Voelcker, O.J. 1947 . Annual Report (West African Cacao Research Institute). Crown Agents for the Colonies London 71 pp.
Notes: Scales species mentioned include Pseudococcus njalensis, Pseudococcus citri and Ferrisia virgata.
Voelcker, O.J. 1947 . Annual Report (West African Cacao Research Institute). Crown Agents for the Colonies London 71 pp.
Notes: Scales species mentioned include Pseudococcus njalensis, Pseudococcus citri and Ferrisia virgata.