Stem end rot
A dark rot develops from the stem end as fruit ripen after harvest. A dark brown to black rot begins at the stem end as a dark brown ring and the rot proceeds towards the other end. The rot produces dark streaking of the water-conducting tissues (this symptom distinguishes stem end rot from anthracnose).
How does it spread: These fungi are natural inhabitants on the branches of the mango tree and grow into the stem of the fruit before harvest. Fruit placed on the ground for desapping can also be infected from the bark, twig litter or the soil.
Crops affected: Mango, avocado, citrus.