There are a lot of cultural methods you can use, particularly to get leatherjackets up. “You can typically get 60% to 100% control with the nematodes when they’re used at the right time in the right way.”. Although grubs are a common pest of lawns, they sometimes end up in gardens adjoining patches of grass. Not all the grub control products on store shelves will be effective this spring. Hosts. Shetlar added, “If there are four to five grubs per square foot, that’s usually enough for them to be digging around.”. Before doing anything, it is important to make sure the problem is grubs. There are two chemicals, carbaryl and trichlorfon, that are considered curative treatments. In 2002, they were only found in New York, Pennsylvania, Massachusetts, Delaware, New Jersey, Connecticut, New Hampshire, Vermont, Maryland, Southern Michigan, and eastern Ohio. Dylox and Sevin are the products to choose from. Some of it manifests as dry and deadened looking patches in your lawn. It’s when these “de-thatcher” populations grow out of control that the dreaded lawn damage takes place. For some, a lush green lawn is a crowning achievement. Chemical Control. Currently, there are no approved insecticides for the control of chafer grubs; although, in 2018 and 2019 emergency authorisation of Syngenta insecticide Acelepryn was approved for the control of chafer grubs and leatherjackets. Proper fertilization is important to prevent and allow the lawn to recover from grub damage. Other chafer species besides the masked chafer beetles (like the European chafer) also lead to white grub infestations and can establish in lawns beyond the state’s borders. MSU is an affirmative-action, equal-opportunity employer. By: Julie Slezak 21 September, 2017. Current research also shows that watering with 0.5 inches of irrigation immediately after the application is essential to get effective results from these insecticides. In fact, most well-maintained lawns do not have visible damage from grubs. “White grubs are eating the accumulated thatch and organic matter that’s in the top inch of the soil profile. 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. 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. Professor Daniel. Several other species, such as May beetles and June beetles, are also present but usually in low numbers. 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. There are many products available, some with the same active ingredients. Non-Toxic Lawn Grub Killers. 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\". Make sure to irrigate the lawn with at least. Mow lawns immediately before applying an insecticide for grubs to remove weed flowers and protect bees. Free Shipping … However, Shetlar did let on that the most experienced organic lawn care professionals may have the knack for using them effectively against white grubs. what chemicals kill chafer grubs Not all the grub control products on store shelves will be effective this spring. The eggs of both species hatch about 10 days after they are laid. Garden chafer and Welsh chafer grubs are often smaller - upwards of 2cm (¾in) long. Always wear rubber gloves and rubber boots when applying insecticides to turfgrass. The two types of curative pesticides you can use are carbaryl and trichlorfon (sold under the brand name Dylox). Chemical: Treat with insecticides labeled for use on grubs 45 days after adult beetles appear. To contact an expert in your area, visit https://extension.msu.edu/experts, or call 888-MSUE4MI (888-678-3464). 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. If you select a product that contains imidacloprid ingredient to kill larvae will be the best choice. 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. These two insecticides are the only options if high numbers of grubs are found in the fall and in spring before early May. Beneficial Insects for Your Lawn and Garden, Go, Spot, Go: 5 Myths About Dog Urine Spots on Lawns, How to Spray Lawns for Weeds, Safely and Effectively, Composting 101: How to Start Your First Compost Pile, Companion Plants That Love Your Lawn (and Vice Versa), Natural Weed Killers: A Guide to Organic Herbicides, 2021’s Best and Worst States for Living Off the Grid, 10 Walkway Ideas for Your Yard and Garden, 14 Treehouse Ideas for Your Backyard Playhouse. To kill grubs in the spring or fall, use carbaryl or trichlorfon. There are different recommended timings for application depending on the active ingredient. Follow this blog to stay tuned with what you need to keep your lawn in tip-top shape year-round. If applied too late, preventative products may not be effective as they work best on small grubs. Both compounds work equally well on Japanese beetle grubs. How Do I Treat a Chafer Beetle Infestation? He also mentions research from a University of Kentucky entomologist suggesting you should choose one species of turfgrass over another. “In that case, they work quite well,” he said. One is Dylox (trichlorfon), which is a quick-acting chemical insecticide that kills both kinds of grubs. These two insecticides are the only options if high numbers of grubs are found in the fall and in spring before early May. Milky spore is a spreadable bacteria known as Bacillus popilliae that can be used … A. Potter “has conclusively shown that the tall [fescue grasses] are much more tolerant of grub populations,” said Shetlar, who then added, “Where Kentucky bluegrass and perennial ryegrass will be damaged with … eight to 10 grubs per square foot, the tall fescues usually require somewhere around 12 to 14 grubs per square foot” before showing damage. There are two chemicals, carbaryl and trichlorfon, that are considered curative treatments. LawnStarter is a startup making lawn care easy affordable and reliable. His key to this: fertilizing one’s lawn with nitrogen only once per year, and doing it very strategically “and judiciously,” to quote Shetlar, “usually in late October, early November.”. They are not cheap but will treat the problem at source. The nematodes (small numbers of which are naturally present in soil) will kill the grubs without unbalancing the soil ecosystem like chemical … Cultural: Spike-aeration of turf may kill significant portions of white grub populations when they are feeding close to the soil surface (approximately 45 days after beetles appear). Check the bag or bottle to determine what active ingredient the product contains. Bayer Advanced 700740S 24 Hour Grub Killer Plus, Granules & Bayer Grub Control, Spray. These worms then reproduce inside the dead grubs and a new generation is released to prey on more Chafer Grubs. “I emphasize a lot — especially to lawn care and sport field managers — [to try] to keep the thatch down to a minimum,” Shetlar said. Granted, it sounds like something out of a horror film but the fact is, it works. These lawn pests tend to curl up in a “C” shape at rest. 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. As seen in Forbes, CNBC and USA Today, LawnStarter lets makes it easy to schedule service with a local lawn care professional. How to Apply Lime to Lawn to Kill Grubs. They live in beds and borders and feed on roots and vegetables. 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. They are short-lived compounds that kill all life stages of grubs. If applied in early spring, the pesticide may move through the soil or partially degrade by the time the grubs hatch in late July. GrubEx with the active ingredient chlorantraniliprole is used for preventive soil... 2. Add one quart of warm water and one tablespoon of liquid soap. These products are used to prevent future grub problems, not to control the grubs present in the lawn in the spring. 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. Check out the MSU Turfgrass Management - Golf Course Certificate Program! Always follow label directions carefully when using any chemical pesticide. Lawn sprinklers can be used if you do not have an irrigation system. The most common (and, sadly, most effective) ways to kill grubs are chemical insecticides. To have a digest of information delivered straight to your email inbox, visit https://extension.msu.edu/newsletters. Grub damage may appear in home lawns from mid-September to November or from March to early May. As for beneficial nematodes, Shetlar said, “There’s a very steep learning curve to using the insect parasitic nematodes.” They can only be effective when used curatively, and even then, only on small affected areas. The larvae of both species look almost identical. Mowing prior to making the application will avoid this problem by removing the flowers. He’s also co-author of the comprehensive guide “Garden Insects of North America,” plus other pest management tomes including “Managing Turfgrass Pests.”. These are most likely the larvae of European chafers if they are found in lawns without an irrigation system. 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. 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. 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. But what are the most effective options for sustainable-minded lawn owners? 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. ... Chemical control. This is not true. However, they only work if used in the lawn in June and July. Later, irregular brown patches appear in your turf. However, adult European chafers do not eat at all and so are not the problem defoliators that Japanese beetles are. Here’s how to choose and use the right one for your lawn. One way to mitigate the damage: Mow your lawn just before applying so there are no weed flower heads to attract the pollinators to your temporarily poisoned yard. Since grubs eat grass roots, the lawn will be easy to pull up in chunks. For a long time, the most common way to treat these grubs was a pesticide spray. The likely explanation is the grass is being destroyed by hungry, thriving grub worms living below the surface of the lawn. Scotts GrubEx1 – Grub Killer. 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. It contains only lambda-cyhalothrin or gamma-cyhalothrin. The standard, and highly effective, grub control insecticides are products that contain imidacloprid, clothianidin or thiomethoxam. Here are our picks for the best grub killers. 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). If it’s still firmly rooted, then you have another problem, such as brown patch or dog urine damage. “They’re sort of nature’s ‘de-thatchers,’” he added. However, they only work if used in the lawn in June and July. Insecticides used for grubs can be separated into two groups based on how they work: preventive chemicals and curative chemicals. To kill existing grubs, you've got two chemical choices. These pests can be controlled, and your lawn can be restored back to its healthy state by getting rid of grub … Do not use preventive compounds such as clothianidin, thiamethoxam or imidacloprid now. Masked chafer grubs feed on the roots of turfgrass. White grubs are the larvae of scarab beetles. It is suspected that the spread of AGB is due to imidacloprid overuse: the chemical kills the other grub species and allows the expansion of this one. When you’ve gone through and determined for certain that you have grubs and need to treat, you can use a curative pesticide that will kill grubs almost immediately. May 22, 2020. 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 beetles like to lay their eggs on irrigated turf like golf courses, athletic fields and highly maintained lawns. The other is Sevin (carbaryl). Part of this difference may occur because the European chafer spends a longer portion of the summer feeding on turf. “But the problem is, [if] they’re eating that thatch, they do eat the roots and the crowns [of turfgrass], which kills the plant.”. Do not use products containing ONLY lambda-cyhalothrin, gamma-cyhalothrin, bifenthrin, deltamethrin, cyfluthrin or permethrin for grub control. There are “two major white grub species that cause problems in Ohio. Triazicide will not control grubs. The most definitive way to check for an infestation is to pull the grass back and physically check for the beetles. Use them in June or July to control grubs that would be damaging turf in the fall. The grubs feed from the beginning of August until late October. This is the result of grub activity: specifically, the consequences of their nibbling on your tender, tasty turfgrass roots. Now it has spread throughout Ohio, Michigan (all of the Lower and half of the Upper Peninsula), northern Indiana and into eastern Illinois. “In many cases, grubs aren’t even discovered until the skunks and raccoons start digging them up,” said Shetlar. 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. Get easy-to-understand, actionable yard tips that will give you the greenest grass on the block. 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. If you confirmed grub damage the previous fall or spring, meaning you found lots of grubs, then you may want to use a preventive insecticide for one or two years to build a more dense turf that will be tolerant of grubs. 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. These chemicals kill the grubs immediately. This material is based upon work supported by the USDA and the National Institute of Food and Agriculture award number(s) 2014-70006-22498. Reference to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned. Be sure the problem is grubs. “The commercial milky spore disease is only for Japanese beetles,” Shetlar warned. 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). Japanese beetles and European chafers lay most of their eggs in July, but Japanese beetles continue laying eggs into August. Mix well and spray it on the affected area immediately. Finally, avoid spray drift or granular spreader drift to flower beds when applying thiamethoxam, imidacloprid, clothianidin or any insecticide for grubs other than chlorantraniliprole. Safe for use on all types of grass and ornamentals. 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. 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? If you see a dead patch, use a shovel to dig up a few Frisbee-size samples of turf around the bare spot to a depth of 2 inches and look for 0.75-inch long, C-shaped white grubs. 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