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Fire blight pear7/11/2023 ![]() Selecting fireblight resistant varieties of apples, pears, and crabapples is a good way to minimize the chances of fireblight infection.įor more information, see the following Colorado State University Extension fact sheet(s). Copper sulfate can be used before leaves form in early spring. Prune twigs and branches 8 to 12 inches below visible infection.Ĭhemical control of fireblight is an option, but it’s not always effective. Dip tools in household bleach or ethyl alcohol or use household spray disinfectants. If pruning during the growing season, when the disease is active, it is extremely important to sanitize pruning tools BETWEEN EACH AND EVERY CUT. ![]() ![]() It typically infects the blossoms of the tree, and various treatments may be applied at this time before any fruit is developed. Prune fireblighted trees as soon as symptoms develop in the spring and early summer. Fire blight is a serious bacterial disease of apples and pears across the U.S. Fruit: large skin yellow with bright red blush flesh white, juicy, flavor excellent ripens 6 to 7 days before Bartlett. Manage fireblight by pruning diseased parts of the tree. Originated in Florence, Italy, by Alessandro Morettini. Leaves turn yellow, then brown and finally black but remain on the branch. This publication explains fire blight symptoms and causes, as well as recommended control measures. More commonly, trees with fireblight develop curling, bending and blackening shoots, called shepherd’s crooking. One of the most destructive diseases of commercial apple and pear trees, fire blight is also a serious disease of Bradford pear trees used in many Texas landscapes.
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