Non-Toxic Lawn Grub Killers. 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. They are short-lived compounds that kill all life stages of grubs. Milky spore is a spreadable bacteria known as Bacillus popilliae that can be used … Other types of common lawn grubs around the United States include the larvae of the May and June beetles, green June beetle and the black turfgrass ataenius. 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.”. Any use poses a risk of harm to not just people, but other insects, including lawn-beneficial pollinators. Powerful Insecitides 1. Check the active ingredients. However, adult European chafers do not eat at all and so are not the problem defoliators that Japanese beetles are. By the end of October, they are fully grown. 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. The second major concern is to make sure the insecticide is thoroughly watered into the ground with at least a half-inch of irrigation or rain immediately after the chemical is applied. Grub damage may appear in home lawns from mid-September to November or from March to early May. However, for low-maintenance lawns, even if the turf is not killed from grub feeding, the thinned and weakened turf may be prone to weeds and drought stress. They can be abundant in non-irrigated home lawns if we receive frequent rain in July, but are scarce in lawns that are very dry in July and early August. 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. 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. Here’s how to choose and use the right one for your lawn. To get the best result, you have to apply this product in between July and August. 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. A lawn should be mowed at 3 to 4 inches in height and properly fertilized for maximum root growth. It was also reported in Wisconsin in 2013. 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. Follow this blog to stay tuned with what you need to keep your lawn in tip-top shape year-round. When your lawn is brown and patchy, grubs could be the cause. “They cause the same kind of damage.”. If there is nothing flowering in the lawn, there is nothing in it that would attract bees. “I emphasize a lot — especially to lawn care and sport field managers — [to try] to keep the thatch down to a minimum,” Shetlar said. Check for the active ingredient in a grub product. Bayer Advanced Season-Long Grub Control (or Bayer Advanced Merit) - Granular, Bayer Advanced Season-Long Grub Control and Turf Revitalizer - Granular, Premium Grub Control (Do not confuse with “Premium Insect Control”), Bayer Advanced Complete Insect Killer Liquid attach-to-hose-bottle, Bayer Advanced Complete Insect Killer Granules - Granular, Bayer Advanced 24 hr Grub Killer Plus - Granular, Spectracide Triazicide Insect Killer for Lawns - Granular. 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. Use them in June or July to control grubs that would be damaging turf in the fall. Here are our picks for the best grub killers. Regionally, European chafers are a much bigger problem than they used to be. 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. This product contains microscopic worms called Entomopathogenic Nematodes which prey on Chafer Grubs, infecting them with a fatal bacteria. Always follow label directions carefully when using any chemical pesticide. Mowing prior to making the application will avoid this problem by removing the flowers. Do not use products containing ONLY lambda-cyhalothrin, gamma-cyhalothrin, bifenthrin, deltamethrin, cyfluthrin or permethrin for any phase of grub control. The label lists the legal rate at which the product can be used. 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? How Do I Treat a Chafer Beetle Infestation? They are not cheap but will treat the problem at source. 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. European chafer grubs may be found in all locations in Michigan’s Lower Peninsula and in much of the Upper Peninsula. Chafer grubs can be found in the soil under the loose turf. Next, you can keep the area moist enough to keep the earthworms alive, but dry enough to repel grub worms. The outbreak phase where turf damage is common may last five to 10 years. Their active ingredients are trichlorfon, clothianidin, and carbaryl. For some, a lush green lawn is a crowning achievement. 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. 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. 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. The grubs feed from the beginning of August until late October. If this has happened in your lawn, there is good news. 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\". 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. They too like roots but restrict themselves to lawns. Use the right rate/amount of product. This also moves the chemical off the grass and will make the yard safe for children, pets and wildlife after the yard is dry. The active ingredients are usually shown on the bottom right or left of the front of the bag and listed as a percent of composition. But what are the most effective options for sustainable-minded lawn owners? David Smitley, Terry Davis and Erica Hotchkiss, Michigan State University, Department of Entomology - 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. 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. The chafers (or Maybugs) produce the largest grubs, up to 5cm (2in) long. The nematodes (small numbers of which are naturally present in soil) will kill the grubs without unbalancing the soil ecosystem like chemical … If applied in early spring, the pesticide may move through the soil or partially degrade by the time the grubs hatch in late July. Add one quart of warm water and one tablespoon of liquid soap. 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. There is little benefit to exceeding this rate, and doing so is also illegal. During the late summer and early fall, you may begin to notice lawns turning an unattractive shade of brown in certain unsightly, dying patches. These natural predators may help control the problem. Finding one or two grubs does not indicate you need to apply a grub control product. Free Shipping … Healthy turf with a few grubs may not need an insecticide. 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. 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. Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. Both compounds work equally well on Japanese beetle grubs. Unlike European chafer beetle grubs, rose chafer grubs do not harm turf grassroots. 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. To kill grubs in the spring or fall, use carbaryl or trichlorfon. The 4-H Name and Emblem have special protections from Congress, protected by code 18 USC 707. mowing your yard with the mower on the highest setting. Make sure to irrigate the lawn with at least. The grubs get their start when the adult beetles lay eggs in your turf, usually in spring. Chemical: Treat with insecticides labeled for use on grubs 45 days after adult beetles appear. They are preventive products that work very well on newly hatched grubs present in July, but do not work well for large grubs found from September to May. “But the problem is, [if] they’re eating that thatch, they do eat the roots and the crowns [of turfgrass], which kills the plant.”. Bayer Advanced 700740S 24 Hour Grub Killer Plus, Granules & Bayer Grub Control, Spray. Proper fertilization is important to prevent and allow the lawn to recover from grub damage. There are two chemicals, carbaryl and trichlorfon, that are considered curative treatments. The two types of curative pesticides you can use are carbaryl and trichlorfon (sold under the brand name Dylox). Mow lawns immediately before applying an insecticide for grubs to remove weed flowers and protect bees. In Canada, it is a problem in Ontario and Vancouver, so Washington State is on the lookout for it also. How to Control Grub Worms in the Garden. 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. Jeffrey W. Dwyer, Director, MSU Extension, East Lansing, MI 48824. Chlorantraniliprole can be applied as early as April and up to mid-July. These worms then reproduce inside the dead grubs and a new generation is released to prey on more Chafer Grubs. 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. Water the lawn immediately after applying the insecticide. Our research has indicated that carbaryl has been a little more effective on European chafer grubs than trichlorfon. 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. “The commercial milky spore disease is only for Japanese beetles,” Shetlar warned. To contact an expert in your area, visit https://extension.msu.edu/experts, or call 888-MSUE4MI (888-678-3464). If you notice more than 6 grubs in this space, it’s a good time to consider preventive methods or treatments to reduce overpopulation. 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. To kill existing grubs, you've got two chemical choices. “In that case, they work quite well,” he said. Japanese beetles like to lay their eggs on irrigated turf like golf courses, athletic fields and highly maintained lawns. These lawn pests tend to curl up in a “C” shape at rest. They live in beds and borders and feed on roots and vegetables. The preventive compound chlorantraniliprole should ideally be applied in April or May to control grubs that would be damaging turf in the fall as it will take longer for the material to move to where the grubs will be feeding in July. When full grown, white grubs are about 1 inch (2.5 cm) long, much bigger than ataenius or billbug grubs. Carefully check the label for ingredients. However, they only work if used in the lawn in June and July. Several other species, such as May beetles and June beetles, are also present but usually in low numbers. “White grubs are eating the accumulated thatch and organic matter that’s in the top inch of the soil profile. Do not apply any curative compounds in the spring after May 15 as grubs stop feeding in late May as they prepare to pupate. 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. Biological, granulated insecticide is a great non–chemical choice to control grubs found in lawns. Like anything else in lawns and gardens, white grubs are a force of nature. An online search indicates there are other products that will be available at other stores. European chafers can devastate a lawn with little warning because the adult beetles fly at dusk when they emerge in June and early July, and can easily be overlooked because their evening flight to mate and lay eggs occurs after sunset. This information is for educational purposes only. In fact, the damage from these animals alone may be the bigger issue to prevent. Below is a short list of products now being sold for grub control as of May 22, 2020, in stores checked in the Mid-Michigan area. Damage. 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. I found five to nine different products at each store. It’s when these “de-thatcher” populations grow out of control that the dreaded lawn damage takes place. Effective insecticide control products against grubs include imidacloprid, thiamethoxam and clothianidin. Lawn grubs can be present in your lawn but cause absolutely no problems. 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. If you find more than 5-10 grubs in a 30cm by 30cm section of grass, you likely have an infestation. These active ingredients can be toxic to bees if the bees visit flowers that were recently sprayed. Bayer offers two products... 3. There is one insecticide product in a different chemical class that will give a similar level of grub control: chlorantraniliprole (Acelepryn). May 22, 2020. Our research indicates they will kill 20-80% of grubs when applied in September or 20-55% when applied in late October. Be sure the problem is grubs. In addition, grub control products that contain the active ingredient chlorantraniliprole are safe for bees, even when weed flowers are sprayed. Weeds that flower again after mowing are much safer than weed flowers that were sprayed directly with insecticide, but some of the insecticide is absorbed by the roots and will move into the pollen and nectar. They will not work on grubs found in the lawn from the middle of October through the middle of May. But how do you know if you have a real lawn grub problem? Check out the MSU Turfgrass Management - Golf Course Certificate Program! Get easy-to-understand, actionable yard tips that will give you the greenest grass on the block. Effective insecticide control products against grubs include imidacloprid, thiamethoxam and clothianidin. Lawn sprinklers can be used if you do not have an irrigation system. The chemicals carbaryl and trichlorfon that are considered curative treatments — they are short-lived products effective immediately. Home lawns, golf courses, and turf growers have the potential to be most significantly impacted if the European chafer beetle were to become established in … Chemical Control. Preventive products are the most effective. 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. Few admire their looks. However, when applied in June or July they provide excellent protection against the next generation of grubs. This is most effective between July and October when the chafer grubs are most active. Safe for use on all types of grass and ornamentals. 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. For a long time, the most common way to treat these grubs was a pesticide spray. In 2002, they were only found in New York, Pennsylvania, Massachusetts, Delaware, New Jersey, Connecticut, New Hampshire, Vermont, Maryland, Southern Michigan, and eastern Ohio. Always wear rubber gloves and rubber boots when applying insecticides to turfgrass. 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). 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. There are a lot of cultural methods you can use, particularly to get leatherjackets up. 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. Products containing imidacloprid, thiamethoxam, clothianidin or chlorantraniloprole will not control grubs in the spring. Shetlar, however, recommended that lawn lovers should be even more vigilant, especially in order to prevent large critters from eating them. Japanese beetles and European chafers lay most of their eggs in July, but Japanese beetles continue laying eggs into August. In the last 10 years, the amount of European chafer damage to home lawns in southern Michigan has steadily decreased to the point where it is unusual now to find populations high enough to damage turf. In fact, most well-maintained lawns do not have visible damage from grubs. There are many products available, some with the same active ingredients. Putting tarpaulin down on a surface sweats them out and they come to the surface and you sweep them off. Is there anything more damaging (or, in some peoples’ eyes, revolting) than grubs in your lawn? Finally, avoid spray drift or granular spreader drift to flower beds when applying thiamethoxam, imidacloprid, clothianidin or any insecticide for grubs other than chlorantraniliprole. This material is based upon work supported by the USDA and the National Institute of Food and Agriculture award number(s) 2014-70006-22498. David Shetlar is a professor emeritus with a doctoral degree in entomology at The Ohio State University. Also, in the last two years several products have become available in an attach-to-hose bottle and are automatically mixed with water when applied. They are short-lived compounds that kill all life stages of grubs. As seen in Forbes, CNBC and USA Today, LawnStarter lets makes it easy to schedule service with a local lawn care professional. These pests can be controlled, and your lawn can be restored back to its healthy state by getting rid of grub … Professor Daniel. This is not true. ... Chemical control. Not all the grub control products on store shelves will be effective this spring. Since grubs eat grass roots, the lawn will be easy to pull up in chunks. They grow all summer and then, go deep into the soil for resting for winter. “You can typically get 60% to 100% control with the nematodes when they’re used at the right time in the right way.”. The critical issue with any grub control product is the active ingredient. Do not use preventive compounds such as clothianidin, thiamethoxam or imidacloprid now. 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. Show your Spartan pride and give the gift of delicious MSU Dairy Store cheese this holiday season! He’s also co-author of the comprehensive guide “Garden Insects of North America,” plus other pest management tomes including “Managing Turfgrass Pests.”. “It’s irrelevant which species it is,” advised Shetlar. 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. 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. “The typical damage usually seen here is something that looks like drought stress usually,” Shetlar said. 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