Many virus diseases of plants and probably all diseases caused by mycoplasma-like organisms (MLOs) are transmitted by insect vectors. In this review the vector insect groups of viruses and MLOs on tropical food legumes are discussed. An overview is given quoting examples of the relations between the vector and the virus or MLO.

Farming systems research (FSR) at Gandajika, Zaire, is conducted by the national Legume Program (Programme National Legumineuses-PNL), which is part of the Applied Research and Extension Project (Projet de Recherche Agronomique Appliquee et Vulgarisation-RAV) of the department of Agriculture of Zaïre. RAV has a mandate for crop improvement. FSR and extension in cassava, maize and four grain legume crops.