Abstract

SILVA COELHO, Fabrício; REZENDE ALVARENGA, Marco Antônio; BEZERRA LEAO, Armindo  and  RODRIGUES, Leandro. CONTROL OF ALTERNARIA SOLANI WITH FUNGICIDES IN TOMATO PLANTS. Rev. Fac. Nac. Agron. Medellín [online]. 2011, vol.64, n.1, pp.5845-5851. ISSN 0304-2847.

The early blight disease on tomato, caused by the fungus Alternaria solani, is referred to in importance due its destructive power, under conditions of high temperature and humidity. This study aimed to evaluate the effectiveness of various fungicides in your control in the region of Lavras-MG, Brazil. The experiment was conducted at the Federal University of Lavras, Department of Agriculture in the period from November 2004 to January 2005. The experimental design was randomized blocks with 10 treatments and four replications, each plot comprise 12 plants. The applications were made with a manual spray costal (45 lbf/pol2), volume for the application of 800 L•ha-1 and seven applications in an interval of seven days. Five evaluations were accomplished for the leaf severity of the disease with the use of a diagrammatic scale. All the fungicides presented potential for the control of early blight inside of the inherent characteristics in their chemical group. The best control levels were obtained with the treatments Chlorothalonyl 500 g•L-1 + Tetraconazol 20 g•L-1 (dosage 200 mL•100 L-1), Chlorothalonyl 400 g•L-1 + Copper oxychloride 420 g•kg-1 and Chlorothalonyl 750 g•kg-1 + Tetraconazol 20 g•kg-1 (dosage 150 g•100 L-1). Tetraconazol 100 g•L-1 provided the smallest control levels.

Keywords : Lycopersicum esculentum; fungal diseases; chemical control.

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