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I have never tried your proposed inflorescence-stumping technique.I customarily wait until pea-sized fruits develope, then break off the entire inflorescence at its base.
It might be a fertilizer burn....More likely it is Powdery Mildew or some other cool-weather fungus. Looks as though the infection has proceeded in about five episodes--- see the progression upwards, from the older grey, to black, dark brown, dark tan, and light tan.
Where are you guys finding Keystone 350DP or Biomaster online? Not driving halfway across the state for it. I am trying to find a good foliar fert that I can simply order and am not having any luck. Whats good on Amazon? Would a citrus tree foliar work for mango as well? Already spraying CMB blend on the blooms. Will Liquid Fish work just as well?
We have weevils here and the only thing that stops them is cold weather(which we have had plenty of 40s nights, but nothing cold enough to kill them) and systemic imidacloprid. I will use organic methods when its doable and cheap enough(like liquid fish) but overall, organic farming is incredibly inefficient. Organic farming on any larger scale is next to impossible in FL due to massive pest and disease pressure and generally poor soils. Oddly enough I haven't had an issue with mildew in the 6 or so yearsk I have grown mangoes. Maybe its the high iron and sulfur content in the ground water of my shallow well.
Where are you guys finding Keystone 350DP
We are in Florida and have zero pest and disease pressure....