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Meet: Eastern Hemlock


Nestled within the picturesque landscapes of of Michigan forests, a silent battle is being fought—one that threatens the existence of the majestic Eastern Hemlock trees. These towering evergreens, often overshadowing their surroundings, play a crucial role in the region's ecosystem. However, their quiet existence is now endangered by the invasion of the woolly adelgid, a nonnative insect originating from eastern Asia.


Unlike its native habitat where natural predators and climatic conditions manage the woolly adelgid's population, Michigan faces a different scenario. Here, the Eastern Hemlocks demand careful management to fend off this invasive threat and safeguard their continued existence.


These remarkable trees have a penchant for cool, sloping lands with acidic soils, often choosing bottom lands and riverbanks in the northern climates as their abode. Their resilience is awe-inspiring—some of these trees have stood tall for over five centuries, with records showing an astonishing 554-year-old Eastern Hemlock in Pennsylvania. In the past, their bark was utilized for leather tanning, while their wood found purpose in constructing railroad ties and serving as general lumber.


Distinguishing themselves among regular pines, Eastern Hemlocks display darker needles and gracefully drooping branches. They thrive in shaded environments and can reach staggering heights of over 100 feet, boasting a circumference exceeding five feet.


Sadly, the woolly adelgid infestation threatens the very existence of these majestic trees. But there's hope. If you chance upon an Eastern Hemlock and suspect an infestation, reporting it to the local Department of Natural Resources (DNR), a nearby nature center, or using designated websites can play a crucial role in combating this invasive pest. Experts can step in, develop treatment plans, and work tirelessly to save these cherished giants.

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