Thanks Pugz and Zands. I do spray and tip, and use controlled pruning on the smaller trees which I had planted myself. I plan on keeping those as manageable as possible .
The larger and established trees were pruned by Wilma, with a Tri-annual major prune-back by me. Thing is, when I give them a harsh pruning, they skip a year or two of production....I used to spray micros, copper, etc on the large trees, but that was quite a job. The Big ones are on their own now, as it's just not worth the labor.
I give Sulfate of Potash to all the mango trees. I applied 100lbs of it last month