Comparative effect of Cassia mimosoides L. (Fabaceae), Leucas aspera (Willd.) Link (Lamiaceae) and Sesbania pachycarpa DC. (Fabaceae) on Millet Yield [Pennisetum glaucum (L.) R. Br. (Poaceae)] in East-Southeast Niger

Weed control is one of the most important constraints to crop production. This study was undertaken in the south-east of Niger. The aim of the study was to assess the impact of weed control on millet production in this area. Experiments focused on the growth (height and tillering) and grain weight of millet plants subjected to competition from Cassia mimosoides L. (Fabaceae), Leucas aspera (Willd.) Link (Lamiaceae) and Sesbania pachycarpa DC. (Fabaceae). Results showed that Leucas aspera was the most aggressive species. Its nuisance threshold density was 2 plants/m² and its interference period was estimated at 14 days after sowing. Finally, the average percentage yield reduction was 98.34%.