Meet the beetles

Invasive species spotted in Post Falls; agriculture officials ask for help

Print Article

Have you seen me? The State Department of Agriculture reports an increased amount of Japanese beetles in Idaho, an unwanted guest in the Gem State.

Sometime in or before 1916 it came to the United States as a hitchhiker, nestled in the soil of some potted plants.

Perhaps someone smuggled them on board intentionally - who's to say?

But at some point around 1916 the Japanese beetle, with its shiny metallic green shell, left its home island and crossed the ocean to immigrate to America.

Nearly a century later, the crop and flower-eating insects have flocked to Kootenai County for the first time.

Not that the Idaho State Department of Agriculture is thrilled about the new arrival.

It's the opposite, in fact

"We're a little more than alert," said Mike Cooper, bureau chief in the department's plant division, on what could be Idaho's newest problem - possible infestation. "I'd say we're concerned."

The insect, quite frankly, is a pest, according to the department.

The USDA looks down on the Japanese beetle too, working with commercial flights and delivery companies Fed Ex and UPS at ports back east to inspect for the intruder.

Despite these efforts, the Japanese beetle has worked its way west, including Idaho.

"It's when you start catching dozens, you start to worry," said Cooper, which is exactly what started happening around Boise earlier this month. "That kind of raises an eyebrow."

The beetle has always been spotted - and trapped - in southern Idaho singly or by pairs since the early 1990s. No big deal when they show up in spots, in low numbers. But earlier this month they've caught two dozen, more in the last two weeks than they have in 25 years.

And for the first time up north, as two were trapped in Post Falls recently. Cooper didn't know the exact location except that it was on commercial property near Interstate 90.

"When a population gets going, they'll get going by the thousands," Cooper said.

Which is what the concern is.

What does the beetle - about a half inch long with copper-brown wing covers atop its green coat and white stripes on the side - do?

Eats and destroys lots of things.

It has around 300 hosts, including trees, rose bushes, flowers, stonefruits, and garden and field crops. They leave holes and skeletonized leaves. The larvae, or grubs, live under the soil surface and destroy patches of turf by feeding on roots of grass. When they eat in numbers, they can wipe out entire plots.

Asked if they provide any benefit, Cooper said: "None that I know of."

But the state isn't sounding the infestation alarm yet. It hasn't noticed crop damage. But the department is setting multiple specially-designed traps in the isolated areas to try and get a better gage of the numbers.

It is suspected the beetles migrated from the East Coast, because the east had a swell in numbers last year. The beetles need moist soil to live, however, and because the Midwest is suffering from drought, the state doesn't expect them to survive a cross-country journey this year - so if they can trap the ones already here, the population might not grow.

If you suspect you have found a Japanese beetle, seal a dead specimen or two in a sandwich bag and mail in a regular envelope to: Idaho State Department of Agriculture, Plant Industries Division, P.O. Box 790 Boise, ID 83701 and include your name, address and phone number, or call (208) 332-8620 to report the possible find.

Print Article

Read More Local News


May 29, 2017 at 5:00 am | Coeur d'Alene Press HAYDEN Gary Brennecke said that, during his career with the United States Postal Service, he regularly raised and lowered American flags. But, until recently, the now retired Brennecke had always...


Read More

Post Falls to address city center parking

May 29, 2017 at 5:00 am | Coeur d'Alene Press By BRIAN WALKER Staff Writer POST FALLS As more businesses explore locating to Post Falls' city center, the lack of adequate parking has become an issue the city hopes to address. The City Cou...


Read More

Many ways to honor fallen heroes today

May 29, 2017 at 5:00 am | Coeur d'Alene Press Memorial Day is a day of remembrance for those who gave it all to secure the freedoms we enjoy today. Sacrifice is meaningless without honoring those who gave so much, and here in this veteran-friend...


Read More

A Vision to help kids read better

May 28, 2017 at 5:00 am | Coeur d'Alene Press Art projects lined the tables spread across the gymnasium in Bryan Elementary School. The projects acted as centerpieces while parents and their children ate breakfast and read together at the annual...


Read More

Contact Us

(208) 664-8176
215 N. Second St
Coeur d'Alene, Idaho 83814

©2017 The Coeur d'Alene Press Terms of Use Privacy Policy