Found out. a friends dad has a 150 yrs. old oak tree,with hive, at least 8yrs old,tree was close to his house,he thought tree looked weak,told me about bees 4 weeks ago,said i would look at ASAP,today had a certified n.c. arborist. ?, look at said tree charged him $900.00 to trim and spray for some kind of beatles,have tried to call tree doc to find out, Q. being do tree doc understand ? ?