Gary Chastagner, a Washington State University professor called “Dr. Christmas Tree,” shows Trojan and other fir seedlings at the school’s Puyallup Research and Extension Center on Nov. 30, 2023, in […]Read More
The tussock moth caterpillar is quite the sight, if you’ve ever seen one hanging around a Douglas fir tree. These hungry caterpillars can eat Douglas fir and grand fir needles, first starting with the new needles that grow as the caterpillars hatch. Later, munching on older needles high in the treetops.Read More
