Treherne, R.C. 1916a Some orchard insects of economic importance in British Columbia.. Proceedings of the Entomological Society of British Columbia 9: 66-83.
Notes: Among the species reviewed is Quadraspidiotus perniciosus.
Treherne, R.C. 1916a Some orchard insects of economic importance in British Columbia.. Proceedings of the Entomological Society of British Columbia 9: 66-83.
Notes: Among the species reviewed is Quadraspidiotus perniciosus.