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Column: How Trees Protect Themselves from Wounds, Disease and Pests (Including Us)

from North Country Public Radio, July 25, 2020

Column: How Trees Protect Themselves from Wounds, Disease and Pests (Including Us) North Country Public Radio, July 25, 2020 Paul Hetzler writes, "We have long known how, just as our skin keeps harmful bacteria on our outsides, bark acts as a shield against tree pathogens. Since they don't have the luxury of mobility to avoid hazards, trees need thicker 'skin' than we do. Layers of living and non-living tissues protect tree trunks, roots and branches from mechanical injury, drying out, as well as from diseases. But when something breaches this first line of defense — tears through the bark — what happens inside the wood is fascinating." READ MORE

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