First noticed this on some leaves a week ago and now it is spreading. Orange color and when dry is powdery.
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The close-ups are a little fuzzy but it looks like rust to me. What is the cultivar?
It does look like rust, although I have only seen rust on the undersides of leaves. You have a little antracnose going on also. The photos are a bit fuzzy-try better focus and repost.
If this is rust then it is a different kind than what is normally here.
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[attachment 625 morebad014.JPG] I can’t get the focus but these are round puff balls next each other.
It appears to be rust to me, too. It’s the main scourge of roses on my hill.
This is a little bit better picture, and I still think it is rust–just a little bigger, more muscular, happier strain than you might usually see. Do you get a lot of virulent rose variety rust where you live? The weather patterns have been kinda “unique” this year and are favoring one thing over another, including diseases.
This is the first ever seen of this kind around here and is going to spread fast the way the spores are released so easily. The other kind is much smaller and covers a lot of the leaf, redish I think. Never had rust till a neighbor brought it in on a Love an Peace. Neil
Rust is pretty rampant here in SoCal, and I have seen some pretty large pustules of the orange stuff. Some plants are totally immune to it, and others are little rust factories. I think many of the young seedlings that might grow out of it, or develop some immunity to it, still might show a few small spots. I’m trying to keep track of that this yr because here it is always rust season, but in a bit bigger way than usual this yr. When germination pretty much stopped this yr, I had 2000 seedlings (almost to the exact #) and out of those, I have maybe 15 or 20 with blackspot (two totally defoliated) , 40-50 with rust (only one really, really bad) and maybe 500 with some degree of mildew, with about 150 of those dumped before they bloomed. I don’t have the luxury of a six to eight hr sun day until about May 15th, which makes a big difference with the mildew. But, it makes sorting them out a bit easier, and if you are going to select for health and vigor, how are you going to sort if there are no antagonists?