For suppression of powdery mildew on greenhouse cucumbers, field cucurbits – Crop Group 9B (including cucumbers, squashes and pumpkins, greenhouse and field mint, on hemp, on cannabis (marihuana) produced commercially indoors and field-grown, and on greenhouse ornamentals including cut flowers; downy mildew on greenhouse cucumbers bacterial canker on field and greenhouse tomatoes; and powdery mildew and black spot on greenhouse roses.