Rose bush brown leaves - Ask Extension
I am hoping you can help me fix my rosebush which has recently developed brown leaves over the past week please see the picture below thank you
Knowledgebase
Rose bush brown leaves #754598
Asked June 07, 2021, 5:13 PM EDT
I am hoping you can help me fix my rosebush which has recently developed brown leaves over the past week please see the picture below thank you
Hennepin County Minnesota
Expert Response
What you are seeing is called window paining. An insect is scraping off the top layer of the leaves and eating it. It is probably the rose saw fly.
https://www.missouribotanicalgarden.org/gardens-gardening/your-garden/help-for-the-home-gardener/advice-tips-resources/pests-and-problems/insects/sawflies/rose-and-pear-slugs-sawflies.aspx
The damage looks like something called window paining. It is the result of an insect scraping the top of the leaf to eat the tissue. Combined with hot weather the leaf dries out quickly. The damage is probably being done by the rose Sawfly.
