Carman, G.E., Elmer, H.S., & Ewart, W.H. 1954 Information concerning malathion for the control of California red scale, purple scale, black scale and soft scale on citrus in California.. News Letter (University of California, Citrus Experiment Station) No. 64: 11 pp.

Notes: Target species for chemical control are Aonidiella aurantii, A. citrina, Coccus hesperidum, C. pseudomagnoliarum and Lepidosaphes beckii.