Some people may want to consider a one-time treatment with a nematode that infects grubs: Heterorhabditis bacteriophora. This article was published by Michigan State University Extension. Research tests over the last 25 years have clearly shown that watering immediately after application helps to obtain good results. This information is for educational purposes only. Jeffrey W. Dwyer, Director, MSU Extension, East Lansing, MI 48824. They are short-lived compounds that kill all life stages of grubs. beetleGONE! 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. For more detailed information, on this go to the Michigan State University Turf website and see the grub control bulletin posted there. It was also reported in Wisconsin in 2013. To activate Dylox you must immediately water the product into the soil with at least 1/2 to 1 inch of water. Use the right rate/amount of product. DYLOX 420 SL Turf and Ornamental Insecticide is a soluble concentrate, which dissolves readily in water and is suitable for use in all power-operated ground sprayers. A lawn should be mowed at 3 to 4 inches in height and properly fertilized for maximum root growth. Insecticides used for grubs can be separated into two groups based on how they work: preventive chemicals and curative chemicals. The label lists the legal rate at which the product can be used. Carefully check the label for ingredients. The milky spore pathogen may not be as virulent to Japanese grubs now as it was in the 1940s during the. For more information, visit https://extension.msu.edu. This is a highly effective systemic insecticide that kills the target pests by both contact and ingestion. In addition, grub control products that contain the active ingredient chlorantraniliprole are safe for bees, even when weed flowers are sprayed. Before discussing alternative management strategies for grubs, it is important to understand that if grubs and turf damage are discovered in April, the only insecticides that will be effective in April are carbaryl (Sevin) and trichlorfon (Dylox). A garden center owner asks about alternatives to standard grub control insecticides. The standard, and highly effective, grub control insecticides are products that contain imidacloprid, clothianidin or thiomethoxam. It will take 10-14 days for the grubs to begin dying after the insecticide is applied. 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. Reference to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned. J. Econ. Dylox … The two most common are carbaryl, which is Sevin and trichlorfon, which is Dylox. To kill grubs in the spring or fall, use carbaryl or trichlorfon. April 1, 2014. Grub damage may appear in home lawns from mid-September to November or from March to early May. 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. 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. Consider carefully whether it would be best to wait and apply a preventive later. I … Healthy turf with a few grubs may not need an insecticide. Easily apply with a Scotts broadcast, drop, handheld, or Wizz … This is not true. Here’s a review of products and best practices. Neither of the products listed grubs on the label printed on the bag and neither of the products would have controlled grubs. 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. The first two are Heterorhabditis nematode products and the third a business that sells Heterorhabditis nematodes. In fact, most well-maintained lawns do not have visible damage from grubs. If there is nothing flowering in the lawn, there is nothing in it that would attract bees. It is best to apply the nematodes when grubs are present and when the soil temperature is above 50 degrees Fahrenheit. 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 outbreak phase where turf damage is common may last five to 10 years. There is one insecticide product in a different chemical class that will give a similar level of grub control: chlorantraniliprole (Acelepryn). There is little benefit to exceeding this rate, and doing so is also illegal. Chemical Action and Usages: Dylox is an organophosphate insecticide in a granular form for use on lawns to control mole crickets, sod webworms, cutworms, grubs and other listed insects in turf. If you order or purchase a live nematode product for grubs, make sure you buy a Heterorhabditis nematode and not a Steinernema or another type of nematode. There are many products available, some with the same active ingredients. Mow lawns immediately before applying an insecticide for grubs to remove weed flowers and protect bees. If applied in early spring, the pesticide may move through the soil or partially degrade by the time the grubs hatch in late July. Check out the MSU Turfgrass Management - Golf Course Certificate Program! 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. It contains only lambda-cyhalothrin or gamma-cyhalothrin. 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. I found five to nine different products at each store. A half-inch of irrigation is when lawn sprinklers are run until a container like a coffee mug, or several mugs, fills to a level 0.5 inches up from the bottom of the cup. 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. If applied too late, preventative products may not be effective as they work best on small grubs. Triazicide will not control grubs. Also, irrigate your lawn immediately before and after applying the nematodes so as many as possible will make it into the soil. Our results so far agree with the results of a test conducted a number of years ago in Kentucky by C.T. There are no scientific studies conducted at any university that I know of where the Milky Spore product that is now available provided adequate grub control. 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. Check out the MSU Sports & Commercial Turf Management Certificate Program! 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. Dylox is one of the more potent and toxic insecticides, and it's not labeled for use on edibles. It is … As a professional lawn care service we get a lot of questions about lawn maintenance. It kills about 50 … However, when applied in June or July they provide excellent protection against the next generation of grubs. If customers ask about the safety of standard neonicotinoid grub control products (imidacloprid, clothianidin and thiomethoxam) for honey bees and pollinators, you can tell them that if the lawn is mowed before the insecticide is applied that it will be safe for honey bees because no open flowers (flowering weeds) will be present when the lawn is treated. 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. ... GrubEx or Dylox… 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 received this email question about alternative grub control insecticides. Redmond, C.T. 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. 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. 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. One is the chemical approach. Unfortunately, the Milky Spore product you asked about did not provide any grub control in the first year of a test we are conducting at Old Channel Trail Golf Course near Ludington, Mich. We plan to continue this test for two more years. 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. Before doing anything, it is important to make sure the problem is grubs. These two insecticides are the only options if high numbers of grubs are found in the fall and in spring before early May. Prevent grubs from damaging your lawn with Scotts GrubEx1 Season Long Grub Killer. Check for the active ingredient in a grub product. Potter. By the end of October, they are fully grown. Reference to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned. 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. PLUS insect killer: also kills ants, ticks, bill bugs, chinch bugs, crickets, cutworms, earwigs, grasshoppers, and more. Do not apply any curative compounds in the spring after May 15 as grubs stop feeding in late May as they prepare to pupate. To have a digest of information delivered straight to your email inbox, visit https://extension.msu.edu/newsletters. By the time I did further research and bought the BioAdvanced Grub Killer (due to having Protecting bees and other pollinators. Use them in June or July to control grubs that would be damaging turf in the fall. The product’s effects lasts for up to four months. However, that is ancient history now, and there are three reasons why the Milky Spore product which can be purchased at garden centers may not be appropriate for a home lawn treatment: Although Japanese beetles have been found near you in Petoskey, it is more likely that people in your area will have June beetle grubs or European chafer grubs. 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. Look on the Internet for ‘Heteromask,’ ‘Nemasys G’ or Buglogical Control Systems. Dave Smitley, Michigan State University Extension, Department of Entomology - *What is 0.5 inches of irrigation? Apply chlorantraniliprole early (in April or May) for summer and fall grub control. Entomol. You can do this by putting a pinch of nematodes in a glass of water at room temperature for 10 minutes and check to see if they are wiggling. They are not as effective as the preventive compounds in reducing grub numbers. An online search indicates there are other products that will be available at other stores. In 2002, they were only found in New York, Pennsylvania, Massachusetts, Delaware, New Jersey, Connecticut, New Hampshire, Vermont, Maryland, Southern Michigan, and eastern Ohio. These all look similar and feed on the tender roots of turf. In Canada, it is a problem in Ontario and Vancouver, so Washington State is on the lookout for it also. Ingredients such as carbaryl, trichlorfon or zeta-cypermethrin are curative and work on contact with grubs. 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. Mowing prior to making the application will avoid this problem by removing the flowers. Make sure to irrigate the lawn with at least. This material is based upon work supported by the USDA and the National Institute of Food and Agriculture award number(s) 2014-70006-22498. 88: 846-854. Not all the grub control products on store shelves will be effective this spring. To contact an expert in your area, visit https://extension.msu.edu/experts, or call 888-MSUE4MI (888-678-3464). Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. Annual bluegrass weevils (larvae and adult), armyworms, chinch bugs, cutworms, sod webworms, white grubs. 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? They will not work on grubs found in the lawn from the middle of October through the middle of May. Prevents lawn damage: use … These are most likely the larvae of European chafers if they are found in lawns without an irrigation system. … Be sure the problem is grubs. Both come in a ready to use granular formular that can be put out with a hand or push … To have a digest of information delivered straight to your email inbox, visit https://extension.msu.edu/newsletters. These active ingredients can be toxic to bees if the bees visit flowers that were recently sprayed. Unfortunately, there are not any biological control products that you can purchase at the garden center that will give the same level of control as the standard insecticide products. David Smitley, Terry Davis and Erica Hotchkiss, Michigan State University, Department of Entomology - Use specified dosage of DYLOX 420 SL … Here’s how to choose and use the right one for your lawn. They spend the winter as large grubs (0.75 inches long) some 2-6 inches below the soil surface. 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. Jeffrey W. Dwyer, Director, MSU Extension, East Lansing, MI 48824. The main ingredient is dylox … Redmond and D.A. There are two chemicals, carbaryl and trichlorfon, that are considered curative treatments. It kills 25% more grub types vs. original GrubEx. There are several products on the market that contain a combination of one of the preventive compounds and one of the above listed insecticides that “do not work on grubs.” The preventive ingredient will make it an effective choice for grub control. You can do this by following Michigan State University Extension’s recommendations of setting your lawn mower at the highest clipping height (3-4 inches); applying at least 2.5 pounds of actual N per 1,000 square feet of lawn per year using a slow-release fertilizer several times each year; watering during dry periods; and returning grass clippings and chopped leaves to the lawn instead of collecting and removing them. Examples of products that contain these chemicals include Sevin® and Dylox®. To contact an expert in your area, visit https://extension.msu.edu/experts, or call 888-MSUE4MI (888-678-3464). Homeowners who have just planted some new grass to fill in spots in an existing lawn that have been damaged by grubs may wonder how long they must wait till they can safely put down a grub killer, such as GrubEx… Water the lawn immediately after applying the insecticide. 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. If rub worms are already coming for the lush lawn, using a grub worm preventer like Scotts GrubEx Killer and Preventer will keep them at bay. Preventive products are the most effective. This information is for educational purposes only. I will put grubex down next spring as a preventer, I just needed something to kill the grubs now. The Bayer 24 Hour Grub Killer contains DYLOX… Use Dylox 6.2 Granular Insecticide … 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. Dylox (Active ingredient: Trichlorfon) Widely used by professionals, Dylox kills grubs after they are in their third instar. Granular vs Liquid Grub Killer; Grub killer vs grub preventer; ... GrubEx is made using the active ingredient called chlorantraniliprole. Alternatives: Synthetic Chemical Inhibitors - Preventative Curative Control •Organophosphates - Dylox® (Bayer has voluntarily canceled its production of most products containing the chemical), Diazinon® (off residential market) and ... (Acelepryn® & GrubEx … How Late Can I Put Down Grub Control? The critical issue with any grub control product is the active ingredient. 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. Our customers are looking for alternatives to the chemical options (especially with the publicity concerning honeybees) and I am hoping to help them find some. Before doing anything, it is important to make sure the problem is grubs. 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. Before discussing alternative management strategies for grubs, it is important to understand that if grubs and turf damage are discovered in April, the only insecticides that will be effective in April are carbaryl (Sevin) and trichlorfon (Dylox). Scotts GrubEx vs Bayer Grub Killer Plus. Have there been any studies done on its effectiveness? Be sure the problem is grubs. 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. Finding one or two grubs does not indicate you need to apply a grub control product. GrubEx with the active ingredient chlorantraniliprole is used for preventive soil treatment. By the time damage is … 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. Lack of efficacy of in-vivo and putatively in-vitro produced Paenibacillus popilliae against field populations of Japanese beetle (Coleoptera: Scarabaeidae) grubs in Kentucky. As with the preventive products, lawns should be mowed immediately before applying carbaryl or trichlorfon to protect bees. Both Bayer Advanced Grub Control and Bayer Advanced Grub Killer Plus are marketed to those battling with turf-destroying white grubs. Active … 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. Check out the MSU Turfgrass Management - Golf Course Certificate Program! 1995. Two different types of chemicals are used at different times of the year for different targets, preventives and curatives. Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. This time of year (late summer and fall), only curative products can be used to effectively control grub populations. 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). Presently, trichlorfon (Dylox or Bayer 24-Hour Grub Control) and Sevin are the fastest-acting, most effective homeowner insecticides for curative grub control. Always wear rubber gloves and rubber boots when applying insecticides to turfgrass. 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. Do not use products containing ONLY lambda-cyhalothrin, gamma-cyhalothrin, bifenthrin, deltamethrin, cyfluthrin or permethrin for any phase of grub control. Is the grub population here in northern Michigan likely to be other than from the Japanese beetle? Kills on contact: active ingredient Dylox kills grubs on contact. European chafer grubs may be found in all locations in Michigan’s Lower Peninsula and in much of the Upper Peninsula. Finally, avoid spray drift or granular spreader drift to flower beds when applying thiamethoxam, imidacloprid, clothianidin or any insecticide for grubs other than chlorantraniliprole. For quick kill now, Dylox (trichlorfon) is considered most effective with Sevin (carbaryl) as second. Chlorantraniliprole applied in April will not work on spring grubs that are already present when it is applied. 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. Which is Sevin and trichlorfon, which is Dylox … Dylox 6.2 insecticide! 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