MSU is an affirmative-action, equal-opportunity employer. Check for the active ingredient in a grub product. White grubs are the larvae of scarab beetles. Wisconsin, Minnesota and Iowa have now joined the club of Midwest states with lots of Japanese beetles, and they have been found in isolated locations as far west as Colorado. There are different recommended timings for application depending on the active ingredient. “In many cases, grubs aren’t even discovered until the skunks and raccoons start digging them up,” said Shetlar. However, as European chafers and Japanese beetles have spread northward, lawns and other low maintenance turf areas in much of the Lower Peninsula north of Lansing and in the eastern half of the Upper Peninsula are seeing more damage. Chafer grub treatment Your Greensleeves local lawn care expert will use our own biological insect control treatment, known as nematodes, to kill the chafer grubs. This chemical consistently reduced grub numbers by about 65-80% and research has shown that applications made before June are more efficacious than June or July application. If it’s still firmly rooted, then you have another problem, such as brown patch or dog urine damage. The lifecycle of a chafer grub is illustrated right and explains that the most effective time to apply nematodes will be between mid-July to mid-October, when larvae are large enough to encounter the nematode, aren't a significant issue in turf, but before soil temperatures are lower than 12 O C and the grubs move lower down in the soil profile. These products are used to prevent future grub problems, not to control the grubs present in the lawn in the spring. How Do I Treat a Chafer Beetle Infestation? If you notice more than 6 grubs in this space, it’s a good time to consider preventive methods or treatments to reduce overpopulation. It’s when these “de-thatcher” populations grow out of control that the dreaded lawn damage takes place. This is most effective between July and October when the chafer grubs are most active. Check out the MSU Turfgrass Management - Golf Course Certificate Program! Do not treat your garden or lawn with chemicals that will kill natural enemies such as ants, ground beetles, scoliids, and tiphiids. Reducing your organic matter is certainly a way forward and there is evidence to say if you roll the surface heavily you will kill off chafer grubs. Masked chafer grubs feed on the roots of turfgrass. Preventive controls include the neonicotinoids and chlorantraniliprole, but the timing for each approach is very different.The label directions for most neonicotinoids (products containing chlothianidin, imidacloprid, or thiamethoxam) indicate they should be applied \"when females are laying eggs\". LawnStarter is a startup making lawn care easy affordable and reliable. Later, irregular brown patches appear in your turf. Always follow label directions carefully when using any chemical pesticide. “In that case, they work quite well,” he said. As seen in Forbes, CNBC and USA Today, LawnStarter lets makes it easy to schedule service with a local lawn care professional. There are a lot of cultural methods you can use, particularly to get leatherjackets up. The profusion of different products can be rather mystifying. European chafers are generally found in drier turf and their population levels will fluctuate depending upon how wet or dry the weather was the previous summer. When the ground warms up in spring, they resume feeding and can cause damage from the time the grass turns green until they pupate in mid-May. If you have a grub problem, these pesky insects can ruin a beautiful lawn by laying eggs and feeding on the roots of the grass, resulting in bare spots that will leave your lawn less than attractive. Carefully check the label for ingredients. Try a synthetic pesticide for all grubs. We don’t seem to be getting as many calls about lawns damaged by Japanese beetle grubs in the southern half of the Lower Peninsula, south of Lansing, but we are getting more calls from the northern Lower Peninsula as Japanese beetles continue to spread northward. Products containing only these ingredients will not work for grub control because the active ingredient binds with organic material and will not move down to where the grubs are feeding. By: Julie Slezak 21 September, 2017. However, Shetlar did let on that the most experienced organic lawn care professionals may have the knack for using them effectively against white grubs. Granted, it sounds like something out of a horror film but the fact is, it works. When your lawn is brown and patchy, grubs could be the cause. More research is needed on this, but it could cause problems for native bees or have long-term health effects on honey bees or bumble bees. As with the preventive products, lawns should be mowed immediately before applying carbaryl or trichlorfon to protect bees. ... Chemical control. An online search indicates there are other products that will be available at other stores. These lawn pests tend to curl up in a “C” shape at rest. Some of these products come in a granular formulation that is applied with a fertilizer spreader or some products are designed to be mixed with water and sprayed. That’s the Japanese beetle and the masked chafer,” said Shetlar about his home turf. Few admire their looks. These pests can be controlled, and your lawn can be restored back to its healthy state by getting rid of grub … There are two chemicals, carbaryl and trichlorfon, that are considered curative treatments. We must either tolerate them, battle them head-on, or strike a compromise with them — or, ideally, prevent their spread beforehand to reduce the risk of eventual over-infestation. These chemicals kill the grubs immediately. GrubEx with the active ingredient chlorantraniliprole is used for preventive soil... 2. If you wait until August when the brown patches appear, it’s too late. EMERGENCY AUTHORISATION for Acelepryn offers the potential to control economically damaging infestations of chafer grubs and leatherjackets, from accurate timing and treatment at egg laying - to target larvae at early 1st and 2nd stage instars. Regionally, European chafers are a much bigger problem than they used to be. Be sure the problem is grubs. During the late summer and early fall, you may begin to notice lawns turning an unattractive shade of brown in certain unsightly, dying patches. To kill existing grubs, you've got two chemical choices. European chafer grubs may be found in all locations in Michigan’s Lower Peninsula and in much of the Upper Peninsula. The blackheaded pasture cockchafer larvae tend to curl into a C-shape upon exposure or when handled, hence they are often referred to as 'curl' grubs. Once grubs are established, what can you do about it? Japanese beetle grubs also feed on turf roots in home lawns, but they are not usually as much of a problem on home lawns as European chafers can be. Do not use products containing ONLY lambda-cyhalothrin, gamma-cyhalothrin, bifenthrin, deltamethrin, cyfluthrin or permethrin for any phase of grub control. Their active ingredients are trichlorfon, clothianidin, and carbaryl. If you are applying a product containing clothianidin, thiamethoxam or imidacloprid, the lawn should be mowed prior to the application so that no weeds are flowering in the lawn when the insecticide is applied. For more information, visit https://extension.msu.edu. There are also products for sale that list grubs on the label that do NOT work for grubs. Powerful Insecitides 1. How to Apply Lime to Lawn to Kill Grubs. Chafer grubs can be found in the soil under the loose turf. The adults of white grubs are commonly Japanese Beetles, May/June beetles or a type of chafer.The larva (grub stage) are detritivores, but can damage lawn and garden areas by feeding on plant roots. If this has happened in your lawn, there is good news. There are many products available, some with the same active ingredients. The grubs feed from the beginning of August until late October. For a long time, the most common way to treat these grubs was a pesticide spray. If applied too late, preventative products may not be effective as they work best on small grubs. To contact an expert in your area, visit https://extension.msu.edu/experts, or call 888-MSUE4MI (888-678-3464). Like anything else in lawns and gardens, white grubs are a force of nature. If you have treated for several years and you do not see evidence of grubs in your lawn or in the neighbor’s lawn, it may be time to stop treating. Imidacloprid (trade name, Merit) is used for chemical control, but it has limited effectiveness. There is another active ingredient in some insecticides called chlorantraniliprole that will also work in preventing grub problems, but it is less water soluble than the other preventive compounds mentioned above, so it can be applied any time after the grass turns green in the spring. There is an erroneous philosophy being perpetuated that because we have European chafers and Japanese beetles in the area, it is necessary to treat every year or your lawn will be damaged by grubs. This article was published by Michigan State University Extension. Sevin Ready-to … However, they only work if used in the lawn in June and July. “White grubs are eating the accumulated thatch and organic matter that’s in the top inch of the soil profile. Do not use preventive compounds such as clothianidin, thiamethoxam or imidacloprid now. Water the lawn immediately after applying the insecticide. These two insecticides are the only options if high numbers of grubs are found in the fall and in spring before early May. But how do you know if you have a real lawn grub problem? Preventive products containing imidacloprid, thiamethoxam or clothianidin will consistently reduce 75-100% of the grubs if they are applied in June or July and if they are watered-in with 0.5 inches of irrigation immediately after application. Non-Toxic Lawn Grub Killers. While there are variations depending on which species of beetle they come from, the larvae tend to be stout, white-to-grayish with brown heads, about 3/4 of an inch to 2 inches in length. If the need should arise to use a curative compound, make sure to keep the infested lawn watered and fertilized and treat the area again with a preventive application the next summer or the problem will likely reoccur in the fall or the following spring. “It’s irrelevant which species it is,” advised Shetlar. What about those common organic recommendations for killing lawn grubs online, such as milky spore disease or beneficial nematodes? Bayer Advanced 700740S 24 Hour Grub Killer Plus, Granules & Bayer Grub Control, Spray. The two types of curative pesticides you can use are carbaryl and trichlorfon (sold under the brand name Dylox). You can measure how much irrigation is applied by putting out several coffee cups in your lawn and run the irrigation until they fill to a half-inch level above the bottom. The eggs of both species hatch about 10 days after they are laid. Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. Although grubs are a common pest of lawns, they sometimes end up in gardens adjoining patches of grass. Any use poses a risk of harm to not just people, but other insects, including lawn-beneficial pollinators. At one garden center a clerk showed us two products, one containing only permethrin and one containing only bifenthrin, when we asked for products to control grubs. Applying them now will allow some of the chemical to leach through the turf or break down to the point that not enough insecticide will be there in July to control grubs. Here’s a good test, from the University of California Integrated Pest Management Program: Pull up about 1 square foot of the earth around the base of your sod (where the stems meet the roots). However, adult European chafers do not eat at all and so are not the problem defoliators that Japanese beetles are. Neither of the products listed grubs on the label printed on the bag and neither of the products would have controlled grubs. Both compounds work equally well on Japanese beetle grubs. Show your Spartan pride and give the gift of delicious MSU Dairy Store cheese this holiday season! The likely explanation is the grass is being destroyed by hungry, thriving grub worms living below the surface of the lawn. Always wear rubber gloves and rubber boots when applying insecticides to turfgrass. The most common (and, sadly, most effective) ways to kill grubs are chemical insecticides. However, when applied in June or July they provide excellent protection against the next generation of grubs. The grubs of economic importance in North Carolina are those of the Japanese beetle, the green June beetle, the southern masked chafer, the northern masked chafer, and the Asiatic garden beetle. David Shetlar is a professor emeritus with a doctoral degree in entomology at The Ohio State University. The chemicals carbaryl and trichlorfon that are considered curative treatments — they are short-lived products effective immediately. ... are known for their ability to develop resistance to synthetic chemicals and some pesticides may be non-specific and kill beneficial insects. There is one insecticide product in a different chemical class that will give a similar level of grub control: chlorantraniliprole (Acelepryn). Nemasys G (controls chafer grubs) contain nematodes that provide the perfect biological control by entering the larvae, which stops them feeding within three days of infection. However, they only work if used in the lawn in June and July. So, if you need to apply the preventive insecticide BEFORE the grubs are there, how do you know if you need to use an insecticide or not? There was a product available in years past from Spectrum that contained imidacloprid, but I did not see any in my visits the last two years (2016 and 2017). Since grubs eat grass roots, the lawn will be easy to pull up in chunks. “Even then, milky spore disease is a weak pathogen that results in 20% to 25% infection at best.”. MSU is an affirmative-action, equal-opportunity employer, committed to achieving excellence through a diverse workforce and inclusive culture that encourages all people to reach their full potential. Japanese beetle grubs are widespread invasive insects, and their white grub larvae are bound to be found in lawns all over the country too, not just Ohio. When talking about the maximum threshold of tolerance for grubs, “I always chuckle about [checking the threshold], in that skunks and raccoons haven’t read about this threshold.”, As such, it may be worthwhile for homeowners to be just a little warier on account of skunks and raccoons. There are “two major white grub species that cause problems in Ohio. The critical issue with any grub control product is the active ingredient. Use Milky Spore. All turfgrass species, especially annual bluegrass (a common weed in turf), Kentucky bluegrass, and perennial ryegrass. Store insecticide products in a locked cabinet not accessible to children. I would first try nematodes - there is a specific type for chafer grubs and one for leather jackets. Michigan State University Extension programs and materials are open to all without regard to race, color, national origin, gender, gender identity, religion, age, height, weight, disability, political beliefs, sexual orientation, marital status, family status or veteran status. There are two chemicals, carbaryl and trichlorfon, that are considered curative treatments. I found five to nine different products at each store. They are not cheap but will treat the problem at source. It was also reported in Wisconsin in 2013. Some of it manifests as dry and deadened looking patches in your lawn. This also moves the chemical off the grass and will make the yard safe for children, pets and wildlife after the yard is dry. I went to several of the local lawn and garden centers in the Lansing, Michigan, area to see what kinds of products are available that specifically claim they will work to control grubs. The other is Sevin (carbaryl). These products work well for above-ground feeding insects that live on the grass leaves or soil surface, but not for insects that feed on the roots. The standard, and highly effective, grub control insecticides are products that contain imidacloprid, clothianidin or thiomethoxam. Dylox and Sevin are the products to choose from. Here’s how to choose and use the right one for your lawn. It is important to realize that healthy turf, supported by frequent rain or irrigation, can support a grub population of five or more grubs per square foot with no visible turf damage. Add one quart of warm water and one tablespoon of liquid soap. David Smitley, Terry Davis and Erica Hotchkiss, Michigan State University, Department of Entomology - By the end of October, they are fully grown. For a one-two punch that can deter adult beetles and grubs, mix two cloves of chopped garlic with one tablespoon of mineral oil, and allow that to sit in the freezer overnight. Although the bag often says apply anytime from May to Aug. 15, it is highly recommended that products containing imidacloprid, thiamethoxam, clothianidin be applied and irrigated into the soil in June or July. The most definitive way to check for an infestation is to pull the grass back and physically check for the beetles. The chafers (or Maybugs) produce the largest grubs, up to 5cm (2in) long. There is a widely sold trade name called Triazicide from Spectrum that lists grubs on the label and states it will control insects above or below ground and has a picture of a grub on the front of the bag. But it can get worse: Large urban and suburban critters, such as skunks and raccoons, are apt to claw up your entire lawn looking for them, considering them hard-to-come-by delicacies. Professor Daniel. If there is nothing flowering in the lawn, there is nothing in it that would attract bees. Safe for use on all types of grass and ornamentals. * Editorial Note: LawnStarter may receive a commission if you purchase certain products mentioned in this article. Adult beetles typically lay their eggs in June or July and, by August, those eggs hatch into larvae. Our research has indicated that carbaryl has been a little more effective on European chafer grubs than trichlorfon. Consider carefully whether it would be best to wait and apply a preventive later. These natural predators may help control the problem. They too like roots but restrict themselves to lawns. 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