Eficiência de agroquímicos no controle da ferrugem asiática da soja com aplicações calendarizadas em cultivo tardio na região sudoeste do Paraná

Abstract

Soybeans is one of the main crops grown in the world, Brazil is in second place as world production. The constant quest for high productivity, causes seek effective methods in the prevention of diseases and aspects that may compromise the production. Among these pathologies is the Asian Rust caused by the fungus Phakopsora pachyrhizi. Objective to evaluate the sensitivity of the phytopathogenic fungus Phakopsora pachyrhizi to agrochemicals in farming in soy late management program with scheduled applications. The experiment was deployed in the experimental area of Agronomy course of the Federal University of Paraná-UTFPR Campus Pato Branco. Were composed of products triazol, estrobilurinas, and carboxamidas, another product only-triazol and estrobilurinas, was also used a protective fungicide composed of mancozeb that were applied in a scheduled. The application scheduled in late cultivation compromised the efficiency of fungicides. The active ingredient with the highest grain yield was trifloxystrobin + protioconazol associated or not with mancozeb and pyraclostrobin + epoxiconazol + fluxapiroxade associated or not with mancozeb. The use of mancozeb associated or not to products used had no effect on mass of thousand grains.