Table 1. Severity of powdery mildew, percent of whole leaf canopy, in spring wheat varieties in two regions of Norway, the southern district (Aas near Oslo) and the inland district (Hamar at Mjøsa) with snow cover. Results from hillplot experiments planted late to ensure high infection pressure, registrations are made at Z 70-79.

Variety	Location	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001
Bastian	Aas	2	2	0,1	-	19	11	38	23	45	30
	Hamar	18	47	9	10	18	19	23	28	34	37
Polkka	Aas	1	2	0,2	-	16	19	42	10	35	40
	Hamar	12	32	10	9	17	27	14	22	32	40
Brakar	Aas	1	5	1	-	15	13	39	25	50	37
	Hamar	25	57	13	7	20	27	15	29	21	37
Avle	Aas	-	0	0	-	-	0	0	0	28	42
	Hamar	-	0	0	0	-	1	0	12	32	42