Asked June 17, 2021, 6:15 PM EDT
I have two Austrian Pines in my backyard. Over the past two springs, many of the same pine tree (throughout the neighborhood) needles have been turning brown. These brown needles are mostly at the top of the trees but still other areas have been impacted as well. In the spring of 2020, the area in and around Parker had a huge temperature swing (loss of 60-70 degrees within hours) and many of our Ash trees and Austrian Pines took a beating.
Looking at the affected needles and reading articles, I am thinking the pines may have Dothistroma needle blight. If this is the case, what can I do to save the trees?
Also, my Ash tree only grew leaves on one section of the tree the past two years. Again, the temperature drop I spoke of affected numerous Ash trees in my neighborhood. What needs to be done with my Ash tree?
Douglas County Colorado