Sailer, R.I. 1981 Elements of opportunity in biological control.. Beltsville Symposia in Agricultural Research. 5. Biological control in crop production. Allanheld, Osmun & Co. Totowa, N.J. 461 pp.

Notes: [Papers presented at an annual symposium organized by BARC Symposium V Committee; sponsored by and held at Beltsville Agricultural Research Center, MD, May 18-21, 1980.] Failure to recognize what had been known as Aphytis lingnanensis Compere to be actually a complex of almost identical sibling species delayed the discovery and use of Aphytis holoxanthus DeBach as a highly effective enemy of Florida red scale (Chrysomphalus aonidum L.) for many years.