spary ashe tree? - Ask Extension
Should we Larimer County tree lovers be concerned with dangers of ash-tree blight?
Are preventive measures recommended at this time within Ft Collins ...
Knowledgebase
spary ashe tree? #357397
Asked August 28, 2016, 5:00 PM EDT
Should we Larimer County tree lovers be concerned with dangers of ash-tree blight?
Are preventive measures recommended at this time within Ft Collins city limits?
Do you continuously post updates/warnings/recommendations specifically regarding these trees? If so, what is website address?
Thank you for you help.
Larimer County Colorado
Expert Response
Hello,
We have a number of things potentially affecting ash trees in Larimer County and yes, it's always good for homeowners and citizens to be aware of what can affect the urban forest.
First, ash trees were damaged from the November 2014 "polar vortex". This cold snap essentially "froze" many trees in place. While we didn't see a lot of damage last year, we're seeing more damage to ash this year and will expect to see this for years to come. My co-worker, Curtis Utley, wrote a great blog about this: http://csuhort.blogspot.com/2016/07/a-lost-hope.html
The second thing affecting ash, which has been a problem for many years, is lilac-ash borer. This insect (the adult is a clear-wing moth) affects stressed trees. Those suffering from improper planting, poor pruning, drought stress, etc. This insect generally doesn't kill the tree and improving cultural practices is the best way to manage this insect. Here is more information: http://extension.colostate.edu/docs/pubs/insect/05614.pdf
Finally, emerald ash borer was confirmed in Boulder in 2013 and has moved to both Longmont and Gunbarrel. This insect has not been confirmed outside of Boulder County (and to date, has not been confirmed in Larimer County). The most up-to-date information on emerald ash borer can be found at www.eabcolorado.com
Preventative treatment for emerald ash borer is not being recommended at this time for residents within Fort Collins, but it is always the choice (and right) of the homeowner to make their own decisions. The foresters, the Department of Agriculture, tree care specialists, CSU and Extension staff are in constant communication regarding this insect. But the website I gave you (above) is the best to keep on top of the latest recommendations.
Please note that not all ash trees would be considered a candidate for treatment...trees in decline, smaller trees and those with poor structure may not be worthy to treat. Other options include removal or replanting with a plan to remove. Please let me know if you have other questions.
We have a number of things potentially affecting ash trees in Larimer County and yes, it's always good for homeowners and citizens to be aware of what can affect the urban forest.
First, ash trees were damaged from the November 2014 "polar vortex". This cold snap essentially "froze" many trees in place. While we didn't see a lot of damage last year, we're seeing more damage to ash this year and will expect to see this for years to come. My co-worker, Curtis Utley, wrote a great blog about this: http://csuhort.blogspot.com/2016/07/a-lost-hope.html
The second thing affecting ash, which has been a problem for many years, is lilac-ash borer. This insect (the adult is a clear-wing moth) affects stressed trees. Those suffering from improper planting, poor pruning, drought stress, etc. This insect generally doesn't kill the tree and improving cultural practices is the best way to manage this insect. Here is more information: http://extension.colostate.edu/docs/pubs/insect/05614.pdf
Finally, emerald ash borer was confirmed in Boulder in 2013 and has moved to both Longmont and Gunbarrel. This insect has not been confirmed outside of Boulder County (and to date, has not been confirmed in Larimer County). The most up-to-date information on emerald ash borer can be found at www.eabcolorado.com
Preventative treatment for emerald ash borer is not being recommended at this time for residents within Fort Collins, but it is always the choice (and right) of the homeowner to make their own decisions. The foresters, the Department of Agriculture, tree care specialists, CSU and Extension staff are in constant communication regarding this insect. But the website I gave you (above) is the best to keep on top of the latest recommendations.
Please note that not all ash trees would be considered a candidate for treatment...trees in decline, smaller trees and those with poor structure may not be worthy to treat. Other options include removal or replanting with a plan to remove. Please let me know if you have other questions.
