Megachile spp
Phaseolus vulgaris
Muo Kasina, Manfred Kraemer, Christopher Martius & Dieter Wittmann (2009) Diversity and activity density of bees visiting crop flowers in Kakamega, Western Kenya, Journal of Apicultural Research, 48:2, 134-139, DOI: 10.3896/IBRA.1.48.2.13