Spruce bark beetles don’t just tolerate their host tree’s chemical defenses—they actively reshape them into stronger ...

How trees fare under drought depends heavily on their past experiences. In some cases, adversity breeds resilience: Spruce trees that experience long-term droughts are more resistant to future ...

The dwarf Alberta spruce is an evergreen conifer with a classic pyramidal Christmas tree shape. This spruce tree variety is related to trees that grow 100 feet or taller. The most popular landscape ...

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