Evaluación del herbicida halosulfuron-metil para el control de malezas en el cultivo de arroz (Oryza sativa L.)

Bioagro, ISSN 1316-3361, Vol. 16, Nº. 3, 2004, pags. 173-182 10/2013;
Source: OAI

ABSTRACT Con el fin de evaluar la eficacia del herbicida halosulfuron-metil en el control de malezas y la selectividad en el cultivo de arroz (Oryza sativa L.), se realizó un ensayo en la estación experimental de Agua Blanca del Instituto Nacional de Investigaciones Agrícolas (INIA), Venezuela. El diseño experimental utilizado fue el de bloques al azar con cinco tratamientos y cuatro repeticiones. Los tratamientos consistieron en diferentes dosis del herbicida (0, 15, 30, 45 y 60 g i.a.·ha-1) aplicados en el cultivo de arroz 26 días después de la siembra. Se evaluó el daño al cultivo, porcentaje de pérdidas, número de macollas por planta, altura de las plantas, número de granos de arroz por panícula, peso de 1000 granos y rendimiento de arroz paddy, así como el porcentaje de control de especies de malezas y su cobertura total en el suelo. Las dosis evaluadas del herbicida no causaron ningún síntoma fitotóxico al cultivo. Se detectó un mayor crecimiento en algunas variables del cultivo, especialmente la altura de planta y número de macollas. La dosis de 60 g i.a.·ha-1 produjo el mayor control (superior al 90 %) de las malezas ciperáceas además de proporcionar un buen control (superior al 80 %) de las malezas Ludwigia sp. e Ischaemum rugosum. Algunas especies se mostraron tolerantes al herbicida, tales como las gramíneas Leptochloa virgata y Echinochloa colona

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