Fire Blight is caused by Erwinia amylovora. Disease can usually be found in apple and pear trees on stems, blossoms and rootstock. Large seeping wounds are generally seen as sources of inoculum that spread to infect and damage blossoms, severely lowering fruit yields. AgriPhage Fire Blight should be sprayed as soon as temperatures exceed 70 degrees onto the tree surface as well as through the bloom cycle.
