88: 846-854. The product’s effects lasts for up to four months. 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. They are not as effective as the preventive compounds in reducing grub numbers. 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. A garden center owner asks about alternatives to standard grub control insecticides. Dylox … 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. Check the active ingredients. Dave Smitley, Michigan State University Extension, Department of Entomology - These products do not work as well (maybe 50 percent control) as standard products applied in spring or summer to prevent grub damage the next fall and spring. 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). 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. However, even trichlorfon should not be evaluated for at least five days after application (assuming it rains or irrigation was applied), and carbaryl may need three to four weeks to be effective. Scotts GrubEx vs Bayer Grub Killer Plus. The standard, and highly effective, grub control insecticides are products that contain imidacloprid, clothianidin or thiomethoxam. Not all the grub control products on store shelves will be effective this spring. 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. If there is nothing flowering in the lawn, there is nothing in it that would attract bees. Both compounds work equally well on Japanese beetle grubs. 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. 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. ... GrubEx or Dylox… 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. I thought others may have the same question. Neither of the products listed grubs on the label printed on the bag and neither of the products would have controlled grubs. Lawn sprinklers can be used if you do not have an irrigation system. One trichlorfon product has “24 Hour Grub Control” in its name and would seem to indicate that it will kill grubs in 24 hours. Annual bluegrass weevils (larvae and adult), armyworms, chinch bugs, cutworms, sod webworms, white grubs. This also moves the chemical off the grass and will make the yard safe for children, pets and wildlife after the yard is dry. 1995. Sometimes the best offense is the best defense. 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