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portions of the leaf to die. In many cases,severe infections will cause tree death, <br /> though individual susceptibility to the disease varies. The fungus can overwinter on <br /> leaf petioles that remain attached to trees and is primarily spread by rain droplets <br /> moving spores throughout the tree. Early results suggest that inoculation of trees <br /> with fungicide may help slow or stop the spread of the disease within individual <br /> trees.At Houlton, monitoring existing oaks for symptoms will be an important first <br /> step; moreover, if oaks are planted in the future, it may be beneficial to avoid <br /> planting the variety Q. macrocarpa var. oliviformis,which has shown the most severe <br /> susceptibility to BOB. <br /> Friends of the Mississippi River Bailey Point Nature Preserve NRMP <br /> 68 <br />