A douglas fir on adjacent property has looked sickly for 25 years. It was sick when we moved in, and remained consistently so, rather than getting progressively worse. It finally blew down last winter. The newly exposed roots were mushy to squeeze, so there is expected root rot (possibly phellinus weirii??) Ten m away I have an otherwise healthy 35 m fir tree. Should I be considering taking it down, based on the proximity of possible phellinus weirii?
Either the remaining tree has a significant problem or it doesn't, what happened to the other tree won't tell you this. You must have a qualified party inspect it to find out.
Speculation really doesnt mean too much. If this is a concern for your trees you could submit a root sample to the Min. of Ag. plant sciences department in Abbotsford for the the cost of $16.50. The plant Pathologists there will email you a diagnosis report in 7 to 10 days.
you should determine whether the remaining tree has a disease issue, Jimweeds suggestion is valid. Medicating without diagnosis is pointless.
