Department of Biological Sciences Faculty of Science University of Maroua Maroua Cameroon;
Department of Biological Sciences Faculty of Science University of Maroua Maroua Cameroon;
Department of Biological Sciences Faculty of Science University of Maroua Maroua Cameroon;
Department of Biological Sciences Faculty of Science University of Maroua Maroua Cameroon;
Amegilla calens; Gossypium hirsutum; Meskine; Pollination Efficiency; Yields;