Root damage and death from Phytopthora infection reduces nutrient availability throughout the tree. One consequence is nutrient deprivation in leaves.
Various mitigation techniques can be used, some improving conditions for the roots, some attempting to address the nutritional deficit at the leaves.
Phytopthora infection is almost inevitable, in my view.
— Laurie Meadows (@Laurie_Meadows) July 17, 2019
Fiddling round on home-scale approaches, I am trying a top-down approach in winter – foliar phosphoric acid, calcium nitrate +solubor sprays, micronut, MgSO4 sprays, now KSO4 (but need a soluble form). Leaves are re-greening pic.twitter.com/4wKfFTkoZd
Avocado Gene Expression, Climate, and Society