Havron, A., & Rosen, D. 1994 Selection for organophosphorus pesticide resistance in two species of Aphytis.. Advances in the Study of Aphytis (Hymenoptera: Aphelinidae). Intercept Andover, U.K. 362 pp.

Notes: Aphytis holoxanthus, a parasite of the Florida red scale (Chrysomphalus aonidum), and A. lingnanensis, a parasite of the California red scale (Aonidiella aurantii), were chosen for these projects and shown to be at least moderately resistant to azinphosmethyl.