Purpleleaf Sandcherry - fungus?

Question

Hello,We planted a Purpleleaf Sandcherry three springs ago.  Every summer sincethen it develops black (or dark) spots on the leaves.  The leaves then turnto a pale red/yellowish and green colour.  It's happened again this spring,but very early, right after it flowered.  A local store recommended afungicide last year, which we applied with no results.  I've reapplied againlast week, but it's getting worse.Is there something I can do.   It is planted at the side of the front porch,with sun most of the day.  The downspout is near by, but there never appearsto be excess water.Any help would be great.thanksChris

David J Bockman · Accepted Answer

You don't mention where you are, however Michael Dirr notes that 'All P. X CISTENA types in Zone 7b and 8 struggle and are almost defoliated by late summer. They are much better adapted in the northern climes.'

Dave

bla · Answer

I'm in Ottawa, Ontario, Canada.They are sold at all of the local area garden centres, so i'd assume they'reok for this zone.

Yngver · Answer

It sounds like blackspot, which roses get, but I don't know if sandcherries are susceptible. But it does sound like some kind of fungus. If so, you have to remove all the infected leaves--the fungicide won't help what's already infected, they just help prevent further infection. Blackspot thrives in damp conditions, but again, I don't know if that's what you have.

"bla" snipped-for-privacy@bla.com wrote:

Kris · Answer

thank yousandcherries are

Marley1372 · Answer

Probably not blackspot, but I do know that plum pox is a big problem in canadarigh tnow, you might want to google it and see what you can find.Toad

Purpleleaf Sandcherry - fungus?

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