@ARTICLE {HERREN:1982e, title = {Distribution and economic importance of P.manihoti and Mononychellus ssp. in Africa}, author = {Herren, H. R. }, journal = {Paper presented at International Workshop on Biological Control and Host Plant Resistance to Control the Cassava Mealybug and GreenSpider}, year = {1982}, note = {Mite in Africa 6-10 December 1982. IITA, Ibadan}, }