Bacterial Black Spot

Bacterial black spot is a bacterial disease caused by Xanthomonas campestris pv. mangiferaeindicae. It can potentially be more damaging to flowers than anthracnose. Leaf lesions consist of black, raised, angular areas, restricted by the veins and frequently surrounded by a yellow margin. Elongated stem cankers occur on the bark and can cause terminal die back. Fruit lesions consist of individual or multiple star-shaped cracks, often appearing with anthracnose lesions in a tear stain pattern. Unlike anthracnose, bacterial lesions do not expand as the fruit ripen.