@ARTICLE {ROBERTS:1993, title = {Interaction between two synthetic pyrethroids and the spread of two nonpersistent viruses in cowpea}, author = {Roberts, J. M. F. and Hodgson, C. J. and Jackai, L. and Thottappilly, G. and Singh, S. R. }, journal = {Annals of Applied Biology}, year = {1993}, volume = {122}, pages = {57--67}, }