From No Rust to LOTS of Rust in One Year

12 years ago

Wanted to start another thread so that questions wouldn't get lost. After closer inspection of all (around 90) roses - not sure where my eyeballs have been, but it seems at least 50% of them have some percentage of foliage with rust. I've never seen rust before this year. I have a few that are pretty darned bad (maybe 70%). Others only about 10%. Average about 20% of foliage with rust.

My first thought when I thought I just had one, was to remove it. Now that I see it's everywhere, if I removed everything with rust, well - I'd have a naked garden... I have gone around and removed as much of the rusted foliage as I reasonably could, but it seems an overwhelming task at this point.

So - to spray or not to spray? I liked being a no-spray garden, but am not married to keeping things that way. Presuming the pro's are to keep it under control. What would be the con's? If I don't spray, will it get better with sunshine - in our hot, dry and sunny (well, at least normally) summer?

Thanks.

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Comments (3)

jerijen
12 years ago
This has been an extraordinary year.

I wouldn't make any big decisions based on one atypical spring.

Jeri

The closest I ever came to that was my removal of Midnight Blue. In one of our sort of rare tropical heatwaves, it defoliated literally overnight due to blackspot. It was gone the next day. I don't like ANYTHING quite THAT much.

Jeri
roseseek
12 years ago
IF we get back to our normally hot, DRY summers, the rust outbreaks should subside. Right now, that seems like a really big "IF". I'm taking the opportunity to pass along those which rust really badly to people who do spray or who live where rust pressure isn't quite as bad. To spray or not is your personal choice. I can't/won't. I can't afford the expense right now. Even if I could, I don't think I would. What's going to happen once "synthetic insecticides" are outlawed for home garden use here as they already have been in much of Canada and Europe? This is one reason Pickering discontinued so many roses. We can use this as preparation for when that day arrives (as you know it will). My best reason is, there is very little I can spray I won't react to. My roses are in nearly constant breezes to winds and there is nothing I can do about it. It's the nature of the beast on a hill. They're in full, hot sun which can cause chemical burn from sprays. If you can spray and not become physically affected by it; if it fits your budget and you don't mind that expense for that purpose; if your conditions permit you to spray without further damage, and you don't mind it, spray them. Or, keep track of the worst offenders for when that day comes when we can't spray. Kim
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User
12 years ago
Harmony, keep your nerve - they won't die. Keep a record of the worst offenders and start a rolling replacement. Some years it will be worse than others and it is not inevitable that every year will be as bad. Nothing to do at the moment anyway as the spores are already here so don't rush into a spraying programme. Usually, the leaves will drop of their own accord (try to remove those if possible). Don't go mad with fertilising, best to just make sure they are watered at the base. Next year, you might try a very early preventative systemic fungicide - often, one good blast will prevent later infestations and, imo, might be a small price worth paying (I know I have to, as well as against the dreaded peach leaf curl). Fingers crossed for you from suzy (who also lives with regular rust infestations).

From No Rust to LOTS of Rust in One Year

Comments (3)

jerijen

roseseek

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