profesora said:Thank you for all your inputs. It looks like this is a subject that needs a lot more experimentation and research. I have read that rust does not survive the cold winter, but some of you indicate otherwise.
I need more time to observe my plants and try different methods of dealing with rust. I did spray some and more will be sprayed. I am always concerned about new arrivals. They arrive when I am most busy and I do not spray them immediately.
Would it be worthwhile to spray the soil when preparing for new arrivals?
It's not the cold function that kills the viable spores, as it will overwinter on patrina.
For us its the function of our plants losing all their living foliage. So in these colder zones 7 and so and down, when the plant goes Dormant or the SEV/EV's die back to crown the rust spores no longer have a viable host in which to live.
If rust does concern you... as it does me since I operate a heated greenhouse year round now... You can read this blog entry of mine which I go into some detail on the products I have used, and continue to use to combat rust.
http://northerngreenhouse.blog...
I see someone mentioned using heritage as a drench. As this is a MOA for Azoxystrobin but unless you only have 5 or 10 plants I would use it as a foliar spray since it will be far more effective and cost effective.
