Black Spot Disease of Mango
Although the symptoms on leaves and fruits are by far the most commonly observed symptoms, Xanthomonas sp. mangiferaeindicae may cause lesions on all the aerial parts of the mango tree.
The first visual signs on the laves are small angular oily looking spots measuring 1-3 mm and delimited by the veins, They then turn black and appear in relief on both sides of the leaves.
Most often young lesions have an oily looking margin and are surrounded by a chlorotic halo. Old foliar lesions are brown and then become ash grey.
X. sp. mangiferaeindicae does not cause tree mortality but reduces the yield of susceptible cultivars sometimes drastically, due to very heavy defoliation.
Disease incidence is acute on these cultivars in all regions with concomitant hot and humid periods.
The disease was first observed on herbarium specimens collected from India in 1880.
Black Spot Disease of Mango
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