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Hemlock Woolly Adelgid—Adelges tsugae
Hemlock woolly adelgid (HWA) is a serious pest of eastern hemlock. Feeding from HWA causes needles to discolor and drop prematurely. Tree death can occur within a few years from the first infestation. HWA is dispersed by wind, birds, mammals and can be moved on plants in the nursery trade.
A Hemlock Woolly Adelgid Quarantine was established to protect Maine's hemlocks. Despite the best efforts to prevent the spread of HWA in Maine, several towns are known to be infested (map). A quarantine remains in place to slow and prevent the spread of HWA into other parts of the state.
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[Photos, left to right: James Johnson, Georgia Forestry Commission, Bugwood.org; Connecticut Agricultural Experiment Station Archive, Connecticut Agricultural Experiment Station, Bugwood.org; Chris Evans, River to River CWMA, Bugwood.org]
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