@ARTICLE {MESFIN:1992, title = {Feeding behaviour of Aphids craccivora (Koch) on cowpea cultivars with different levels of aphid resistance}, author = {Mesfin, T. and Thottappilly, G. and Singh, S. R. }, journal = {Annals of applied Biology}, year = {1992}, volume = {121}, pages = {493--501}, }