I would have to see pictures as to what the different degrees of infection correspond, but I can tell you I am growing 6 mangos: Nam Doc, Malika, Maha Chanok, Jakarta, CoCo cream, Lemon Zest. Out of those the least resistant is the lemon zest... for a moment it had streaks of anthracnose and even an ant infestation that was farming aphids (it was looking pretty bad) while the most resistant is the nam doc a close second is the CoCo cream. I bought a sprayer and some liquid copper and it took care of the anthracnose issue, as for the ants farming the aphids Sevin worked.
-JoeP450