![]() ![]() The grubs you kill in your lawn have little bearing on how numerous the adults will be. ![]() St Gabriel also makes a granular version for spreaders that will require several applications over a two-year period to achieve the best results.īut be sure to remember that if your hope is to see fewer adults by treating the grubs, you may be disappointed. The Garden Center carries Milky Spore Powder in several sizes, as well as the necessary applicator. It isn’t harmful to humans, pets or the environment and only kills the Japanese Beetles in the grub stage, making it safe for beneficial insects. If you’re looking for organic grub control, Milky Spore Powder by St Gabriel Organics is a one-time application that is guaranteed by the manufacturer to control grubs for ten years. This product contains an ingredient that kills white grubs, including Japanese Beetles and June Bugs, along with several others. Early July thru mid-September is the best time to apply Bayer Advanced’s Season Long Grub Control. As the adults feed and return to the soil to lay eggs, grubicides do an excellent job of killing the young larvae. A sharp fling onto a hard surface, followed by a quick stomp is also an effective, as well as satisfying method, though your neighbors may wonder if you’re practicing a new dance step.Īnd what about controlling the grub stage? Since a Japanese Beetle spends about 85% of its life underground as a grub, exercising control over them while they’re in your lawn is a very effective method to prevent damage to the grass. This will break the surface tension of the water, so that when you pop those voracious monsters in the pail, they will sink, not float. Fill a small bucket with water and swish in a few drops of liquid dish soap. The old-fashioned methods, like handpicking, can be really good options if the populations are low. And it will only kill the insects that eat leaves, flowers and fruit, making it safer for beneficials like bees and butterflies. Not as fast as the contact insecticides, but it is just as effective and considered an organic pesticide. As Spinosad affects the digestive system, there will be some feeding, but beetles will die within a couple of days. The active ingredient is Spinosad which requires that the pest in question ingests the insecticide. It primarily targets munching insects like beetles and caterpillars. Covering during the harvest period will protect the fruit and keeps the insecticide off your produce.Īnother option is Captain Jack’s Dead Bug. ![]() Beetles fly and land on plants, tending not to crawl up and onto them. Bear in mind that it is non-specific and will kill any insect that is sprayed, so try not to apply if there are bees or other pollinators around.Ĭonsider too, erecting a barrier over your edible plants, like strawberries, summer-bearing raspberries and green beans with those handy floating row covers that you got for frost protection just a few short weeks ago. It is safe to use on edibles and ornamentals, and can be applied every 3 days if the insect pressure is high. Japanese Beetle Killer by Bonide is a great, ready-to-spray, contact insecticide that allows you to treat your small trees, as well as shrubs and roses. When your roses and trumpet-vines are crawling with beetles, munching and copulating, you want to DO something. Not much has changed for treatment of adult beetles. A combination of milky spore and diatomaceous earth works well at killing Japanese beetles and disrupting their life cycle.It’s June and by the end of the month, many a gardeners’ most hated day of the entire summer will be here – the annual emergence of the dreaded Japanese Beetles. But it will also kill most other insects that come in contact with it, as well. In order to kill them, you need to use milky spore powder, which is perfectly tailored to target Japanese beetle larva only.Ī big benefit of diatomaceous earth is that it is 100% natural. Keep in mind that the powder is washed away during the rain so it will possibly need to be reapplied a few times during Japanese beetle season.Īnother caveat is that diatomaceous earth only kills the adult Japanese beetles but not the grubs or larva that live underground. Obviously, it is impossible to apply the powder directly to the foliage plants but it can be applied at ground level and will kill the adults that crawl on it. It lodges in the beetles exoskeleton and dehydrates it to death.ĭiatomaceous earth kills Japanese beetles quickly, usually within 24 hours after contact. Johnĭiatomaceous earth can be used to kill Japanese beetles and most other ground dwelling insects. Diatomite (diatomaceous earth) by James St. ![]()
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