Hassan, E., & Summers, R.G. 1997 Testing the toxicity effects on California red scale parasitoid (Aphytis lingnanensis Compere) of two insecticides used to control California red scale (Aonidiella aurantii Mask.) on citrus in the laboratory.. Zeitschrift für Pflanzenkrankheiten und Pflanzenschutz 104: 415-418.

Notes: A standard laboratory method was applied to assess the effect of dry insecticide residues of methomyl and methidathion on Aphytis lingnanensis (a parasitoid of Aonidiella aurantii). Methomyl at 0.005% per litre was less toxic than at 0.05% per litre, and less toxic than methidathion at 0.005 and 0.05% per litre.