Selectivity of the herbicide metribuzin for pre- and post-emergence applications in potato cultivation

• Autor(a) principal: Correia, Núbia Maria
• Data de Publicação: 2018
• Outros Autores: Carvalho, Agnaldo Doniizete Ferreira de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Semina. Ciências Agrárias (Online)
• Texto Completo: https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/29594
• topic: Agata; Atlantic; Phytotoxicity; Solanum tuberosum L.; Ágata; Atlantic; Fitointoxicação; Solanum tuberosum L.

Metribuzin is the most commonly used herbicide in potato cultivation in Brazil, but there are few reports in literature regarding its selectivity, especially when applied to post-emergent potato plants. The objective of this study was to evaluate the selectivity of the herbicide metribuzin for potato cultivation, applied in pre-and post-emergence. Two experiments were carried out under field conditions, one with the Agata cultivar and another with the Atlantic cultivar. A randomized block experimental design, with a subdivided plot (5 × 3) and four replications, was used in both experiments. Plot experiments consisted of five doses of metribuzin (0, 120, 240, 360, and 480 g a.i. ha-1), studied for pre-emergence, as well as three doses (0, 120, and 192 g a.i. ha-1) studied for post-emergence. Metribuzin was selective for the Agata and Atlantic cultivars at doses of up to 480 g ha-1 for pre-emergence, as well as at 120 or 192 g ha-1 for post-emergence, applied seven days after hilling.