author(s)
Ngatanko Iliassa, Ngamo Tinkeu Léonard, Ayiki Evelé Nathaniel, Ngassoum Martin Bénoît, Mapongmetsem Pierre Marie and Goudoum Augustin

abstract
Study was conductedto inventory pesticidal plants used by smallholders to avoid attack of insect’s stored products at northern Cameroon. Then, to evaluate the effectiveness of three most reported against maize weevil. To this end, a survey was conducted and samples of plants were collected and identified. Granaries were setting up and a dose 1% w/w powder of each plant was mixed to maize. It was recorded that plants listed by producers belong to 16 families. Lippia rugosa (L) (Verbenaceae) reduces significantly the impact of S. zeamais on maize stored in granary compared to Hyptis spicigera (Lamiaceae) (X² = 1263.98, P<0.01) and Xylopia aethiopica (Annonaceae) (X² = 146.35; p<0.01).These results highlight that L. rugosa and X. aethiopica keep their efficiency even in an open storage device like the granary. They can be used as alternative method to reduce application of chemical products on stored maize.