Fire blight treatment7/9/2023 Also select varieties that are grafted onto disease resistant rootstock, as are all of our trees. Select varieties that are resistant to fire blight, such as Seckel, Potomac and Warren pears, Hosui Asian pears, and Cox Orange Pippin apples. Good management begins before you even plant your trees. Keeping your trees healthy in the first place is the best solution when it comes to fire blight. This bacteria-laden liquid is then moved to other parts of the tree by insects, birds and other vectors, thus spreading the infection. In the spring, these cankers may ooze as the tree and the bacteria begin their new growth for the year. During the winter months, the bacteria in the canker will go into a state of dormancy along with the tree. These cankers are visible by their discoloration, often with red-brown streaking, and the edges of the canker may be blistered and raised. The bacteria lives inside the bark, festering in spots called cankers. These areas are easy to spot in the summer against the bright green of neighboring healthy growth. ![]() The dead leaves and fruit remain attached and can be brown or black. Affected branches often curl back in a “shepherd’s crook” or J-shape. Depending on the severity of the infection, leaves can be patchy with dead spots, or entire sections of new growth and even whole limbs can be killed off. Is Your Tree Infected?įire blight is named for the scorched appearance of infected leaves and branches. However, it can be kept under control using organic methods to prevent the disease from spreading and killing the tree. Once a tree is infected, it is nearly impossible to eliminate. It is caused by the bacteria Erwinia amylovora. Fire Blight Is A Common Disease For Roses, Pears and Applesįire blight is a common and potentially fatal disease among trees in the rose family, especially pears and apples.
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