Olivia writes
You can use Fungo-onil Multi Purpose Fungicide Concentrate on ornamental crabapple trees at a rate of 2 ¼ teaspoons per gallon of water, or 3 Tbs (1.5 oz) per 4 gallons of water. Apply enough diluted spray per acre to provide thorough coverage of all plant parts that are intended to be protected from disease. Repeat applications at 7 to 14 day intervals until conditions are no longer favorable for disease. Please refer to the product label for complete instructions.
Answer last updated on: 05/18/2018