Valles, E. 1965 [Aspects of biological control in general and in the special case of the coconut cochineal (Aspidiotus destructor Sign.)]. Jornadas Silvo-Agronómicas (Angola) 2: 259-279.

Notes: The theory of biological equilibrium is discussed during which various pest species are considered along with their natural enemies, including Icerya purchasi, Pseudococcus filamentosus, Dactylopius ceylonicus, D. coccus and D. opuntiae. The occurrence and impact of Aspidiotus destructor is compared in two locations: Principe and Libongos, along with its natural enemies.