Can somebody diagnose this rose?

General Discussion
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Can somebody diagnose what is ailing this rose? Is it an insect that is eating it? Is that why the leaves are brown?

2

Hi Julie
Your rose is being eaten by rose sawfly larvae. We have had a lot of problems with it in Alberta, Canada this year.

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

3

Agreed, sawfly larvae. I’m not surprised you’re having a greater problem with it this year. They LOVE “green house conditions” so warm, moist like in a greenhouse suits them just fine. From the dead leaves, I think I’d check for spider mites, also.

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Thanks. Sawfly larvae, with maybe spider mites too. I was looking online for organic (not harmful to bees, other pollinators, people, pets or wildlife) ways of treating and preventing sawfly. I like the idea of using green lacewing larvae, but not sure if they would work and temperatures could be getting too cold for them in September, I think they need night time temperatures that don’t drop below 15 degrees Celsius (59 degrees Fahrenheit).