**NEW PEST ALERT**
BY: Andrew Miller
Master Horticulturist | Designs by Sundown
History: The Crimson Spire Oak (Q. robur x Q. alba) is a prized tree in the Colorado Landscape. They are known for being hardy, drought tolerant, can withstand heavy winds, fast growing, mildew resistant, and limited insect pressures. Stem swelling galls were first noticed in Douglas County and images were sent to Colorado State University for identification. Samples were also sent to the USDA/Smithsonian for identification. Gall expert Miles Zhang, a postdoc with USDA, was able to ID the wasp to (Genus: Andricus).