Does growth regulator associated with fungicide interfere on productivity of upland rice?

• Autor(a) principal: Meirelles, Flávia Constantino
• Data de Publicação: 2020
• Outros Autores: Rangel Gonzaga, Alex, Arf, Orivaldo, Roberto Portugal, José, Ribeiro Peres Portugal, Amanda
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista de Ciências Agrárias (Belém. Online)
• Texto Completo: https://ajaes.ufra.edu.br/index.php/ajaes/article/view/3253
• topic: Oryza sativa L.; epoxiconazol piraclostrobina; etil-trinexapac; acamamento; altura de plantas; Agronomy; Oryza sativa L.; epoxiconazole pyraclostrobin; ethyl-trinexapac; lodging; plants height; Agronomia

Management measures should be tested to increase the rice productivity, a staple food that is in increasing demand. The aim of this study was to evaluate the efficacy of different doses of a plant growth regulator, ethyl-trinexapac, combined with the application of the fungicides epoxiconazole + pyraclostrobin in reducing the height of rice plants to avoid lodging and increase rice yield. The experiment was conducted in a dystrophic Oxisol soil during two harvests (2010/2011 and 2011/2012). The study was arranged in a randomized block design, in a 4 × 2 factorial scheme, with four replications. The factors considered were four doses of trinexapac- ethyl (0, 25, 50, and 75 g ha-1 active ingredient (a.i.)), with or without application of fungicide (137.25 g ha-1 a.i.). The growth regulator caused a reduction in plant height in both harvests and affected the number of panicles per square meter in the second harvest. The fungicide had no effect on the productivity and yield components of the crop.