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How to treat grape vines infested with Japanese beetles? #417762

Asked July 29, 2017, 5:23 PM EDT

Hello, The grape vines overgrown on the fences that surround our yard are infested with Japanese beetles. They have moved from grape vines to our rose bushes. What is the best way to treat? I've tried picking them off, but there are hundreds. Is there a safe chemical? Do we cut down the vines first and then treat or treat and then cut down the vines? We have a dog. We have some herbs, tomatoes, and flowers growing as well. This is my first encounter with Japanese Beetles. I would appreciate any specific information you can give me. Thank-you, Teresa Whitman

Ramsey County Minnesota

Expert Response

Foliar applications of an insecticide such as permethrin, carbaryl, or malathion can help reduce the Japanese beetle population on your grapes.

https://www.extension.umn.edu/garden/insects/find/grape-insect-pests-of-the-home-garden/#JapaneseBeetle

Spray roses with a garden insecticide, such as carbaryl (Sevin) or permethrin, to reduce damage for a few days. Repeated applications will be necessary to maintain control. Avoid spraying rose flowers, as many insecticides are toxic to bees.  You could cover your roses with fine mesh netting or screening material. Japanese beetle traps do not work to reduce the amount of plant damage. Japanese beetles typically lay their eggs in moist, grassy areas.  You will have less beetle larvae damage if you do not irrigate your lawn.

http://blog-yard-garden-news.extension.umn.edu/2017/07/dealing-with-japanese-beetles.html

http://www.extension.umn.edu/garden/insects/find/japanese-beetles/

You dog should not eat any of these chemicals.


Pat M MN master gardener and TCA Replied July 29, 2017, 8:19 PM EDT

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