Importance relative des mauvaises herbes de la culture du maïs dans le département de M'Bahiakro/[Relative importance of weeds in maize cultivation in the M'Bahiakro department]

The study of weed fields of corn M'Bahiakro department in Iffou region of Côte d' Ivoire, is based on 127 floristic surveys in the two agro-ecosystems (forest, savannah). It aims to describe the overall character of the weed flora and botanical attributes, biological, and Phytosociological phytoecological of 299 species recorded. These species belong to 55 families whose predominant genera and species are Poaceae, Asteraceae, Fabaceae, Euphorbiaceae and Rubiaceae. The biological type of each identified species has built the biological spectrum characteristic of each vegetation as well as the M'Bahiakro department (synthetic spectrum). The agronomically important species is analyzed based on their relative frequency and abundance -dominance. The projection of cash on a diagram of infestation allowed to differentiate five species groups.