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Sp661 Bacterial Leaf Scorch In Landscape Trees, The University Of Tennessee Agricultural Extension Service
Sp661 Bacterial Leaf Scorch In Landscape Trees, The University Of Tennessee Agricultural Extension Service
Forestry, Trees, and Timber
Bacterial leaf scorch is a chronic disease caused by a bacterium, Xylella fastidiosa, that grows in the xylem of the tree and physically clogs these water-conducting vessels. As the bacterium multiplies, water transport becomes more limited. The tree suffers water stress, especially in mid to late summer, resulting in leaf scorch; a browning or discoloration of the margins of the leaves with interior portions of the leaves near the veins remaining green. The bacterium is spread by leafhoppers, spittlebugs and other xylem-feeding insects.