Plants Extracts and a Mycoinsecticide in Cowpea Yield Improvement in Guinean Savanah and Sahelian Savanah Agro-Ecological Zones of Cameroun

Cowpea yield improvement is done by adding agricultural inputs. The use of natural substances as pesticides being encouraged to fight against cowpea field pests. pesticidal potentials Azadirachta indica and Boswellia dalzielii water extracts, Metarhizium anisopliae, alone in combination with plant a commercial synthetic pesticide (Decis®) were tested on two varieties cowpeas, Vigna unguiculata agroecological zones (Guinean Savanah Sahelian Savanah) Cameroon. trials carried out full randomized block design including nine treatments control. Four replications made concerning the different At flowering stage, was sprayed three times formulations at interval five days. number ramifications per plant, that pods seed determined. considerably (p ®). Bafia variety treated M. anisopliae A. recorded highest ramification rate (37.03 ± 1.59) Maroua (Sahelian Savanah). same also produced more important (90.50 16.66) Ngaoundere binary plants used this experiment. (44.23 2.31) B125 separately (A. indica, B. dalzielii, anisopliae). products work, their mixtures could supersede considering environmental issue crop protection. Then, such would not only improve productivity but preserve environment from pollution due residual chemicals.