Campbell, C.A.M. 1994 The influence of overhead shade and fertilizers on the Homoptera of mature Upper-Amazon cocoa trees in Ghana.. Bulletin of Entomological Research 74: 163-174.

Notes: Species mentioned include Planococcoides njalensis, Planococcus citri, Phenacoccus hargreavesi, Pseudococcus concavocerarii, P. longispinus, P. calceolariae, Maconellicoccus ugandae, Steatococcus sp., Gascardia sp. nr. G. zonata, Cribrolecanium andersoni and Stictococcus sjostedti.