Selectivity of the herbicide metribuzin for pre- and post-emergence applications in potato cultivation
DOI:
https://doi.org/10.5433/1679-0359.2018v39n3p963Keywords:
Agata, Atlantic, Phytotoxicity, Solanum tuberosum L.Abstract
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.Downloads
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