Scale insects (Ilomoptera: Goccoidca) on coffee in Papua New Guinea

Abstract

The spread of some injurious scale insects on coffee in Papua New Guinea (P.N.G.) has coincided with an increase in coffee cultivation. Loss of yield caused mainly by the green scales Coccus celatus De Lotto and Coccus viridis (Green), has stimulated interest in biological control. As a result of recent surveys to assess the extent of green scales, a list is presented of all scale insects on coffee in P.N.G.