Trees in several parts of Washington State are just now showing the damage caused by a stress reaction to dry conditions last summer and this spring. DNR has received many calls from the public in recent weeks about trees whose leaves or needles are turning red or, even, dying.
Glenn Kohler, a DNR forest entomologist, has been investigating and says that Douglas-fir trees between 5 and 15 years old appear to be the ones most affected, but some larger trees are showing symptoms, too. Symptoms include entirely red crowns, red tops and red branches, he says.
“In a typical year, this type of damage may have many causes, but this year it is primarily the result of an extended period with little to no rain during August and September 2012 and a drier-than-normal spring in 2013.”
Read entire article: Ear To Ground