Is this cedar rust? - Ask Extension
Can you tell me if this is cedar rust or some other kind of disease? The first picture is my lilac bush where a section has turned brown and is dyin...
Knowledgebase
Is this cedar rust? #843986
Asked August 03, 2023, 11:33 AM EDT
Can you tell me if this is cedar rust or some other kind of disease? The first picture is my lilac bush where a section has turned brown and is dying. The second one is my lilac bush which is starting to turn brown and has a white mold on it. The third picture is a peony bush that started out yellow and turned brown. I also have a butterfly bush that has brown spots on it. I am trying to figure out how to treat this so my other flowers do not get this.
Thank you.
Yuma County Colorado
Expert Response
None of the above pictures has cedar rust. The lilac has a powdery mildew. Here is a link to a CSU Fact Sheet on Powdery Mildew:
Powdery Mildews (colostate.edu)
The first lilac might have bacterial blight on the leaves though it isn't a good picture. Here is a link to help:
How to recognize, treat and avoid lilac bacterial blight | OSU Extension Service (oregonstate.edu)
Please tell me a bit more about the peony? You can email me at <personal data hidden>
Thanks.
Linda
Powdery Mildews (colostate.edu)
The first lilac might have bacterial blight on the leaves though it isn't a good picture. Here is a link to help:
How to recognize, treat and avoid lilac bacterial blight | OSU Extension Service (oregonstate.edu)
Please tell me a bit more about the peony? You can email me at <personal data hidden>
Thanks.
Linda
