Cassidy, T.P., Romney, V.E, Buchanan, W.D., & York, G.T. 1950 Damage to guayule by insects and mites with notes on control.. Circular (United States Department of Agriculture) No. 842: 1-19.

Notes: Species mentioned include Orthezia sp., Rhizaspidiotus dearnessi, Puto yuccae and Phenacoccus gossypii.