@ARTICLE {HERREN:1990a, title = {Biological control as the primary option in sustainable pest management: the cassava pest project}, author = {Herren, H. R. }, journal = {Bulletin de la societe entomologique suisse}, year = {1990}, volume = {63}, pages = {405--413}, issn = {0036-7575}, note = {RTB; Root and Tuber; Cassava}, }