Grub Sprays vs. Granules. 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. Healthy turf with a few grubs may not need an insecticide. Annual bluegrass weevils (larvae and adult), armyworms, chinch bugs, cutworms, sod webworms, white grubs. Our results so far agree with the results of a test conducted a number of years ago in Kentucky by C.T. After irrigation or rainfall, grub control is established in as little as 24 hours and penetrates thatch up to ½ inch thick. 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. Do not apply any curative compounds in the spring after May 15 as grubs stop feeding in late May as they prepare to pupate. If there is nothing flowering in the lawn, there is nothing in it that would attract bees. Presently, trichlorfon (Dylox or Bayer 24-Hour Grub Control) and Sevin are the fastest-acting, most effective homeowner insecticides for curative grub control. Check the bag or bottle to determine what active ingredient the product contains. vs. These products are used to prevent future grub problems, not to control the grubs present in the lawn in the spring. 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. Check out the MSU Sports & Commercial Turf Management Certificate Program! However, Japanese beetles could become common in Petoskey over the next 10 years. Also, irrigate your lawn immediately before and after applying the nematodes so as many as possible will make it into the soil. It is … There are many products available, some with the same active ingredients. It contains only lambda-cyhalothrin or gamma-cyhalothrin. The outbreak phase where turf damage is common may last five to 10 years. Lawns with a large, dense root system are much less likely to be damaged by grubs, and it is much more difficult for skunks and raccoons to dig and turn-over turf with a healthy root system. Regionally, European chafers are a much bigger problem than they used to be. Neither of the products listed grubs on the label printed on the bag and neither of the products would have controlled grubs. There is one insecticide product in a different chemical class that will give a similar level of grub control: chlorantraniliprole (Acelepryn). Japanese beetles and European chafers lay most of their eggs in July, but Japanese beetles continue laying eggs into August. Dylox 420 SL Insecticide treats surface feeding insects on lawns, landscape and recreational turf, such as golf courses. Potter. These active ingredients can be toxic to bees if the bees visit flowers that were recently sprayed. This information is for educational purposes only. This information is for educational purposes only. J. Econ. It kills 25% more grub types vs. original GrubEx. 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. Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. Mow lawns immediately before applying an insecticide for grubs to remove weed flowers and protect bees. MSU is an affirmative-action, equal-opportunity employer. To contact an expert in your area, visit, or call 888-MSUE4MI (888-678-3464). For more detailed information, on this go to the Michigan State University Turf website and see the grub control bulletin posted there. 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. I thought others may have the same question. 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. The product’s effects lasts for up to four months. 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. When watered properly, this product can even penetrate … Both compounds work equally well on Japanese beetle grubs. I … Not all the grub control products on store shelves will be effective this spring. 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. Two different types of chemicals are used at different times of the year for different targets, preventives and curatives. 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. 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. This is a highly effective systemic insecticide that kills the target pests by both contact and ingestion. I will put grubex down next spring as a preventer, I just needed something to kill the grubs now. Our research has indicated that carbaryl has been a little more effective on European chafer grubs than trichlorfon. As with the preventive products, lawns should be mowed immediately before applying carbaryl or trichlorfon to protect bees. 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. There is little benefit to exceeding this rate, and doing so is also illegal. 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.

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