An evergreen blight
I have a row of cedar trees that were planted around 25 years ago. For the first time ever, they are exhibiting a large amount of brown needles. They almost look like they are "sunburned." I also have a spruce tree around the same age that is dropping needles. I am concerned about an evergreen blight. Should I be worried?
Harford County Maryland
We would like to have more information. Please send us photos so we can see what you are dealing with. Send photos of the whole tree and affected branches. What type of cedar tree are you referring to? Many Leyland cypress are showing symptoms of winter damage - browning, etc.
Spruce - what type of spruce are you referring to? Blue spruce are susceptible to several fungal diseases such as rhisosphaeria needle cast and cytospora canker. However, management is the same. We recommend keeping the trees well watered during dry periods if possible. Mulch around trees to prevent wounding by lawn mowers and string trimmers. Make sure mulch is no thicker than several inches and keep away from the base of the trunk. Prune dead wood during dry weather. No chemical controls are recommended. See our website for information on each http://extension.umd.edu/hgic/evergreen-needle-cast-diseases-trees-and-shrubs