Rose diseases

Rose — 4 diseases with symptoms, causes and treatment.

• Black spot on roses — symptoms and treatment medium

  Round black spots with feathery margins on rose leaves, yellowing around them and severe defoliation? Black spot on roses — pictures, causes and treatment.

• Powdery mildew on roses — symptoms and treatment medium

  White powdery coating on rose leaves and buds, distorted new growth and buds that fail to open? Powdery mildew on roses — pictures, causes and treatment.

• Rose sawfly (rose slug) — damage and treatment medium

  Rose leaves skeletonized to the veins, translucent window-like patches, small green slug-like larvae underneath? Rose sawfly — pictures, causes and treatment.

• Rust on roses — symptoms and treatment medium

  Orange powdery pustules under rose leaves, yellow spots above, early leaf drop and less flowering? Rust on roses — pictures, causes and treatment options.