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, UK www.touchwoodplants.co.uk : Seeds & plants by post. Aquilegia specialist. _______________________________________________ Alpine-l mailing list Alpine-l@science.uu.nl http://mailman.science.uu.nl/mailman/listinfo/alpine-l
