de Villiers, J.F. 1978 Citrus mussel scale Cornuaspis beckii (Newm.) (=Lepidosaphes beckii (Newm.). Citrus Pests in the Republic of South Africa [Science Bulletin, No. 391]. Department of Agricultural Technical Services, South Africa 253 pp.

Notes: [Paper presented at the Entomological Symposium, Pretoria 27 September to 1 October 1971; subsequently revised for publication.] Hosts, distribution, economic importance, life history, natural enemies and control are discussed.