What's ravaging my perennials?

Asked June 13, 2020, 12:53 PM EDT

What is spreading quickly through my perennials? In this photo are Veronica, Cranesbill geranium and Eupatorium. This happened last year, too. NO insects in sight on any of these plants. Fungus?
How should I treat it?

Washtenaw County Michigan

1 Response

Hello!

Thank you for using the Ask an Expert service. This damage looks consistent with fourlined plant bug damage to me. They are very quick and hard to catch in action!

Please review the following articles:

Fourlined plant bugs from U. of Minnesota Extension

Fourlined plant bug feeding injury can easily be confused with disease symptoms from MSU Extension

Please let me know if you have further questions.

Regards, Irene