Nlend Alain Nicaise

Departement of agriculrure, livestock and by products, Higher institute of the sahel, University of Maroua, P. O. Box 46 Maroua, Cameroon

Kosma Philippe

Departement of agriculrure, livestock and by products, Higher institute of the sahel, University of Maroua, P. O. Box 46 Maroua, Cameroon

Tabe Taku Robert

Phytosanitary Unit, Departement of Agriculture, SOCAPALM Mbongo, Cameroon

Tamfuh Eric

Phytosanitary Unit, Departement of Agriculture, SOCAPALM Mbongo, Cameroon

Ntsomboh Ntsefong Godswill

Institute of Agrigultural Research for Development (IRAD), Phytopathology Unit, Specialized Centre for Oil Palm Research (CEREPAH) of La Dibamba. B.P. 243 Douala, Cameroon