Japanese Beetle Management in Colorado


Japanese beetles on Echinacea (Coneflower)

Hello Gardening Friend - this site is all about the Japanese beetle in Colorado, specifically the Front Range area. It's organized to assist you with research-based management options, timing and plant lists. There's also a very helpful Q & A document from Colorado State University - Dr. Whitney Cranshaw to answer just about every Japanese beetle question you may have.

The management information, and cultural control practices on this site are recommended by horticulture professionals at Colorado State University and the Colorado Department of Agriculture.

Japanese beetles have been active and destructive in my own garden for several years. I have taken a special interest in this voracious pest and wish to help other home gardeners. My goal is to dispel Japanese beetle myths, missteps and present the research-based management control options. We will get through this together!

I remain in touch with horticulture experts in Colorado who are doing a great service to assist home owners and gardeners by providing Japanese beetle fact sheets, ongoing research and more. These links can be found to the upper right, plus additional information in the drop down menu (More).

With understanding of the Japanese beetle's life cycle and the management options that can be used during the larval and adult stages, we'll continue to enjoy our landscape plants and gardens for many years.

About Betty Cahill - I have been teaching gardening classes along the Front Range since the early 2000s. I currently teach classes at Denver Botanic Gardens and area garden centers. I also speak to garden clubs, plant societies, libraries and businesses. Please follow my ad-free garden blog for year round gardening articles.

As a freelance writer - check out my Punch List garden "to do" articles in The Denver Post.

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2020 Battling the Japanese beetle classes at Denver Botanic Gardens

February 27, 2020

March 24, 2020 CANCELLED due to COVID-19

April 9, 2020 CANCELLED due to COVID-19

May 30, 2020 CANCELLED due to COVID-19

July 11, 2020 CANCELLED due to COVID-19

August 8, 2020 CANCELLED due to COVID-19

August 15, 2020 CANCELLED due to COVID-19

I am so sorry not to be able to teach this class. I recommend that you review some of my Denver Post articles and garden blogs on appropriate Japanese beetle management to help you with your plan this summer and fall. Links below. Thank you!

Japanese Beetle August 2020 To Dos and Ponderings

Fight off Japanese Beetle for the Season 2020

Japanese Beetle Battle Plan for Summer 2019

Japanese Beetle Summer Battle Report 2019

Fall Readiness from mid-September 2019