I have a rose on the east side of house which has it's leaves chewed on badly, some almost completely gone. What causes this and control method? Thank you, Paul.
Multnomah County Oregon roses
Thank you for your rose question. Without seeing a picture of the leaves and the rosebush, it's impossible to diagnose your insect with complete certainty. However, we are currently experiencing infestations of the Japanese beetle, and its pupae eat the leaves during the night, as this article explains. Here is a link to a recent article about them in Portland, which recommends reporting but not chemical treatment at this point. Suggest you do some detective work at night to see if you can positively identify the culprit as a Japanese beetle.
Hope this is helpful. Good luck!