Ted, it is related to downy mildew of impatiens only because it is a downy 
mildew. Currently scientists have no idea from where it has arisen.
Downy mildews are more like blights than like powdery mildew.
Spores may live many years in soil, and I do not know whether winter weather 
makes much difference (here last winter was extremely mild, usually a wet 
zone 8/9)
warm and wet spring/summer/autumn conditions encourage rapid spread (like eg 
potato blight conditions)

Best Wishes, Carrie Thomas Tel 01792 522443
'Touchwood', 4 Clyne Valley Cottages, Killay, Swansea, SA2 7DU South Wales, 

www.touchwoodplants.co.uk : Seeds & plants by post. Aquilegia specialist.

Alpine-l mailing list

Reply via email to