Southern Blush, Haden, Lemon Zest, are quite impacted--- in dry weather, little-to-no irrigation, coastal zone.
Last year, Burmese and Thai mangos, except Pim Sen Mun, were noticeably infected: Elephant-Tusk, Po Pyu Kalay, Nam Doc Mai, and less on Chocanon and Pram Kai Mea.
This year I have found MBBS on only two trees of Po Pyu Kalay, while ten or so are still clean. The worse affected is a tree at the top of the hill, solitary, wind-whipped.
Last year, the first part of the crop of Kent and Keitt to reach near-maturity were destroyed by MBBS and various rots. After switching to every-other-day SANITATION-HARVESTING of problem trees, the remainder of the crop was slightly spotted and picked a little sooner than one would prefer, or even clean and well-matured.
My general impression is that nutritional sprays of Potassium Silicate, Kelp, and various Copper products, Chelated Calcium, and Boron, improve plant resistance.
And spray with Oxidate (Hydrogen Peroxide, with stabilizers suitable for plants, and approved for "organic production") can improve sanitation. This is way too DANGEROUS for persons who are ignorantly cavalier about following precautions as specified on labels--- the concentrate can cause instant blindness and severe skin burns and open holes in clothing. While mixing, one must have rubber apron, rubber boots, heavy rubber gloves, safety glasses and plastic face shield. AFTER you are finished mixing, then the spray is very safe--- you'd probably be fine with safety glasses and a Speedo!
Vigilant sanitation-harvesting, only of problem trees, beginning as fruits near maturity, seems to make the most difference. (A quick glance/ spot check of the other trees every couple of weeks will determine if any of those should be checked more.) Look at both front side and back side of fruits, and check where they are touching each other and where they are touching branches. Remove any with even the smallest raised, shiny-coal-black spot. These fruits will be great for the world's many and varied recipes that call for green mangos.