Abstract
The authors give a list of the natural enemies of the San José scale, Quadraspidiotus perniciosus (Comstock) found at Wakayama Prefecture, southwest Japan in 1968-1969. These comprised as predators Chilocorus kuwanae Silvestri, Lasius niger Linné and Clania minuscula Butler and the Hymenopterus parasites Aspidiotiphagus citrinus Craw, Prospaltera sp., Aphytis sp. and Physcus sp.. The most important were Chilocorus kuwanae and Aspidiotiphagus citrinus, and the other species encounted were rare on Quadraspidiotus perniciosus in the citrus orchard. Aspidiotiphagus citrinus was attacked by the hyperparasite Marietta carnesi Howard and Chilocorus kuwanae by Homalotylus flaminius Dalman. Notes are given on their seasonal occurrence, relative abundance and stage attacked.
