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Dogbane Beetles Widely Reported (07/13/17)

With all of the recent media attention surrounding Japanese beetles in North Dakota, and our request to document and report any suspect insects, NDSU Extension Entomology has received several insect identification requests via photographs and actual samples.

Dogbane Beetles Widely Reported

With all of the recent media attention surrounding beauzay beetlesJapanese beetles n North Dakota, and our request to document and report any suspect insects, NDSU Extension Entomology has received several insect identification requests via photographs and actual samples. Without exception, all specimens have been dogbane beetles. Dogbane beetles can be easily confused with Japanese beetles, but these illustrations should help. Both beetles have green thoraxes and red-coppery wing covers and are about the same size, but dogbane beetles are more rounded with almost mirror-like iridescence, while Japanese beetles have flattened backs and are not as shiny. Dogbane beetles have slender antennae that only gradually widen at the ends, while Japanese beetles have antennae that end in a layered club. Also, Japanese beetles have white hair patches along the sides of the abdomen – dogbane beetles lack these hair patches.

Dogbane beetles are found on or close to their host plant species, dogbane (also known as Indian hemp). They can be found occasionally on milkweed.

We very much appreciate the insect identification requests on Japanese beetle! Please continue to be vigilant through the summer months and report any suspect Japanese beetles to your local County Extension office, to the NDSU Plant Diagnostic Lab, or directly to NDSU Extension Entomology.

Patrick Beauzay

Research Specialist, Extension Entomology

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