Elm tree - Japanese Beetle - Black granules?

Asked July 20, 2016, 11:40 AM EDT

Howdy, We have an elm that is apparently being visited by Japanese beetles. (Seeing lots of beetles, plus thousands of "skeleton" elm leaves.) The curious thing, though, is the millions of black "granules" that are also appearing. Very small. (Like the granules you'd see in your gutter after you walk on your roof's asphalt shingles, or maybe like coffee grounds.) Anyway, is this related to the beetle? Is it beetle scat? This is in Highland Park, St. Paul. I've attached a photo. Thanks!

Ramsey County Minnesota

2 Responses

What you have described and what's shown in the photo are probably beetle droppings.

Compare here:
https://www.youtube.com/watch?v=vBYqF4r8uoo

Many thanks!

Looking at how much of it is on our patio and tables and chairs, they poop a lot! (Or there are TONS of beetles.)