Where are you growing these? I have Mangos in the ground in Florida and they are prone to fungal problems. The recommendation is to use a copper fungicide every month until flowering. After the fruit begins to form begin spray every two weeks. This is what I do outdoors in Florida.

I think more information about where you live and how you grow your plant would be helpful.

Jane

thanks for your reply jane__ny(9-10),

Tirana, Albania here has mainly a mediterranean climate and winter will come
in november sometimes even late november to december (currently temp is 26-29
centigrades) and rarely goes minus 0 centigrades here so i am thinking to cover
it when the cold arrives.i will use copper fungicide as you say. do i also spay potted mangoes in the same way the ones in the ground (i have 4 in the ground and 8 potted in the balcony).

secondly do i start this spraying schedule asap?(one thing i dont know is that i am not aware if the nursery has sprayed them before i bought them 3 weeks ago)

thirdly does copper 40% + metalaxyl 15% fungicides work?