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ESTRATEGIAS DE CONTROL DE LA ROYA DEL CAFETO CON LA APLICACIÓN DE FUNGICIDA PROTECTOR Y SISTÉMICO EN VIÇOSA, MINAS GERAIS, BRASIL

ESTRATEGIAS DE CONTROL DE LA ROYA DEL CAFETO CON LA APLICACIÓN DE FUNGICIDA PROTECTOR Y SISTÉMICO EN VIÇOSA, MINAS GERAIS, BRASIL,Ramón Silva-Acuña,La

ESTRATEGIAS DE CONTROL DE LA ROYA DEL CAFETO CON LA APLICACIÓN DE FUNGICIDA PROTECTOR Y SISTÉMICO EN VIÇOSA, MINAS GERAIS, BRASIL  
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Strategies to control coffee leaf rust with the application of protective and systemic fungicide in Viçosa, Minas Gerais, Brazil An experiment was conducted at Teixeiras, state of Minas Gerais, Brazil, to determine the alternative of using copper oxychloride 50% and triadimenol 6 GR to control coffee leaf rust and evaluate the use of different doses of triadimenol + disulfoton. In the first cycle, the use of the cupric fungicide protected the crop with more efficiency than the formulations of the systemic one, and in the following two cycles it was detected effectiveness of the treatment of four sprays between December and March. It was also detected effectiveness of the dose of 0.72 kg/ha of triadimenol during the first cycle. In the next cycle the defoliation caused by Perileucoptera coffeella implied low levels of the disease, not attributed to efficiency of the fungicide. Due to the effect of biannual production, in the third cycle the best control was reached with the dose of 0.72 kg/ha of triadimenol. There was not effect of the dose on yield. The treatments with triadimenol + disulfoton resulted in the lower levels of the disease and high yields. The gradual decrease of the dose until reaching the current recommendations did not affect the control of the disease, although in the second cycle decreased the production in the treatment with reapplication of the initial dose. In the third cycle, when the dose was decreased to ¼ of the initial, differences were not found in control of the disease or coffee production. Additional key words: Hemileia vastatrix, Coffea arabica, chemical control
Published in 2002.
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