Floristic Inventory and Evaluation of the Effectiveness of Three Herbicides in South Gabon Olive Farms

Samson Daudet Medza-Mve, Université des Sciences et Techniques de Masuku, USTM-INSAB Gabon; Ayoni Ogunbayo ,Country Project Manager Regional Hub, West and Central Africa, BP 320, Bamako-Mali ; Julie Dumortier ,Université des Sciences et Techniques de Masuku, USTM-INSAB Gabon; Maurice Ognalaga ,Université des Sciences et Techniques de Masuku, USTM-INSAB Gabon; André Toussaint ,Université de Liège, Gembloux Agro-Bio Tech, 2 Passage des Déportés, 5030 Gembloux-Belgique

Glyphosate, Methyl Metsulfuron, Oil Palm, Weeds

This study was carried out on the site of oil palm agro-industrial exploitation in South-East Gabon. The aim was to evaluate effectiveness of three herbicides: Roundup (glyphosate), Finish (c) and Ally (metsulfuron methyl) on the weed flora. An inventory weed flora was conducted to estimate abundance-dominance, post-treatment patch coverage, weed recurrence time, and the optimal herbicide application rate. The results obtained show that the weed flora is composed of 22 dominant species, divided into 20 genera and 15 families. The three predominance families are Rubiaceae, Poaceae and Cyperaceae. A mixture of two herbicides, specifically Finish Ally (glyphosate-metsulfuron methyl and metsulfuron methyl), is the most effective, with 85% of weeds eliminated by day 30 and 74 days of recurrence.
    [1] N. Soltani et al., “Perspectives on Potential Soybean Yield Losses from Weeds in North America,” Weed Technol., vol. 31, no. 1, pp. 148–154, 2017. [2] F. Nurdiansyah, Y. Clough, K. Wiegand, and T. Tscharntke, “Local and Landscape Management Effects on Pests, Diseases, Weeds and Biocontrol in Oil Palm Plantations-A Review,” Local Landsc. Manag. Biol. Pest Control Oil Palm Plant., p. 14, 2016. [3] F. Gillet, “La phytosociologie synusiale intégrée Guide méthodologique,” Univ. Neuchâtel, Inst. Bot. Doc Labo Ecol Vég, vol. 1, 2000. [4] T. Le Bourgeois, “Les mauvaises herbes dans la rotation cotonnière au Nord-Cameroun(Afrique)- amplitude d’habitat et degré d’infestation- phénologie.” 1993. [5] J. Salamero, P. Marnotte, T. Le Bourgeois, and A. Carrara, “Détermination pratique de 14 rubiacées, adventices d’Afrique de l’Ouest et du Centre,” Agric. développement, no. 11, pp. 68–76, 1996. [6] E. C. Pielou, The interpretation of ecological data: a primer on classification and ordination. John Wiley & Sons, 1984. [7] C. F. Henderson and E. W. TILTON, “Tests with Acaricides against the Brown Wheat Mite 1 2,” J. Econ. Entomol., vol. 48, no. 2, pp. 157–161, 1955. [8] P. Y. Kouadio, M.-S. Tiébré, J. N. Kassi, and E. K. N’Guessan, “Diversité floristique et déterminants de l’enherbement des bananeraies industrielles de Dabou au sud de la Côte d’ivoire,” J. Appl. Biosci., vol. 68, pp. 5404–5416, 2013. [9] C. W. Agyakwa and I. O. Akobundu, A handbook of West African weeds. IITA, 1987. [10] C. Carême and T. Saghier, “Conséquences de la nuisibilité des mauvaises herbes sur la production du blé d’hiver en Tunisie: les seuils d’intervention et la rentabilité du désherbage,” Tropicultura, vol. 9, no. 2, pp. 53–57, 1991. [11] N. Song, D. Wang, Z. Shan, and L. Shi, “Influence of pH and dissolved organic matter on photolysis of metsulfuron-methyl,” Procedia Environ. Sci., vol. 18, pp. 585–591, 2013. [12] P. T. Fernandez-Moreno, A. M. Rojano-Delgado, J. Menendez, and R. De Prado, “First Case of Multiple Resistance to Glyphosate and PPO-inhibiting Herbicides in Rigid Ryegrass (Lolium rigidum) in Spain,” Weed Sci., pp. 1–9, 2017. [13] A. Mangara, M. T. Kouame, K. Soro, A. A. A. N’Da, G. M. Gnahoua, and D. Soro, “Test d’efficacité d’un herbicide en culture d’ananas, à la station d’expérimentation et de production d’Anguédédou en Côte d’Ivoire,” J. Appl. Biosci., vol. 80, no. 1, pp. 7161–7172, 2014. [14] G. Couture, J. Legris, and R. Langevin, Evaluation des impacts du glyphosate utilise dans le milieu forestier. Direction de l’environnement forestier, Service du suivi environnemental, 1995. [15] C. Gauvrit, “The efficacy and selectivity of herbicides,” Effic. Sel. Herbic., 1996. [16] W. R. Harris, R. D. Sammons, R. C. Grabiak, A. Mehrsheikh, and M. S. Bleeke, “Computer simulation of the interactions of glyphosate with metal ions in phloem,” J. Agric. Food Chem., vol. 60, no. 24, pp. 6077–6087, 2012.
Paper ID: GRDJEV03I020007
Published in: Volume : 3, Issue : 2
Publication Date: 2018-02-01
Page(s): 1 - 6