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