Japanese Beetles - Knowledgebase Question

utica, Ne
Question by bdporta
March 24, 2010
What do I treat my lawn with to get rid of those darn beetles in the summer?

Answer from NGA
March 24, 2010


Japanese beetle grubs are best controlled by spraying beneficial nematodes on the lawn and garden area. These microscopic worm-like creatures attack only the grubs in the soil and not plants, animals or humans. Spray them in spring when the soil temperatures are above 55F and you should see a difference in summer. It's important to maintain soil moisture to keep the nematodes viable and so they can move easily through the soil. I suggest that you moisten soil well the day before you apply them, or wait until after it rains. Another product is milky spore powder, a naturally-occurring bacteria that kills grubs; you simply apply the powder in a grid pattern on your lawn. The powder is harmless to earthworms and other creatures. The bacteria will continue to multiply, and will keep working for up to 20 years. (The results won't be immediate, however; it will take some time to notice a decline in the grub population.) Bayer Advanced Season Long Grub Control and Grubex are also products to consider using. Be sure to apply according to label directions. Hope this info helps!

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