WIKWIO IDAO is a software to aid the identification and knowledge base of the main weeds of cash crops and food crops in the Western Indian Ocean countries. This application has been edited by CIRAD, IFP, FOFIFA, MCIA/MSIRI and CNDRS with the financial support of the European Programme "ACP Science and Technology II» 2012. The authors wish to thank all the national partners of the Wikwio project and members of the participatory portal