Impact of Two Organic Fertilizers (Mycorrhizae and Poultry Manure) Associated with Pollinators Insects on Growth and Yields of Sesamum Indicum L. at Baré (Littorale Region-Cameroon)

Field of sesame was conducted during the rainy season in 2021 and 2022 in Baré (Littorale Region - Cameroon) aiming to contribute to the improvement of the yield of sesame by combining two organic fertilizers and pollinators insects. The main factor was pollination with two levels (plants left on free pollination and plants isolated from insects). The secondary aspect was fertilization with two points mycorhize-poultry manure and control. The growth parameters, the diversity and foraging activity of pollinators insects, the influence of organic fertilizers and pollinator insects were evaluated on the yields. The results showed that the plants located on the plots treated with mycorhize-poultry showed significant growth on the number of the leaves (p<0.05), the collar diameter (p<0.05) and mean plant height (p<0.05). In both years, a total of four orders of pollinator insects have been identified where Hymenoptera (93.14%) ranks first followed by Diptera (8.71%). Those insects harvested intensively nectar (85.22%) and weakly pollen (10.05%). Mean number of seeds per capsule, the average mass per 100 seeds, the normal seeds left and the yield in dry of seeds per hecare on free pollination was greater compared to those isolated from insects (p<0.001). The production (the mean number of seeds per capsule, the average mass per 100 seeds, the normal seeds left and the yield in dry of seeds per hecare) were 22.73%, 48.00%, 30.51% and 1.02 ton in the plots having mycorhize-poultry manure associated with pollinators insect, 11.83%, 22.21%, 15.45% and 0.16 ton plots having to control respectively. The use of organic manure especially the mycorhize-poultry manure and the maintenance of pollinators insect nest around the field mays by recommended to improve crop yield.