What Is The Disease On These 2 Mango Plants?

Question

Not sure what the disease is on these mango plants, or how to treat it? Thanks.

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Answer 1

it's hard to tell from the photo, but the first one could be rust, the whitish one could be powdery mildew. The black could be sooty mold from honeydew left by insects. These articles should help narrow it down:

https://www.gardeningknowhow.com/plant-problems/disease/learn-about-plant-rust-disease-and-rust-treatment.htm
https://www.gardeningknowhow.com/edible/fruits/mango/mango-tree-diseases.htm
https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm