Douglas Fir Trees Have Two Trunks

Question From: F. Ziegelmuller - Webster, New York, United States
Q: I have some Douglas fir trees that have two trunks. Should I sheared off one of them? They are over 6 ft, perhaps 10 ft. One does not see much sun and one half the branches appear dead. Should I spray the tree? Just wonder if there are spider mites or other problem.

A: You need the advice of a certified arborist, a trained tree doctor. . To find one in your area go to and enter your zip code. Best Nancy