Iowa State University

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Freeze injury on trees   
Bob Hartzler

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May 9, 2005

(Left) Newly emerged Douglas fir needles killed by
freezing temperatures. Notice the older first year
needles were not damaged.









Green ash damaged by cold temperatures. Margins of
leaflets rapidly become necrotic and some
leaflets and leaves fall.






Prepared by Bob Hartzler, extension weed management specialist, Department of Agronomy, Iowa State University

For more information contact:
ISU Extension Agronomy
2104 Agronomy Hall
Ames, Iowa 50011-1010
Voice: (515) 294-1923
Fax: (515) 294-9985
Submit questions or comments here.  

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Common chemical and trade names are used in this publication. The use of trade names is for clarity by the reader. Inclusion of a trade name does not imply endorsement of that particular brand of herbicide and exclusion does not imply nonapproval.