The spruce bud midge, Rhahdophaga sivainei Felt (Clark 1952), occurs in Alberta, Yukon, Northwest Territories, and eastward. It mines the vegetative buds of Picea glauca and P. mariana causing multiple branching. This species, or a similar one, attacks young Picea sitchensis in coastal British Columbia.
”- Robert Furniss, Valentine Carolin: (1977) Western Forest Insects©
Reference: https://www.biodiversitylibrary.org/page/53573469#page/434/mode/1up