To evaluate the impact of single visit of Lipotriches collaris on pod and seed yields of Phaseolus vulgaris (red and small seeds), its foraging and pollinating activities were studied in Maroua, during 2010, 2011 and 2013 cropping seasons. Treatments included bagged flowers to avoid all visits and bagged flowers limited on a single visit of L. collaris. Observations were made on 147, 139 and 138 flowers in 2010, 2011 and 2013 respectively. The foraging behavior on flowers and its pollination efficiency (fruiting rate, number of seeds/pod and percentage of normal seeds) were recorded. Lipotriches collaris foraged pollen and nectar. The foraging activities of L. collaris increase the fruiting rate by 39.49 % and the number of seeds/pod by 14.65 %. Conservation of L. collaris nest close to P. vulgaris crop fields should be recommended to improve pod and seed production in the region.
Key words: Lipotriches collaris, Phaseolus vulgaris, pollen, nectar, pollination.
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