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Spotted stems? Should I be worried

Posted by aahl none7A VA (My Page) on
Tue, Mar 11, 14 at 22:33

I just pruned and about a third of my 60 bushes has some canes like the one pictured. All seem healthy and until the very end last year I has the least disease I have had in 30 years. Regular spray program is Banner Maxx alternating with Mancozeb. Any thoughts??

This post was edited by aahl on Tue, Mar 11, 14 at 22:48


Follow-Up Postings:

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RE: Spotted stems? Should I be worried

  • Posted by seil z6b MI (My Page) on
    Wed, Mar 12, 14 at 11:14

Sometimes black spot will over winter on the canes and cause these spots to appear.


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RE: Spotted stems? Should I be worried

I have it as well on a couple of my roses.
So how do I get rid of it? What is the out come for canes like the one pictured


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RE: Spotted stems? Should I be worried

It is probably blackspot, as seil said. The only way to get rid of it is to remove those canes. Since aahl has a good fungicide application program in place, that should handle any issues with blackspot going forward, given that the application is started early.


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RE: Spotted stems? Should I be worried

  • Posted by seil z6b MI (My Page) on
    Wed, Mar 12, 14 at 19:17

I don't usually prune them off unless there is some other issue that would require it to be removed. Black spot is out there everywhere and whether you have some spots on the canes or not the plant may still get it at a later date when the conditions are right for it to grow.


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RE: Spotted stems? Should I be worried

What seil said. I don't cut them off either. Note that once blacksopt occurs you can't "remove" or "get rid" of the spots.


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