Fungicide with protective, curative, eradicative and long residual disease control; acts by inhibiting spore germination. Redistribution via the vapour phase contributes to activity. Control of scab in apples and pears; powdery mildew on apples, vines, cucurbitsand sugar beet; mildew, scald, net blotch and glume blotch on cereals; and mildew on vegetables.