Madagascar Jasmine Leaf Spots: Fungal or Bacterial Infection

Recessed tan spots with black edges on lower leaves of Madagascar jasmine (Stephanotis), plus yellowing and warping, indicate a fungal or bacterial leaf spot—not insects.

Treatment

1. Buy copper fungicide (e.g., Fertilome Copper Fungicide)—effective against both fungi and bacteria.
2. Mix per label for ornamental plants. Spray every 10–14 days for 2–3 applications.
3. Avoid spraying in bright sun to prevent phytotoxicity.
4. Remove and dispose of spotted leaves away from the plant.

Monitoring

Watch for new spots moving up the plant. Copper prevents new infections; existing spots won’t heal. Improve air circulation and avoid overhead watering.