• slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
Dealing-with-Japanese-Beetles-without-Pesticides.jpg

Dealing with Japanese Beetles without Pesticides

The Japanese beetles are back. I do not like to use pesticides since the beetles are often feeding on the flowers where the bees would be visiting. Please help.

Gardeners who have been battling this pest for years often live with the damage. Healthy plants can usually withstand the feeding damage. The safest but time consuming control option is to knock the beetles into a can of soapy water. The soap clogs the air exchange openings (spiracles) on the insect’s body. Milky spore is a bacteria that kills the grub stage of Japanese beetles. It is applied to lawn areas and takes about three years to get established and provide significant control. You can NOT use any pesticides on the lawn when using this control option. The milky spore will provide some relief but keep in mind adult Japanese beetles may continue to fly in from surrounding properties. You and your neighbors may want to work together for better control.  I am not a fan of traps. Research has shown that the traps draw more of the insects into your landscape.

Related

Upcoming Live Events
& Webinars

Jan. 28, 2026
FREE WEBINAR: 
Past, Present & Future of Mitchell Park and its Conservatory, the Domes  
Register here

Feb. 13 - 15, 2026
PBS Wisconsin
Garden & Green Living EXPO

Madison, WI
More information

Feb. 18, 2026
FREE WEBINAR: 
Plants that Go the Distance
Register here

Feb. 25, 2026
FREE WEBINAR:
Flowering Houseplants

Register here

Mar. 5, 2026
FREE WEBINAR:
Start New Plants from Seeds, Cuttings and More

Register here

Mar. 11, 2026
FREE WEBINAR:
Save Money & Boost Your Growing Success with Bare Root Plants

Register here

Mar. 18, 2026
FREE WEBINAR:
Patio, Deck and Balcony Gardens

Register here

March 26, 2026
FREE WEBINAR: 
Getting Started Growing Vegetable and Flower Gardens
Register here

WATCH ON-DEMAND WEBINARS

Learn More

Book an Appearance

Learn More

Enter for the chance to win a Milwaukee Domes Alliance membership & merchandise!

ENTER NOW