ABSTRACT.


HUIB TOLLENAAR1, EDMUNDO BERATTO M.2 Y GONZALO NAREA C.3
 

Agrosan CN, Granozol M, Vitavax and Uspulun Seco were tested for their effectiveness in the ,control of oat, smut Ustilago avenae (Pers) Rostr.
All fungicides reduced infection, but only applications of Vitavax (2,3 - dihydro - 5 - carboxanilido - 6 - methyl - 1,4 - oxathiin) at Concentrations of 250 gr. Vitavax or more (as slurry) / 100 Kg. seed, or 500 gr. Vitavax (in dust form) / 100 Kg. seed resulted in complete smut control.

Keywords:
1 Ph. D., Fitopatólogo, International Service Faculty, University of California, Davis, California, USA., y Profesor Extraordinario, Facultad de Agronomía, Universidad de Concepción, Chillán.
2 Ingeniero Agrónomo, Estación Experimental Carillanca. Instituto de Investigaciones Agropecuarias.
3 Estudiante, Escuela de Agrononía, Universidad de Concepción, Chillán.