Noticeable galls may be seen on new needles starting in June (fig. 184). Galls of C. pseudotsugae are swollen on the lower surface and colored on both surfaces with yellow, pink, or purple. [photos on pg. 114]
”- Hagle, S.K.; Gibson, K.E.; and Tunnock, S: (2003 (with slight rev. 2013)) Field guide to diseases and insect pests of northern and central Rocky Mountain conifers. Report No. R1-03-08©