Leaf spot on ~18-year-old aspen - Ask Extension
1.5" tree planted in irrigated suburban lawn in 2003, low foot-traffic area next to driveway, Arapahoe/Quebec area, approximately 5600' elevation.Litt...
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Leaf spot on ~18-year-old aspen #465605
Asked June 26, 2018, 3:04 PM EDT
1.5" tree planted in irrigated suburban lawn in 2003, low foot-traffic area next to driveway, Arapahoe/Quebec area, approximately 5600' elevation.
Little galls started appearing ~5 years ago, I thought it was insects. Last year, leaf spot started, causing leaf drop, and again this year. I now think it is a fungus. Is there a foliar or systemic treatment I can use this season? What should I do next year, other than clean up leaves? Is there a soil/systemic treatment that can be used?
Thanks.
Little galls started appearing ~5 years ago, I thought it was insects. Last year, leaf spot started, causing leaf drop, and again this year. I now think it is a fungus. Is there a foliar or systemic treatment I can use this season? What should I do next year, other than clean up leaves? Is there a soil/systemic treatment that can be used?
Thanks.
Arapahoe County Colorado
Expert Response
There is a reference form that may answer your questions regarding diseases of aspens and their treatment. The reference form can be found at http://extension.colostate.edu/docs/pubs/garden/02920.pdf. Please let me know if you can't locate the form or if you have further questions.
Thank you. That publication says:
"Check with your Colorado State University Extension county office or Colorado State Forest Service district forester for specific fungicide recommendations."
Do you have any recommendations?
"Check with your Colorado State University Extension county office or Colorado State Forest Service district forester for specific fungicide recommendations."
Do you have any recommendations?
I'll see if we have a handout on fungicides and get back to you as soon as possible.
Plant Talk Number 1403 references Daconil 2787. If you put in Colorado Extension Plant Talk into your server, it will give you access to that information and you can look for Number 1403. Hopefully, that helps.
Thanks!
