REGIME HÍDRICO E PALHA INFLUENCIAM NA EFICÁCIA DE HERBICIDAS PRÉ-EMERGENTES NO CONTROLE DE CAPIM-AMARGOSO? Controle de capim amargoso através de herbicidas pré-emergentes

• Autor(a) principal: Maria Barros, Daniela
• Data de Publicação: 2023
• Outros Autores: Da Silva, Paulo Vinicius, Lazari Meurer, Heráclito, da Silva Santos Meurer, Letícia, Rocha Domingos, Edson, de Carvalho Dias, Roque, Maris Inácio, Estela, Andrea Monquero, Patrícia
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Nativa (Sinop)
• Texto Completo: https://periodicoscientificos.ufmt.br/ojs/index.php/nativa/article/view/11844
• topic: Digitaria insularis; residual; período de seca

The control of sourgrass (Digitaria insularis (L.) Fedde) is a challenge in soybean culture, and pre-emergent herbicides appear as a management option. The objective of this work was to evaluate the control of sourgrass using pre-emergent herbicides positioned in different water regimes and amounts of straw. The experiment was carried out in a greenhouse with a completely randomized design in a 6 x 3 factorial scheme, in the first factor the water regimes were allocated and in the second the pre-emergent herbicides (diclosulam (29.4 gia ha-1); flumioxazin + imazethapyr (50 + 106 gia ha-1) and diuron + sulfentrazone (420 + 210 gia ha-1)) these factors were isolated for the amounts of corn straw + Brachiaria ruziziensis (0 and 3 t ha-1). When applied directly to the soil and on straw, diclosulam showed the lowest percentages of control in all water regimes with the first rain of 5 mm and the second of 20 mm. Diuron + sulfentrazone and flumioxazin + imazethapyr did not present significant differences in water regimes, adequately controlling the sourgrass. The effectiveness of diclosulam was influenced by drought intervals after application, diuron + sulfentrazone and flumioxazin + imazethapyr showed an efficient control of sourgrass in all treatments.