A study was conducted from December 2020 to July 2021 in the application and research farm of the University of Dschang to test the efficiency of two botanical insecticide extracts on FAW (Fall Army Worm). The randomized complete block design with three replications and two maize varieties Panar 53 (white) and Panar 12 (yellow), was used. The treatments (control; Emamectin benzoate 10g / sprayer; 1.5l Chromolaena odorata / sprayer; 1l C. odorata / sprayer; 1.5l Pteridium aquilinum/sprayer) were tested. FAW and other pests encountered were counted weekly until flowering. FAW has been present as well as grasshoppers and leafhoppers and the natural enemies of FAW (ants, spider and ladybug). Leafhoppers transmit viruses to maize in the dry season. The dry season registered the highest average leaf infestation rate (24.39±0.55%) than the rainy season (2.10±0.20%) only on yellow maize. Caterpillars were observed more during the dry season than the rainy season. The peak of FAW infestation reached on the 34th day after planting in both seasons. The control plots were most infested (0.46±0.07; 37.48±1.47%) than the treated one. Chromolaena 1l and Pteridium 1.5l plots were less infested with the lowest FAW (0.34±0.15; 0.15±0.09) and lowest average leaf infestation (18.26±1.02%; 22.63±1.13%). The yields obtained in the rainy season (5.58±0.18t/ha) were higher than in the dry season (4.34±0.20t/ha) on Pannar 12. Chromolaena 1l and Pteridium presented the best yields compared to control in both seasons. In summary, Chromolaena 1l and Pteridium are botanical insecticides substitutes for Emamectin benzoate during the high FAW infestations.
