Andrés, L.A., & Davis, C.J. 1973 The biological control of weeds with insects in the United States.. Miscellaneous Publication (Commonwealth Institute of Biological Control) No. 6: 11-28.

Notes: [Proceedings of the Second International Symposium on Biological Control of Weeds, Paul H. Dunn (Ed.), 4-7 October 1971, Rome, Italy.] This discussion briefly traces the development of the biological control of weeds in the United States, both in the Hawaiian Islands and on the mainland, as well as reviews several current weed projects. Dactylopius confusus is listed in a table as control agent for Opuntia spp.