That's how challenging it can be for scientists to distinguish the tiny powdery pollen grains produced by fir, spruce and pine trees. But a new artificial ...

The AFC release also said brown spot needle blight can stunt tree growth and increase the risk of pests like bark beetles. “Just in the last few days, the agency started receiving calls ...

The Pine Barrens sit between Philadelphia to the west and the Atlantic coast to the east. In the region with quick-draining sandy soil and trees with still-developing leaves, humidity remains low ...