Gibson, A., & Ross, W.A. 1922 Insects affecting greenhouse plants.. Bulletin (Dominion of Canada, Department of Agriculture) No. 7: 1-36.

Notes: Species mentioned include Coccus hesperidum, Saissetia hemisphericae, Aspidiotus hederae, Chrysomphalus aonidum, Hemichionaspis aspidistrae, Pseudococcus citri, P. longispinus and Orthezia insignis; brief descriptions; hosts; chemical controls.