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Re: Blackspot fungus -- what to do?

Steve: I don't use anything on my rugosas and hybrid perpetual roses for
blackspot and I am in the HEART of blackspot country. They ALWAYS get
blackspot - but because they are tougher than tea roses, they shake it off
and keep right on blooming.

Rosemary in Lexington, KY - humid today!
zone 6


At 12:05 PM 6/9/97 +0000, you wrote:
>I have been growing roses for only a few years and have only planted
>disease resistant varieties.  This is the first time i (think) i have
>black spot problems.
>
>I have a Charles Abanel (canadian explorer series) which has always been
>very healty.  In addition to the classic black spot symptoms it seems that
>the leaf edges are browning, too.  This occurs more on younger leaves
>than older ones.
>
>I know one should not use chemicals on rugosa roses and their hybrids due
>to their dislike of chemicals and subsequent leaf drop.  So, what should I
>do for this black spot?  It was suggested that i use 1 tbl spoon of baking
>soda to a gallon of water.  Will this defoliate the rose or is it okay?
>
>I appreciate you responses.  TIA 
>
>    Steve  graf@aldus.northnet.org
>    usda zone 4b/5a in the beautiful Champlain Valley of NY 
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