Entwistle, P.F., Johnson, C.G., & Dunn, E. 1959 New pests of cocoa (Theobroma cacao L.) in Ghana following applications of insecticides.. Nature (London) 184(4704): 2040.

Notes: Pseudococcus njalensis, swollen shoot disease vector, has been a successful target for these insecticide experiments by decreasing the populations of its attendant ants. However, increases in other noxious insects have occurred.