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