Japanese Beetles eat Chinese Elm: 100 Year Anniversary of Accidental Introduction

Subject: Flying Beetle ?
Location: Inver Grove Heights MN
July 4, 2016 3:54 pm
Found on cut Chinese Elm
Signature: Jeff G

Japanese Beetles
Japanese Beetles

Dear Jeff,
These are invasive, exotic Japanese Beetles, an introduced species that has been plaguing North American gardeners for the past century.  According to BugGuide:  “The original U.S. population was detected in New Jersey in 1916, having been introduced from Japan” which makes 2016 the 100th Anniversary of their introduction.  BugGuide also notes:  “Larvae feed on roots of many plants. Adults feed on foliage, flowers and fruits of various plants.”  Mom, who is an avid gardener, refers to the feeding pattern, which is evident in your image, as creating “lace doilies” from the leaves of plants.

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