Chlorantraniliprole can be applied as early as April and up to mid-July. In 2002, they were only found in New York, Pennsylvania, Massachusetts, Delaware, New Jersey, Connecticut, New Hampshire, Vermont, Maryland, Southern Michigan, and eastern Ohio. In the appropriate section of the Spreader Settings table on the appropriate label, … This article was published by Michigan State University Extension. There are different recommended timings for application depending on the active ingredient. • Water grass as soon as possible after application to move product to root zone where insects feed. The critical issue with any grub control product is the active ingredient. Reference to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned. To kill grubs in the spring or fall, use carbaryl or trichlorfon. Proper fertilization is important to prevent and allow the lawn to recover from grub damage. 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. Crabgrass Lawn is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Take care of your grub problem with these methods and our grub worm killer to prevent damage in the spring. 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. Setting your spreader to the appropriate setting. Jeffrey W. Dwyer, Director, MSU Extension, East Lansing, MI 48824. 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. They will not work on grubs found in the lawn from the middle of October through the middle of May. Richly green and lush. 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. 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? Bayer Advanced 24 hr Grub Killer Plus - Granular trichlorfon 9.3% Apply in spring or fall to active grubs. Mowing prior to making the application will avoid this problem by removing the flowers. When timing is done right, you’ll be able to control about 80 percent of the grubworm infestation in the next season. 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. When treating your lawn to prevent grub damage for the next season, it would be too early to apply grub preventer on your turf in early spring. Grub Killer Plus USE RESTRICTIONS • •Do not apply near ˜sh pools, ponds, streams or lakes. Research tests over the last 25 years have clearly shown that watering immediately after application helps to obtain good results. They are not as effective as the preventive compounds in reducing grub numbers. 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). Consider carefully whether it would be best to wait and apply a preventive later. Monitor your lawn for grub worm activity after treating it. They spend the winter as large grubs (0.75 inches long) some 2-6 inches below the soil surface. In most cases though, you’ll only need to apply grub control twice in a season – the first one being a grub killer when you see signs of infestation and the second one being a grub preventer around June and July to stop their cycle. You cannot apply a grub preventer to kill grubs that are already damaging your lawn. There are two chemicals, carbaryl and trichlorfon, that are considered curative treatments. You only need to start a grub control treatment when you see signs of damage. The pesticide will easily disintegrate into the soil and lose its potency by the time the grubs hatch in July through August. A good preventer will contain any one of these active ingredients: The reason why you want to look for these ingredients is that they are very good at killing grubs at a tender age, usually as soon as they hatch. Please leave your comments below as I try to respond to everyone that has questions. We do not specifically market to children under 13. Neither of the products listed grubs on the label printed on the bag and neither of the products would have controlled grubs. 4 Ways to Bring it Back, Should I Aerate or Dethatch My Lawn First? Check the active ingredients. For the grub killers, you can stop lawn damage almost immediately especially if you follow the right application guidelines on the label of the pesticide. For best results, Season Long Grub Control Plus Turf Revitalizer should be applied anytime from mid-May through mid-August before grubs or mole crickets hatch. What to do after putting down grub control pesticide. 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. June bugs and European chafers usually lay their eggs in lawns and gardens. There are also products for sale that list grubs on the label that do NOT work for grubs. Products that will NOT kill grubs. The larvae of both species look almost identical. Triazicide will not control grubs. Finding one or two grubs does not indicate you need to apply a grub control product. • •Do not apply to waterlogged soil. 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. Your lawn will still look green and healthy because the damage from their feeding activity will be very minimal. 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. Check out the MSU Landscape and Nursery Management Certificate Program! Grub Control: How to get rid of grubs in the lawn, Billbugs and White Grubs: Control in Home Lawns – 5.516, How Do You Revive St. Augustine Grass? 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. Water your lawn immediately after putting down grub control: Most grub killers and preventers come as granular formulations. Do not use preventive compounds such as clothianidin, thiamethoxam or imidacloprid now. Be sure the problem is grubs. Grub damage may appear in home lawns from mid-September to November or from March to early May. If the damage continues, it is likely the grub treatment was not enough or did not work. The eggs of both species hatch about 10 days after they are laid. 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. Check the bag or bottle to determine what active ingredient the product contains. As temperatures continue to drop with winter approaching, grubs dig down approximately 4-8 inches into the soil and lay there until temperatures start to rise again. By the end of October, they are fully grown. Want to know what is the best treatment to get rid of these pest that are ruining my once nice lawn.

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