@PHDTHESIS {DOUMTSOP:2021, title = {Bio-ecology and systematics of the scale insect Stictococcus vayssierei Richard, 1971 (Hemiptera: Stictococcidae), a major pest of root and tuber crops in the Nigero-Congolian forest block}, author = {Doumtsop, F. A. R. *}, year = {2021}, type = {Thesis submitted and publicly defended in fulfillment of the requirement for the award of a Doctorate/Ph.D degree in Biology of Animal Organisms}, school = {University of Yaounde I}, address = {Yaounde, Cameroon}, note = {RTB; IITA supervisors: Rachid HANNA, Komi FIABOE. Pdf can be access through KC staff Mgt. 189p.}, }