Allan from Willow Springs Missouri writes
This will depend on what type(s) of fruit trees and which disease(s) you are targeting. For example, per the product label for Agrisel BioPhos Pro Systemic Fungicide: "NON-BEARING CITRUS AND NURSERIES: For control of citrus Alternaria leaf spot, make foliar applications at 1-2% v/v as new flush first appears and continue at 2-3 week intervals until the foliage is mature. Repeat the sequence with each additional growth flush. For Phytophthora root rot, make soil or foliar applications at 1-2% v/v or in water to wet the root zone or to run-off the foliage. For control of Phytophthora root rot make foliar applications at 1-2% v/v up to run-off. For soil applications apply 1-2 gallons per acre in water to wet the root zone or for containerized trees, use 1-2% v/v drench to wet the roots." Please be sure to review the product label for more information and complete application instructions.
Answer last updated on: 06/01/2021
