducted at Texas A&M University, spreading a layer of sphagnum peat moss one inch deep over the afflicted region and several feet beyond the margins of the yellowed areas of grass will have a significant positive impact.
  5. In my opinion, many other St.
  6. (See below for further information about chinch bugs and shade.) The white grub worm is a kind of worm.
  7. The spring season is when the damage manifests itself.

Dig several square-foot patches in the affected regions and you will find 5 or 6 grubs per square foot, depending on how many square feet you dig.

It is possible to treat white grubs as soon as they hatch using pesticides that are authorized for this purpose, although this is not the best moment to do so.

MY PERSONAL OPINION IS THAT: Grub worm damage is not nearly as prevalent today as it was during the pandemic infestations of the 1970s.

People must be certain that they are seeing numerous grubs per square foot and not just a few grubs during the course of a day spent working in the landscape.

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Grass may overrun populations that are smaller in size.

Leaf spot that is gray in color.

The disease is caused by a fungal pathogen, however the progression of the sickness is substantially hastened by the application of nitrogen.

A diamond-shaped, gray-brown lession will appear on individual blades and even runners, with a diameter somewhat larger than a pinhead.

It may occur in both the sun and the shade, and it can severely damage or even destroy lawns in certain regions.

In the summer, chinchillas can be found.

Insects that are little and black with white diamond-shaped spots on their wings.

Never in the shade, and it won’t appear until late June through August at the earliest.

Every year, I’ll go back to the same portions of the yard.

Watering, as previously said, is ineffective.

CONCLUSION FROM MY PERSONAL OBSERVATION: During my professional tenure, 2016 was the most severe year I have ever witnessed for chinch bugs, and many of the problems people are seeing this spring are really residual dead grass from chinch insect damage that occurred late summer and early fall in 2016.

  • I feel that chinch bugs are/were a significant contributor to the grass problems this spring.
  • There is a brown spot.
  • It is a leaf disease that causes the blades to rot where they join to the runners, causing them to die.
  • Runners and roots continue to grow strong and robust.
  • Augustine lawns in South Texas that ordinarily do not turn brown from the cold did so this year.
  • MY PERSONAL OPINION IS THAT: The majority of people who believe they have brown patch are actually suffering from another ailment.
  • The cold snap in January 2017 was severe, but I don’t get the impression that it killed a great deal of people in St.

Nonetheless, the Floratam cultivar is particularly winter-tender, and it is widely planted throughout the southern third of the state, particularly in the Rio Grande Valley.

Other types, on the other hand, were most likely not.

In the shade, St.


The number of phone calls I receive on the radio is recorded, and there have been 450,000 of them in my 40 years in the business.

Augustine throughout the majority of the state of Texas (fescue for the Panhandle).

Augustine, require 5 to 6 HOURS OF DIRECT SUNLIGHT EVERY DAY.

(It’s something I’ve done as well.) If you don’t get enough sunshine, there won’t be any grass to grow on your property.

Tree pruning will not be of much assistance in the long run.

SYMPTOM OF IMPORTANCE: Unless your tree’s trunk looks like an arrow in a bulls eye, and unless the thinning grows worse as you travel toward the tree’s outside drip line, shadow is the reason, and you’re squandering money by not investing in more sod.

It all comes down to a lot of shadow. Keep in mind that no sod farm is located under shadowed circumstances. They’re all bathed in sunlight. (Extracted from a Facebook post by Neil on April 13, 2017 and modified for use with e-gardens.) Neil Sperry has posted a message.

White Grub Damage Looks Like Water Stress Even When Wet and The Turf Is Not Rooted in the Soil

Pest grubs have wreaked havoc on a lawn in PinelLAS County, Florida. Grub Damage Is a Replica of Water Stress White Grub damage may be confused with water stress, and water stress can be confused with grub damage — the two are difficult to distinguish. Try kicking and scuffing your shoe across the grass, as if you were attempting to move a throw rug. If it doesn’t move, the irrigation system has to be repaired. If it moves, as if it were a throw rug on a terrazzo floor, you have grubs on your hands.

  1. An easily pulled white grub was discovered just below damaged grass and was simply taken out of the soil.
  2. Grubs have a preferred location in the grass where they like to hang out.
  3. If grubs are the source of the problem, pulling on the water-stressed sod should allow it to simply lift from the soil.
  4. Grub Biology is a term used to describe a type of biology that is grubby.
  5. During the winter, the grubs bury deeper into the earth and emerge as beetles in the springtime.
  6. Please keep in mind that discovering one or two grubs in a lawn does not always imply that your lawn has a grub problem.
  7. It is when they overpopulate a region that they create devastating consequences.

Control Grubbs are almost certainly going to be available to you every year, and most likely in the same location as before.

Make careful to spray the pesticide at least 2 – 3 feet beyond the area that has been damaged.

Grubbs are treated with a synthetic botanical pesticide for sub-surface insects beginning in mid-June and continuing through August.

Post-Damage Recuperation If you have grub damage, spray the area with an effective pesticide and turn on the water.

RickOrrAPL Pest Control is a pest control company owned by Rick Orr.

Rick has been working in the green sector since 1980, mostly with golf courses, resorts, and major residential complexes.

Throughout his career, Rick has earned certifications as an arborist, landscape and irrigation contractor, and adjunct lecturer for Environmental Horticulture (SPC) at the University of South Florida.

Agronomy studies included entomology (bug science), which was a subset of entomology.

The transition from lawn spraying to house pest management was a logical progression – the technology, procedures, and products utilized for home pest control are all adaptations of those used for grass spraying.

APL Pest Control is a family-owned company that provides pest control services to both residential and commercial locations in Pinellas County, Florida.

For more information about APL Pest Control, please visit their website.

A range of topics are available for Rick Orr to lecture about at your HOA, community or professional association, or garden club, and he is willing to travel to your location. For booking information, you may reach Rick through his social media accounts on Facebook, Twitter, LinkedIn, and Instagram.

What is a Grub Worm and How to Control Them

Have you spotted any small white grubs in your soil? If so, you are not alone. White grub worms are a major annoyance in many homeowners’ lawns in the United States, where they may be found in large numbers. In the next essay, we’ll take a closer look at the grub worm, which is one of the most infamous pests on residential lawns. Once you’ve learned more about the grub worm and have been able to properly identify an infestation, you can begin planning about how to get rid of them and prevent other infestations from occurring.

What are grub worms?

There are many people who are curious about the term “grub worm.” As a starting point, it’s crucial to understand that scarab beetles, the larval form of which grub worms are, may be found in many lawns and gardens across North America—particularly in Florida’s humid temperate climate. Because Florida does not have harsh winters, grub worms are able to grow and reproduce all year long throughout the state. Grub worms, sometimes known as white grubs, can be found in the soil, where they feed on the roots and thatch of turfgrass, causing damage to the lawn.

What do grub worms turn into?

Grub worms mature into beetles that emerge from the earth when they reach the adult stage. The type of beetle species that is present is determined by the type of grub worm that is present. As the beetles devour the leaves of your grass and other plants in your garden, you may begin to see the harm they are causing. Adult scarab beetles come in a variety of species, some of which are listed below:

  • Green June Beetles, Japanese Beetles, June Beetles, Masked Chafers, and May Beetles are all names for the same insect.

A green June beetle, a Japanese beetle, a June beetle, a masked chafer, and a May beetle are depicted in the image above, from left to right.

What does a grub worm look like?

All grub worms have bodies that curve into a C shape, and their heads have a yellow-brown color with yellow stripes. They have six legs, which are positioned near the front of their bodies, and an abdomen that is black in color due to earth particles that have filtered through their exoskeletons. Depending on the kind of grub worm, the length of a grub worm might vary significantly. They range in size from a quarter inch to two inches in length, and their cream-colored bodies make them simple to distinguish from one another.

What do grub worms feed on?

It is possible to find Grub worms on the roots of almost any warm and cold season turfgrass species, which causes the grass to get damaged or even die entirely in some cases as a result of their feeding habits. They don’t have a strong preference when it comes to the sorts of turfgrasses that they eat on. In addition to Bermuda grass and zoysia grass, bahia grass and centipede grass, grub worms may be seen feeding on the roots of Kentucky bluegrass, tall fescue and St. Augustine grass amongst other types of grass.

How do grub worms damage grass?

Grub worms are a type of worm that lives under the soil’s surface and feeds on the roots of turfgrass during the larval stage of their lifecycle.

It is via the roots that turfgrass obtains water and other nutrients in large quantities. Grass will perish if it does not have roots. Grub worms will cause harm to grass, but in severe circumstances, they can entirely destroy an entire yard of grass.

What time of year do grubs damage lawns?

Grub worms can be found almost anywhere in the world at any time of year, though their availability may vary depending on your geographic location. The majority of the signs and symptoms of damage will typically appear early in the year, around the spring season, or later in the year, around the fall season. You may notice that your grass takes a bit longer to green up if you have a strong infestation in the spring. This is a strong indicator of a grub worm infestation. The opposite is true in the later months of the year, when you may realize that an entire portion of your grass has perished.

How do I identify a grub worm infestation?

If you are unable to personally observe a grub worm, diagnosing a grub worm infestation might be challenging. This is due to the fact that they reside underground. The symptoms of an infestation include overall thinning or yellowing of grass, which is quite similar to the symptoms of other insect infestations such as chinch bugs, as well as other factors such as drought or nematodes. Stepping on the lawn in the spring and feeling it for spongeiness or bouncencyness might help you identify whether you have a grub worm infestation.

This indicates that the roots have been severely damaged.

Look for grub worms and dig them out with your hands.

How do I treat a grub worm infestation?

Control of the Cultural Environment Maintaining a healthy, well-maintained grass is the most effective strategy to reduce grub worms through cultural practices. Follow a seasonal care plan for your grass type, ensure that it is growing in good soil, correctly install new grass, pick the appropriate grass for your location, aerate, dethatch, mow, and water your lawn as needed, and monitor the health of your lawn. When a grass is thick and healthy, it is more able to endure the external stress produced by insects and vermin.

  1. You might want to think about investing in a fertility program like Lawnifi ®.
  2. Choose between subscribing to get seasonal Lawnifi fertilizer boxes throughout the year or purchasing each seasonal box on an individual basis.
  3. More information on Lawnifi may be found at or by reading Why Use Lawnifi Fertilizer?
  4. Chemical Control is a term that refers to the use of chemicals to control a situation.
  5. Grub worms can be killed with products that are readily available to the general public.
  6. Dylox 6.2 is an excellent product to use on severe grub worm infestations since it is effective against second and third instar grub worms on contact and is non-toxic to humans and animals.
  7. Certain treatments that are effective against annual grub worms may not be effective against grub worms that survive for numerous years.

Dylox 6.2 will kill grub worms regardless of where they are in their life cycle at the time of application. It is critical that you read and adhere to the application directions for each product to the letter.

How do I prevent grub worms?

If you are concerned about grub worm infestations in your grass, you should use an insecticide to prevent them from occurring. One application is typically required every year, after which you are free from having to worry about it for the remainder of the year. Use the same items as described above and adhere to the application directions. Even if you were successful in eliminating grub worms as an issue, you may encounter a different type of bug or pest. For additional information on insect identification, see Insect Identification.

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A Natural Way to Rid the Grass of Grub Worms

When it comes to a grub worm infestation in your lawn, insecticidal sprays or drenches aren’t always the ideal strategy to use. In addition to pesticides, natural management measures can effectively eliminate grub worms while causing no harm to beneficial animals like as bees. Pest infestations such as white grubs and other insect larvae may be defeated by encouraging healthy development in your lawn as the first step in preventing them. Furthermore, you can overseed with grass types that are naturally resistant to pests or apply a nematode insecticide to control the infestation.

Cultural Control of Grub Worms

Grub worms can cause significant harm to grass, yet healthy, vigorously growing grass can withstand an infestation and recover quickly. Before you turn to alternative methods of management, be sure that you’re providing your grass with the necessary treatment to withstand a grub worm infestation.

  • You should not irrigate your grass more than twice a week, but you should irrigate extensively and prevent frequent light waterings.
  • Lawns require nitrogen as well as other nutrients when they are growing. While there is no universal guideline, 2 to 4 pounds of nitrogen per 1,000 square feet throughout the course of the growth season is a decent starting point, but this might vary depending on the grass variety.
  • You should avoid cutting your lawn too closely since this can deplete the nutrients that the grass needed to outgrow an infestation of grub worms. Tall fescue (Festuca arundinacea, USDA zones 4 through 7) and perennial ryegrass (Lolium perenne, USDA zones 3 through 6) are examples of cool-season grasses that should be 1 1/2 to 3 inches in height when planted in spring. Mow warm-season grasses at a height of 3/4 to 1 inch, such as bermudagrass (Cynodonspp., USDA zones 7 through 10) and St. Augustinegrass (Stenotaphrum secundatum, USDA zones 8 through 10)
  • Aeration and dethatching on a regular basis also assist to encourage healthy growth that is resistant to grub worms. Make use of an aerator to remove soil plugs from your lawn, and a power rake, mechanical dethatcher, or vertical mower to remove thatch from your grass. Dead grass and other plant waste form a mat surrounding grass blades, which is referred to as thatch.

Controlling Grub Worms Naturally

Aeration and dethatching on a regular basis also aid in the promotion of healthy growth that is resistant to grub worm infestation. Make use of an aerator to remove soil plugs from your lawn, and a power rake, mechanical dethatcher, or vertical mower to remove thatch from the grass. Dead grass and other plant debris form a mat surrounding grass blades, which is referred to as “thatch.”

Controlling Grub Worms Using Nematodes

A number of nematodes that prey on grub worms are commercially marketed as natural insecticides. Use a grub worm control product that contains Heterorhabditis bacteriophora to keep grub worms from infesting your grass. Take time to thoroughly read the product label before preparing and applying the insecticide in accordance with the instructions. If the soil is wet, nematodes will perform best, and they should be applied during cold hours of the day, when the soil temperature is approximately 59 degrees Fahrenheit.

White Grubs in Texas Turfgrass – what is a white grub

By: Michael Merchant, Stephen Biles, and Dale Mott, among others White grubs are the larval stage of insects generally referred to as May or June beetles, depending on where you live (or Junebugs). In Texas, there are almost 100 species of these beetles, the vast majority of which do not inflict considerable economic harm to crops or horticultural plants. A few species, on the other hand, are known to cause significant harm to turfgrass and other cultivated plants. White grubs, often known as grub worms, cause damage to grass by eating on the roots and other subterranean plant portions of the turf plant.

  • Turf that has been severely damaged can be pulled by hand or rolled up from the ground as if it were a carpet.
  • Most lawn damage occurs throughout the summer and fall months on warm-season grasses such as bermudagrass, zoysiagrass, St.
  • Augustinegrass, and buffalograss.
  • Adult white grubs, sometimes known as May or June beetles, are attracted to lights at night and are typically found in clusters.
  • However, cool season grasses are more commonly attacked by a May beetle, Phyllophaga congrua, than they are by the June beetle.
  • Cyclocephala pasadenae and Phyllophaga submucida are two more white grub species that have been reported as pests in Texas turfgrass on rare occasions.
  • This kind of relatively big grub feeds mostly on decaying organic materials and does not generally cause harm to turf; nonetheless, the burrowing activities of this species can cause damage to turf.
  • It is common to see green June beetle larvae resting on the grass surface throughout the day at such areas, which may be identified by little mounds of dirt on the lawn surface.

Adults of the green June beetle are around one inch long and are velvet green on the top and metallic green on the underside. Flying throughout the day allows the adults to graze on overripe fruit.

Life Cycle

A year is required for the majority of turfgrass-feeding white grubs in Texas, including the June beetle and the southern masked chafer, to complete their life cycle (a 2-year cycle is suspected in a portion of the grub populations in north Texas). The development of the May beetle, Phyllophaga congrua, takes around two years. Because it will be easier to understand, the following discussion will be confined to species having one-year life cycles. Adult beetles emerge from the earth to mate once a year, usually in the late spring or early summer.

  • Within about two weeks, the eggs hatch into microscopic white grubs that feed on the roots of grasses and other plant material.
  • Adults emerge from the pupal stage when environmental circumstances are suitable, which is often in the early- to mid-summer months.
  • Adult.
  • The June beetle and southern masked chafer emerge from the earth and take to the air at night, generally after a considerable amount of rainfall or irrigation has been experienced.
  • If you’re flying at night, large numbers of adult beetles (mainly males) may be attracted to illuminated windows or other sources of illumination.
  • As a result, turning off outside lights during adult flying times may not be a significant factor in reducing eventual white grub infestation.
  • Female beetles bury their eggs in the earth after mating by digging 2 to 5 inches into the soil.


After hatching, the white grub goes through three larval life stages, known as instars, before becoming a fully fledged adult.

The development of first- and second-instars to the next life-stage takes around 3 weeks for each.

Because of their vast size (12 to 1 inch in length) and ravenous appetites, third-instar larvae are responsible for the majority of turfgrass damage.

Damaged grass does not develop as aggressively as healthy turf and is highly sensitive to drying out, which is especially true in the summer months.

During this phase of dormancy, white grubs conduct little or no eating and inflict little damage to the environment.

Spring and winter treatments for white grubs with one-year life cycles are unsuccessful in preventing grass damage in the vast majority of cases.

It is during the pupal stage, which follows the third instar, that the white grub transforms, or metamorphoses, into an adult beetle, which is the most dramatic of the life stages.

This stage of life starts throughout the spring and lasts around three weeks in length.

In little clay cells three to six inches below the surface of the soil, pupae can be discovered laying dormant. Treatments for white grubs administered during the pupal life stage are both ineffective and superfluous in nature.

Managing White Grubs

Being able to recognize when you have an issue. There are irregular-shaped regions of weaker or dead grass that may be noticed in a lawn that has been affected by white grub damage. Turf that has not been badly harmed lacks vitality and is more susceptible to invasion by weeds. In some parts of the state, damage might develop at any time between the months of June and October, depending on where you are. Because of the damage caused by white grubs, turfgrass has a weak root structure and is more readily removed from the soil.

Turfgrass normally recovers from white grub damage by the end of the season or the beginning of the next spring.

Take-all Patch is most common in the spring and early summer, and may be identified from other types of patch by the rotten appearance of its roots.

Some lawns in Texas never suffer from white grub damage, however others are continually harmed year after year.

For those who wish to reduce their usage of pesticides and don’t mind sampling for white grubs, the fast choice guide on page 6 is a good place to start.

Examine multiple soil portions that are at least 3 to 4 inches broad and 4 inches deep to determine whether you need to treat for grub infestations (sample sandy soils to greater depths).

Remember to cover regions around the margins of probable grub damage as well!

Controls that are not chemical in nature.

Beneficial nematodes, which are found in the genera Steinernema and Heterorhabditis, are small worms that prey on white grubs and other soil-dwelling insects, and are thus considered beneficial.

When it comes to commercial nematode treatments, they are often intended to be combined with water and administered to lawns with either a hose end or a hand-held sprayer.

Nematodes require a sufficient supply of moisture in order to be able to descend down into the soil where grubs are consuming them.

This species of worm poses no danger to humans or landscaping plants, and it is an environmentally friendly choice for individuals who choose not to use pesticides on their lawn.

Spiked sandals, which are often used for aerating turf, have been tried and shown to be effective in suppressing detrimental grub populations.

Several garden supply catalogs have these sandals, which are really comfortable.

When it comes to controlling white grubs, timing and chemical application are crucial considerations.

These remedies, on the other hand, must be administered early enough to destroy the smaller larvae (those less than 12 inches long).

The insecticides imidacloprid and halofenozide are the most often used nowadays for the control of white grubs.

Merit®, Bayer Advanced LawnTM Season Long Grub Control, and Scott’s® Grub-Ex® are some of the brand names for imidacloprid products.

If halofenozide is administered too late, after grubs have reached the third instar of their life cycle, it will be useless.

Fortunately, both halofenozide and imidacloprid may be sprayed early in the season and remain active in the soil for a long period of time.

In southern Texas, pesticides for white grubs should be used in early to mid-June.

In lawns where grub damage is already obvious and bigger grubs are present, use treatments containing trichlorfon or carbaryl to control the grub population.

This is especially true in clay soils.

Immediate watering-in of liquid formulations with 12 to one inch of water following application will guarantee that pesticides reach the root zone.

This will reduce the likelihood of exposure to people, pets, and wildlife.

If the soil is damp or difficult to penetrate, it may be necessary to provide two or more irrigation treatments.

Watering the soil before applying pesticides, especially when the soils are dry, might increase the efficiency of insecticides by making them more effective.

Grubs are more likely to be contacted by the pesticide treatment as a result of this.

Thatch is the collection of dead plant debris, such as grass stems, between the soil surface and the turfgrass leaf.

The findings of recent study indicate that many pesticides are unable to penetrate thatch, preventing them from reaching the soil and lowering their efficiency.

Excessive thatch building is more common in hybrid bermudagrasses, St.

The use of mulching mowers to recycle grass clippings should not result in the accumulation of thatch on lawns that are routinely mowed.

When insecticides are used in excess, they can sometimes cause more issues than they solve.

The majority of pesticides make no distinction between “good” and “bad” bugs, and they may even kill helpful insects that aid in the management of other pests.

It is for these reasons that frequent, “preventative” pesticide treatments to lawns for the management of white grubs are not suggested.

It is best not to treat lawns right before a significant rain is forecast.

Drop-type spreaders are less likely than rotary-type spreaders to disperse pesticide granules away from the target spot, according to the EPA (Figure 4).

Some pesticides can be dangerous to birds and other wildlife, so it’s important to be aware of this.

Apply pesticides only at the rates recommended on the label, avoid using them near streams and ponds, and irrigate applications as soon as possible to help decrease the danger to non-target organisms such as birds.

Toxic effects on fish and other aquatic species can result from such acts.

Make contact with the appropriate county office.

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