What is eating into the stems of my heuchera and heucherella?

Asked July 19, 2020, 10:21 PM EDT

I seem to have something...a little larva maybe or something else that causes a hole in the thin stems and the flowers fall off. The same things happens with the leaf stems...those leaves will wilt more often than they break off. What should I do to stop it. This is the second year I have had the problem.

Looking at the stem closely, the hole left is like a round pocket and not at all like something chewed on the stem.

Thank you so much for your time. I used to be a Senior Master Gardener with Colorado State and this has me puzzled.

Flathead County Montana

1 Response

It would be helpful to see some pictures or take samples into your county office in Kalispell, or send off to the Schutter Diagnostic lab at MSU https://diagnostics.montana.edu/physical_sample_submission.html