K. Ampong-nyarko, Weed management in rice in Africa, pp.183-191, 1996.

V. Balasubramanian, M. Sie, R. J. Hijmans, and K. Otsuka, Increasing rice production in Sub-Saharan Africa: challenges and opportunities, Adv. Agron, vol.94, pp.55-133, 2007.

M. Becker, D. E. Johnson, M. C. Wopereis, and A. Sow, Rice yield gaps in irrigated systems along an agroecological gradient in West Africa, J. Plant Nutr. Soil Sci, vol.166, pp.61-67, 2003.

G. Bouriquet, Une Scrophulariacée parasite du riz à Madagascar, Rev. Pathol. Vég. Entomol. Agric. France, vol.20, pp.149-151, 1933.

J. Cissé, M. Camara, D. K. Berner, and L. J. Musselman, Rhamphicarpa fistulosa (Scrophulariaceae) damages rice in Guinea, Advances in Parasitic Plant Research: 6 th Parasitic Weeds Symposium, pp.518-520, 1996.

S. Diallo and D. E. Et-johnson, Irrigated Rice in the Sahel: Prospects for Sustainable Development, pp.311-323, 1997.

. Dsid, Evolution des superficies, de la production et des rendements des principales cultures vivrières au Togo. Campagnes 1982/83 à 2004/2005. Direction des Statistiques agricoles et de la documentation, p.2, 2005.

G. Gbèhounou and P. Et-assigbé, Rhamphicarpa fistulosa (Hochst.) Benth. (Scrophulariaceae): new pest on lowland rice in Benin. Results of a survey and immediate control possibilities, Ann. Sci. Agron. Bénin, vol.4, pp.89-103, 2003.

D. Gledhill, Vegetation of superficial ironstone hardpans in Sierra-Leone, J. Ecol, vol.58, p.265, 1970.

G. Jackson and J. S. Gartlan, The flora and fauna of Lolui Island, Lake Victoria-a study of vegetation, men and monkeys, J. Ecol, vol.53, pp.573-597, 1965.

D. E. Johnson, C. Riches, M. Camara, and A. M. Mbwaga, Rhamphicarpa fistulosa on rice in Africa, Haustorium: Parasitic Plants Newsletter, vol.33, pp.2-3, 1998.

J. Kayeke, J. Rodenburg, F. Mwalyego, and R. Mghogho, Incidence and severity of the facultative parasitic weed Rhamphicarpa fistulosa in lowland rainfed rice in southern Tanzania, MAEP-ITRA, 2003. Les bas-fonds au Togo: Mise en valeur agricole et perspectives. (Régions des, 1969.

P. Marnotte, Influence des facteurs agroécologiques sur le développement des mauvaises herbes en climat tropical humide. Compte rendu du 7 ème Colloque international sur l'Ecologie, la Biologie et la Systématique des mauvaises herbes, pp.183-189, 1984.

O. Ouédraogo, U. Neumann, A. Raynal-roques, G. Sallé, C. Tuquet et al., Raynal-Roques A., 1994. Major, minor and potential parasitic weeds in semi-arid tropical Africa: the example of Scrophulariaceae, Biology and Management of Orobanche. Proceedings of the Third International Workshop on Orobanche and Related Striga Research. Royal Tropical Institute, vol.39, pp.400-405, 1999.

J. Rodenburg, N. Zossou, G. Gbèhounou, A. Ahanchede, A. Touré et al., Rhamphicarpa fistulosa, a parasitic weed threatening rain-fed lowland rice production in sub-saharan Africa-A case study from Bénin, Crop Prot, vol.30, pp.1306-1314, 2011.

J. Rodenburg, C. R. Riches, and J. M. Kayeke, Addressing current and future problems of parasitic weeds in rice, Crop Prot, vol.29, pp.210-221, 2010.

P. Staner, Cycnium et Rhamphicarpa (Scrophulariacées). Bull. jardin bot. l'état à Bruxelles, vol.15, pp.147-151, 1938.