I have several evergreen trees in 3 clusters. This cluster of 5 trees...3 of...

Asked December 12, 2015, 10:28 PM EST

I have several evergreen trees in 3 clusters. This cluster of 5 trees...3 of them are showing this rust color on the leaves and branches. I can only send you 1 picture I do have more if you would like to see. Please let me know what is happening to my trees. Thank you.

Dakota County Minnesota evergreens needle loss needle drop

2 Responses

The evergreens look to be experiencing normal needle drop that is part of a three year cycle. Needle drop peaks every three years making it much more noticeable.
http://byf.unl.edu/natural-needle-drop
http://learningstore.uwex.edu/assets/pdfs/A2614.pdf

Another possibility is needlecast disease. The information on the following fact sheet explains what to look for on the needles and how to diagnose the disease. http://www.na.fs.fed.us/spfo/pubs/howtos/ht_bfir/ht_bfir.htm