How to Protect Your Plants and Flowers From Japanese Beetles In Denver

Fielding Tree Japanese Beetles Denver


Riverton, New Jersey, 1916.

Why does a random place back east and a time over a century ago matter? It’s the first known instance when Japanese beetles were confirmed to be present in the United States. Since that time this menace of a little bug made its way across the U.S. to the Mile High city of Denver. The Japanese beetle (popillia japonica) is arguably one of the most devastating threats to landscaping, namely flowers.

Identifying Japanese Beetles

What does a Japanese beetle look like? What are some of the telltale markers of Japanese beetles? Most importantly, is there anything we can do to stop Japanese beetles?

For starters, we need to know how to identify Japanese beetles. The horticulture experts at Colorado State University give an excellent description of the Japanese beetle:

“The adult Japanese beetle has an oval form is about 7/16-inch in length. It is generally metallic green with coppery-brown wing covers, which do not quite cover the tip of the abdomen. Along the sides are five patches of whitish hairs. The antennae are clubbed at the end and may spread to a fan-like form.” (Colorado State University Extension)

While the Japanese beetle may not have as devastating effect as the Emerald Ash Borer beetle, there’s no question how much of a threat is posed by this oval-shaped archenemy of green-thumbed weekenders. Thankfully, there are several effective treatments to stop Japanese beetles from attacking your landscaping.

How to Protect Your Flowers from Japanese Beetles

Unfortunately, there is no magic bullet for stopping Japanese beetles in their tracks. Japanese beetles hibernate as grubs in the lawn during the winter months. Adding a standard soil application over your lawn can help kill off grubs. There’s no guarantee of complete eradication because of one reason: Japanese beetles are mobile.

It’s best to work together with your neighbors to use a combination of lawn applications, physical removal of the beetles from plants, and soil injections at the base of plants. This will deter the Japanese beetles from advancing to your shrubs, flowers, and vines. Avoid using Japanese beetle traps because the traps are not always effective and actually tend to attract more beetles over time. If you want to keep shallow pans of soapy water underneath your plants, the adult beetles will fall off plants as a defense mechanism. Landing in the soapy water will ensure their demise.

Fielding Tree and Shrub Care Knows How to Take on Japanese Beetles

Our Fielding Tree and Shrub Care team can stop the damages of Japanese beetles. We use safe and proven soil injections to protect your trees and plants from their invasion. If your property is under attack from Japanese beetles, your first call is to our Fielding Tree and Shrub Care team. Schedule your complimentary inspection to confirm the presence of Japanese beetles today.

Fielding Tree protects against Japanese beetles in Denver, Lakewood, Littleton, Highlands Ranch, Lone Tree, Centennial, Parker, Castle Rock, and other parts of Douglas County, Colorado.