The investigations were carried out from September 10 through October 13, 2017 at Tchabbal-Mounguel. On Gossypium hirsutum flowers, investigations were done on many aspects of the pollination services of Amegilla calens and Apis mellifera. G. hirsutum flowers were observed to study the activity of A. calens and A. mellifera and to evaluate their impacts on fruits and seed yields of this Malvaceae. The treatments consisted of 120 flowers left for free pollination, 120 flowers protected from insects using gauze bag nets, 200 protected flowers and visited exclusively by A. calens and A. mellifera and 100 protected flowers then opened and closed without any visit of insects or any other organisms. The results show that on cotton flowers, foragers of A. calens and A. mellifera highly collect nectar and pollen on its flowers. The highest mean number of individuals simultaneously active per 1000 flowers is 587 for A. calens and 526 for A. mellifera. Through their pollinating efficiency, A. calens and A. mellifera caused a significant increase in the fruiting rate by 7.00% and 17.33%, the number of seeds per fruit by 44.20% and 18.32% and the normal seeds by 47.78% and 5.66% respectively. Therefore, the conservation of the nests of A. calens and colonies of A. mellifera around G. hirsutum plantations are to be recommended to improve the fruit and seed yields of this Malvaceae.
References
[1]
Velázquez-López, R., Wegier, A., Alavez, V., Pérez-López, J., Vázquez-Barrios, V., Arroyo-Lambaer, D., Ponce-Mendoza, A. and Kunin, W.E. (2018) The Mating System of the Wild-to-Domesticated Complex of Gossypium hirsutum L. Is Mixed. Frontiers in Plant Science, 9, 574. https://doi.org/10.3389/fpls.2018.00574
[2]
Mazi, S. (2018) Pollination Services of Two Bee Species on Crops in Cameroon. Editions Universitaires Europeenne.
[3]
Brubaker, C.L. and Wendel, J.F. (1994) Reevaluating the Origin of Domesticated Cotton (Gossypium hirsutum; Malvaceae) Using Nuclear Restriction Fragment Length Polymorphisms (RFLPs). American Journal of Botany, 81, 1309-1326. https://doi.org/10.1002/j.1537-2197.1994.tb11453.x
[4]
Smith, C.W. and Cothren, J.T. (1999) Cotton Origin, History, Technology, and Production. John Wiley & Sons, New York.
[5]
Wäckers, F.L. and Bonifay, C. (2004) How to Be Sweet? Extrafloral Nectar Allocation by Gossypium hirsutum Fits Optimal Defense Theory Predictions. Ecology, 85, 1512-1518. https://doi.org/10.1890/03-0422
[6]
Kolreuter, J.G. (1761) Contribution to Biology. The University of Chicago Press, Chicago.
[7]
Garibaldi, L.A., Steffan-Dewenter, I., Winfree, R., Aizen, M.A., Bommarco, R., Cunningham, A.S., Kremen, C., Carvalheiro, L.G., Harder, L.D., Afik, O., Bartomeus, I., Benjamin, F., Boreux, V., Cariveau, D., Chacoff, N.P., Dudenhöffer, J.H., Freitas, B.M., Ghazoul, J., Greenleaf, S., Hipólito, J., Holzschuh, A., Howlett, B., Isaacs, R., Javorek, S. K., Kennedy, C.M., Krewenka, K., Krishnan, S., Mandelik, Y., Mayfield, M.M., Motzke, I., Munyuli, T., Nault, B.A., Otieno, M., Petersen, J., Pisanty, G., Potts, S.G., Rader, R., Ricketts, T.A., Rundlöf, M., Seymour, C.L., Schüepp, C., Szentgyörgyi, H., Taki, H., Tscharntke, T., Vergara, C.H., Viana, B.F., Wanger, T.C., Westphal, C., Williams, N. and Klein, A.M. (2013) Wild Pollinators Enhance Fruit Set of Crops Regardless of Honey Bee Abundance. Science, 33, 1608-1611. https://doi.org/10.1126/science.1230200
[8]
Potts, S.G., Imperatriz-Fonseca, V., Ngo, H.T., Aizen, M.A., Biesmeijer, J.C., Breeze, T.D., Dicks, L.V., Lucas, A., Garibaldi, L.A., Hill, R., Settele, J. and Vanbergen, A.J. (2016) Safeguarding Pollinators and Their Values to Human Well-Being. Nature, 540, 220-229.
[9]
Requier, F., Garnery, L., Kohl, P.L., Njovu, H.K., Pirk, C.W.W., Crewe, R. and Dewenter, S.I. (2019) The Conservation of Native Honey Bees Is Crucial. Trend in Ecology and Evolution, 34, 789-798.
[10]
Wei, W., Wu, H.P., Li, X.Y., Wei, X., Lu, W. and Zheng, X.L. (2019) Diversity, Daily Activity Patterns, and Pollination Effectiveness of the Insects Visiting Camellia osmantha, C. vietnamensis, and C. oleifera in South China. Insects, 10, 98. https://doi.org/10.3390/insects10040098
[11]
Kale, P.J. (2013) Potential Pollinators of Gossypium hirsutum L. International Journal of Science and Research, 5, 1323-1328.
[12]
Mc Gregor, S.E. (1976) Insect Pollination of Cultivated Crop Plants. Agricultural Handbook No. 496. Agricultural Research Service, United States Department of Agriculture, Washington DC.
Rhodes, J. (2002) Cotton Pollination by Honey Bees. Australian Journal of Experimental Agriculture, 42, 513-518. https://doi.org/10.1071/EA01063
[15]
Malerbo-Souza, D.T. and Halak, A.L. (2011) Frequência e comportamento de abelhas e outros insetos nas flores do algodoeiro (Gossypium hirsutum L.). Zootecnia Tropical, 29, 475-484.
[16]
Pires, V.C., Silveira, F.A., Sujii, E.R., Torezani, K.R.S., Rodrigues, W.A., Albuquerque, F.A., Rodrigues, S.M.M., Salomão, A.N. and Pires, C.S.S. (2014) Importance of Bee Pollination for Cotton Production in Conventional and Organic Farms in Brazil. Journal of Pollination Ecology, 13, 151-160. https://doi.org/10.26786/1920-7603(2014)20
[17]
Mazi, S., Tchuenguem, F.F.N. and Brückner, D. (2013) Foraging and Pollination Behavior of Apis mellifera Adansonii Latreille (Hymenoptera: Apidae) on Gossypium hirsutum (Malvaceae) Flowers at Dang (Ngaoundéré, Cameroon). Journal of Agricultural Science and Technology, 3, 267-280.
[18]
Dounia and Tchuenguem, F.F.N. (2013) Foraging and Pollination Activity of Apis mellifera Adansonii. Latreille (Hymenoptera: Apidae) on Flowers of Gossypium hirsutum L. (Malvaceae) at Maroua, Cameroon. Journal of Plant Science, 4, 33-44.
[19]
Tchuenguem, F.F.N. (2005) Activité de butinage et de pollinisation de Apis mellifera Adansonii Latreille (Hymenoptera: Apidae, Apinae) sur les fleurs de trois plantes à Ngaoundéré (Cameroun): Callistemon rigidus (Myrtaceae), Syzygium guineense var. macrocarpum (Myrtaceae) et Voacanga africana (Apocynaceae). Thèse de Doctorat d’Etat, Université de Yaoundé I, Yaoundé.
[20]
Jacob-Remacle, A. (1989) Comportement de butinage de l’abeille domestique et des Abeilles sauvages dans des vergers de pommiers en Belgique. Apidologie, 20, 271-285. https://doi.org/10.1051/apido:19890401
[21]
Dafni, A. (1992) Pollination Ecology, a Practical Approach. Oxford University Press, New York.
[22]
Delaplane, K.S. and Mayer, D.F. (2000) Crop Pollination by Bees. CABI Pub. Wallingford, Oxon. https://doi.org/10.1079/9780851994482.0000
[23]
Mungomery, J.E. and Glassop, A.J. (1969) Natural Cross-Pollination of Cotton in Central Queensland. Journal of Agriculture and Animal Sciences, 26, 69-74.
[24]
Mazi, S., Tchuenguem, F.F.N. and Brückner, D. (2014) Foraging and Pollination Behavior of Chalicodoma rufipes L. (Hymenoptera: Megachilidae) on Cajanus cajan L. Mill sp. (Fabaceae) Flowers at Dang (Ngaoundere, Cameroon). International Journal of Agronomy and Agricultural Research, 4, 77-88.
[25]
Dounia and Tchuenguem, F.F.N. (2014) Foraging and Pollination Activity of Macronomia vulpina (Gerstaecker, 1857) (Hymenoptera: Halictidae) on Gossypium hirsutum L. (Malvaceae) Flowers at Maroua, Cameroon. International Journal of Agronomy and Agricultural Research, 4, 1-10.
[26]
Canto, A., Pérez, R., Medrano, M., Castellanos, M.C. and Herrera, C.M. (2007) Intra-Plant Variation in Nectar Sugar Composition in Two Aquilegia Species (Ranunculaceae): Contrasting Patterns under Field and Glasshouse Conditions. Annals of Botany, 99, 653-660. https://doi.org/10.1093/aob/mcl291
[27]
Woodcock, T.S. (2012) Pollination in the Agricultural Landscape. Canadian Pollination Initiative, 113 p.
[28]
Knopper, L.D., Dan, T., Reisig, D.D., Johnson, J.D. and Bowers, L.M. (2016) Sugar Concentration in Nectar: A Quantitative Metric of Crop Attractiveness for Refined Pollinator Risk Assessments. Pest Management Science, 72, 1807-1812. https://doi.org/10.1002/ps.4321
[29]
Mazi, S., Kingha, T.B.M., Deli, K.P., Faibawa, E. and Brückner, D. (2019) Role of Pollinators in Enhancing Pod and Seed Set of Arachis hypogaea Variety 28-206 (Fabaceae) at Tchabal-Mounguel (Ngaoundere, Cameroon). Journal of Entomology and Zoology Studies, 7, 1521-1528.
[30]
Pamminger, T., Becker, R., Himmelreich, S., Schneider, C.W. and Bergtold, M. (2019) The Nectar Report: Quantitative Review of Nectar Sugar Concentrations Offered by Bee Visited Flowers in Agricultural and Non-Agricultural Landscapes. PeerJ, 7, 63-29. https://doi.org/10.7717/peerj.6329
[31]
Herrera, C.M. (1990) Daily Patterns of Pollinator Activity, Differential Pollinating Effectiveness, and Floral Resource Availability, in a Summer-Flowering Mediterranean Shrub. Oikos, 58, 277-288. https://doi.org/10.2307/3545218
[32]
von Frisch, K. (1967) The Dance Language and Orientation of Bees. The Belknap Press of Harvard University Press, Cambridge.
