Purple Mountain Ash pests and disease? - Ask Extension
Attached are pics of my tree. Initially lost sun-facing southern bark at base of tree.Last year and this year, strange curling of leaves.Any way to ...
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Purple Mountain Ash pests and disease? #255220
Asked June 18, 2015, 2:28 PM EDT
Attached are pics of my tree. Initially lost sun-facing southern bark at base of tree.
Last year and this year, strange curling of leaves.
Any way to cure this? Prevent this? Save the tree?
Last year and this year, strange curling of leaves.
Any way to cure this? Prevent this? Save the tree?
Jefferson County Colorado
Expert Response
The leaf curling is from the ash leaf curl aphid.
These insects proliferate on tender succulent tissue. There's plenty of that this year with all the rain we've had. Usually mid midsummer natural controls reduce the insect populations. Systemic insecticides have been the only effective treatment for the aphids.
The hole is the result of the lilac ash borer. Please see this fact sheet for more information on management:
http://www.ext.colostate.edu/pubs/insect/05614.html
The bark that came off the tree was probably the result of sunscald. From what I can see, the wound appears to be closing well. There is no action that you need to take at this time, including applying any wound dressing.Here's a fact sheethttp://www.ext.colostate.edu/pubs/garden/02932.html
that discusses management of sunscald.
Good luck!
These insects proliferate on tender succulent tissue. There's plenty of that this year with all the rain we've had. Usually mid midsummer natural controls reduce the insect populations. Systemic insecticides have been the only effective treatment for the aphids.
The hole is the result of the lilac ash borer. Please see this fact sheet for more information on management:
http://www.ext.colostate.edu/pubs/insect/05614.html
The bark that came off the tree was probably the result of sunscald. From what I can see, the wound appears to be closing well. There is no action that you need to take at this time, including applying any wound dressing.Here's a fact sheethttp://www.ext.colostate.edu/pubs/garden/02932.html
that discusses management of sunscald.
Good luck!
