Spores are released from these structures and spread to nearby trees by rain. If you look closely, these fruiting bodies (pycnidia) are large enough to be seen with the naked eye. Later, small, black fungal fruiting bodies, which contain spores, develop on the diseased needles. Initially, you may not see any fruiting bodies. Interior needles turn tan to brown usually in the lower portion of the tree, but remain attached. Symptoms of this disease become noticeable during late summer and fall. More recently, this fungus is being detected on white fir with needlecast symptoms growing in Michigan. A disease note published in 1997 documented it in Pennsylvania, and a more extensive paper published in 1989 documented it in Ontario (balsam fir) and Wisconsin (Concolor fir). ![]() Phyllosticta has been documented on white and balsam firs and is associated with needle blight symptoms. The fungal pathogen Phyllosticta is causing the interior needles of Concolor fir to turn brown in landscapes and Christmas tree fields. The following is from the Michigan State University Extension: For best results plant on a well drained soil. This species needs a lot of sun and air circulation. The roots become too saturated and die back occurs and have seen 20 ft tall tree blow over and the root system is very small being only 3 ft across. When planted on level ground that is not well drained problems occur on wet years. ![]() I hope it helps you to understand what's happening with your Concolor Fir. ![]() Treatment options are also provided along with cautions about chemical usage. The following is information about this species and the possible problems it can encounter. This is a beautiful tree and certainly worth having in your landscape given enough room - they can grow to 100 feet tall and 25 feet wide.
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