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Five tomato varieties, including a local check, were assessed for their resistance to Tomato yellow leaf curl disease, without phyto sanitary treatments, at the Food Crops Research Station of the National Agronomic Research Centre (CNRA) in Bouake. Two resistant varieties to the disease (CLN2126B and CLN2123A) were obtained from AVRDC-The World Vegetable Center and the two others (IDSA108 and IDSA109) from CNRA. Results showed that all the assessed varieties presented symptoms characteristic of leaf curl. Mean severity index of this disease, calculated from a given scale of annotation, was greater than 2,6 for all varieties, demonstrating their susceptibilities. For all the sowing dates, mean variety yields varied from 1680 to 6110 kg ha-1 for CLN2116B and the local check, respectively. Fruits weight varied from 17 to 39 g, for CLN2123A and the local check, respectively. Fruits number harvested varied between 27 to 68 for CLN2116B and the local check, respectively. The local check variety was the centre of great interest, due to its performances, which were superior to those of the 4 other varieties. Therefore, it could be recommended in both improvement and selection studies for tomato culture. Cinq varietes de tomate, dont un temoin local, ont ete evaluees pour leur resistance a la maladie de l'enroulement foliaire, sans traitements phytosanitaires, a la Station de Recherche sur les Cultures Vivrieres du Centre National de Recherche Agronomique (CNRA) de Bouake. Deux varietes resistantes au Tomato yellow leaf curl (CLN2126B et CLN2123A), provenaient de l'AVRDC-The World Vegetable Center et les deux autres (IDSA108, IDSA109) du CNRA. Les resultats montrent que toutes les varietes testees ont presente des symptomes caracteristiques de la maladie. L'indice moyen de severite de la maladie, calcule a partir d'une echelle d'annotation, a ete superieur a 2,6 pour toutes les varietes, demontrant, ainsi, leur sensibilite. Sur l'ensemble des semis, les rendements moyens des varietes ont varie entre 1680 et 6110 kg ha-1 pour CLN2116B et le temoin, respectivement. De meme, les poids moyens des fruits ont varie entre 17 et 39 g pour CLN2123A et le temoin, respectivement. Le nombre de fruits recoltes a varie, en moyenne, entre 27 et 68, pour CLN2116B et le temoin, respectivement. Le temoin local a ainsi ete l'objet d'un regain d'interet grâce a ses performances, qui sont superieures a celles des 4 autres varietes. Le temoin pourrait donc etre preconise dans des etudes ulterieures d'amelioration et de selection de varietes tolerantes en culture de tomate.

agronomie africaine

Performances agronomiques de la tomate (&lt;i&gt;Solanum lycopersicum&lt;/i&gt; L.) pour sa resistance a la maladie de l'enroulement jaunissant des feuilles au centre de la C&amp;#244te d'Ivoire