Determinacion de fungicidas para el control de Rhizoctonia solani, en el cultivo de la papa Instituto Nacional de Investigaciones Agropecuarias, Quito Ecuador. Estacion Experimental Santa Catalina. Departamento Nacional de Proteccion Vegetal La costra negra producida por el hongo Rhizoctonia solani es una de las principales causas para la disminucion de rendimientos en papa, por lo que se realizo este estudio en lotes de la E. Sta Catalina del INIAP, utilizando dos manejos de suelo: monocultivo de papa y proveniente de potrero, se evaluaron 18 tratamientos en cada caso de suelo. Los tratamientos correspondieron a 3 niveles de severidad en el tuberculo-semilla 0, 10 y 20 por ciento de infeccion R. Se evaluaron 18 tratamientos productos de la combinacion de tuberculo con infeccion 0, 10 y 20 por ciento mas los productos Benzotiazol, Iprodione, Carboxin-Thiram, Azoxistrobina y Trichoderma harzianum; ademas de un testigo sin aplicacion de producto.

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