Biochemistry inhibits ergosterol biosynthesis (steroid demethylation inhibitor). Mode of action systemic fungicide with protective and curative action. Uses control of many fungi, particularly ascomycetes and basidiomycetes, e.g. Podosphaera leucotricha and venturia inaequalis on apples, guignardia bidwellii and uncinula necator on vines, hemileia vastatrix on coffee, and cercospora spp. On peanuts, at 15-250 gha. Also used on bananas, cucurbits, peppers and other crops. Phytotoxicity non-phytotoxic when used as directed. Some injury noted on mcintosh apples.