Keywords
Glycine max
flower
visit
nectar
pollination
How to Cite
Abstract
To assess the impact of Apis mellifera adansonii on pod and seed yields of Glycine max, its foraging and pollinating activities were studied in Maroua, during the two season seasons (August-September 2010 and 2011). Observations were made on 51 to 17866 flowers per treatment. Treatment 1 represented by free flowers; treatment 2 bagged flowers and treatment 3 flowers visited only by A. m. adansonii. In addition, all flower visitors were recorded. The abundance of bee, duration of visits, impact of activity of A. m. adansonii on fruiting percentage, the influence of this bee on formation of pods, number of seeds in each pods and average of normal seeds (well developed) were recorded. Individuals from 28 species of insects were recorded on the flowers of G. max, after two years of observations. Apis mellifera adansonii with 23.18% of 954 visits was the most frequent, followed by Polyrachis sp. 1 (14.77%), Macronomia vulpina (14.22%), Lipotriches collaris (11.07%). This honey bee intensely and exclusively foraged for nectar. The mean foraging speed was 12.56 ± 5.79 flowers per minute. Flowers visited by insects had higher fruiting rate compared with the others while those bagged had the lowest. Apis mellifera adansonii foraging resulted to a significant increment in fruiting rate by 14.14 and 11.98%, as well as the number of seeds per pod by 36.95 and 35.65%, and the percentage of normal seeds by 32.61 and 29.26% respectively in 2010 and 2011. The installation of A. m. adansonii colonies in G. max plantations is recommended to improve pod and seeds production of this species.
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