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Aaaaaaack...

My two shrub roses, 'All That Jazz', have defoliated after some pronounced 
large brown blotches followed by yellowed leaves. This rose has shiny leaves 
and is supposedly impervious to disease. We've had a cool summer with rain 
thru most of
July (unusual)...never had this happen before. Have disposed all fallen 
leaves. Tiny new branches seem to be developing here and there on the main 
canes. Sick to pieces as the blooms were fabulous (1st and 2nd year bushes). 
The roses looked wonderful until one day they had dropped 1/2 their 
leaves...99% of the rest decamped last night. Is this blackspot? 

Distressed in Northern Illinois
(Joanie Anderson, N. of Chicago)
 

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