Been seeing a lot of Monterey pine trees (Pinus radiata) around town that are browning up starting from the tops down.
It is my professional opinion as a Certified Arborist with the ISA that this is due to 3 reasons.
- Fusarium subglutinans is a fungus that can be carried by wind or native insects.
- Monterey pine bark beetle or Ips bark beetle can chemically find stressed trees and attack them by boring into the base of pine tree. You can literally see the bore dust at site of entry (look at base of tree)
- Persistent drought in California.
If you have a pine tree that is in need of assessment please let me know!
– Your friendly neighborhood tree guy