First Author:   Yannick Djoumessi Université de Dschang djoumessi.yannick@gmail.com         http:// Second Author: Victor Afari-Sefa AVRDC - The World Vegetable Center victor.afari-sefa@worldveg.org         Third Author: Jean Claude Bidogeza Africa Risk Capacity bidogeza@yahoo.fr         http:// Fourth Author: Cyrille Kamdem University of Yaoundé II-Soa bergaly@yahoo.fr         http://