Abstract
Field studies were conducted in 1975–76 to determine the effect of methidathion with and without chlorobenzilate on the resurgence of populations of Phyllocoptruta oleivora (Ashmead) and the survival of their natural enemies. Egg and adult populations of citrus rust mite increased significantly on leaves and fruit within 3–7 weeks after application of methidathion and methidathion-chlorobenzilate as compared to chlorobenzilate alone. Number of fruit with citrus rust mite injury was significantly higher in treatments containing methidathion. The fungal pathogen, Hirsutella thompsonii Fisher, was less prevalent in cadavers found in pesticide treatments as compared to the control.

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