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Black Spot

Fungal

Plant disease guide — symptoms, causes, treatment, and prevention.

symptoms

Symptoms

  • circleCircular black spots on rose leaves
  • circleYellow leaf halos
  • circlePremature defoliation
help

Causes

Caused by Diplocarpon rosae. Spreads in wet conditions.

healing

Treatment

Remove infected leaves. Apply rose fungicide. Repeat weekly in wet weather.

shield

Prevention

Choose resistant rose varieties. Water at base. Good air circulation.

Black Spot — Plant Disease Guide | GreenScout