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Title: Bacterial Leaf Scorch Affects New Jersey State Tree (Pest Alert)

Author: USDA Forest Service,; Northeastern Area, State and Private Forestry,;

Date: 2000

Source: NA-PR-01-00. Newtown Square, PA:U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry

Publication Series: Program Aid

Description: Recent surveys indicate that Bacterial Leaf Scorch (BLS) of northern red oak is widespread within New Jersey (see map) with many communities experiencing a high disease incidence. BLS is considered a threat not only to the state tree, northern red oak, but also to pin and scarlet oaks and other urban trees such as sycamore and elm. The disease in oaks has been observed from southern New York to Florida, and BLS has been estimated to occur in more than 50 percent of some landscape oak plantings. BLS is caused by the bacterium, Xylella fastidiosa, which colonizes and physically "clogs" the tree's water conducting tissues or xylem. Water transport becomes disrupted in roots, branches, and leaves due to large amounts of multiplying bacteria and their by-products. The presence of the bacteria may also trigger a reaction in the tree that plugs the xylem, further impeding water transport.

Keywords: NA-PR-01-00, Disease, decline, mortality, bacterial leaf scorch, leaf scorch, new jersey leaf scorch

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USDA Forest Service 2000. Bacterial Leaf Scorch Affects New Jersey State Tree (Pest Alert). NA-PR-01-00. Newtown Square, PA:U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry


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