Fungicide with protective, curative, eradicative and long residual disease control; acts by inhibiting spore germination. Quinone outside Inhibitor. Inhibits mitochondrial respiration by blocking electron transfer between cytochrome b and cytochrome c1, at the ubiquinol oxidising site. Selectivity is partly due to enzymic de-esterification within plants.
Uses: Control of scab in apples and pears Venturia spp. ; powdery mildew on apples Podosphaera leucotricha ,vines Uncinula necator, cucurbits Sphaerotheca fuliginea and sugar beet Erysiphe betae ; mildew Erysiphe graminis , scald Rhynchosporium secalis , net blotch Pyrenophora teres and glume blotch Septoria nodorum on cereals; and mildew Leveillula taurica, Erysiphe spp., Alternaria spp. on vegetables.