Fungicide mixtures to control Asian soybean rust control in regions of Brazil

Authors

  • Gilberto Macedo Siqueira Filho
    • Daniel Pena Pereira
      • Arcangelo Loss
        • José Luiz Rodrigues Torres
          • Ernane Miranda Lemes

            Keywords:

            Phakopsora pachyrhizi. Fluxapyroxad. Inpyrfluxam. Triazole. Strobilurin

            Abstract

            High soybean grain yield is based on adequate crop management, mainly on disease prevention and control, especially
            Asian soybean rust (ASR), which causes great crop damage. This study aimed to evaluate the ASR chemical control with diff erent
            fungicide mixtures in three soybean-producing areas in Brazil during two consecutive crop seasons. Four fungicide treatments
            [T1: benzovindyflupyr + picoxystrobin, T2: benzovindyflupyr + azoxystrobin, T3: fluxapyroxad + pyraclostrobin, and T4:
            inpyrfluxam + tebuconazole] were evaluated with five replications. Phytotoxicity damage, ASR disease severity, plant
            defoliation, 1,00 0 -grain weight, and grain yield were evaluated. The results were relatively consistent among all regions and between
            the crop seasons, indicating that the treatments have similar responses when applied in diverse conditions. The T3 and T4 treatments
            presented higher phytotoxicity, lower disease severity, lower plant defoliation, and higher 1,000-grain weight and grain yield.
            The presence and damage caused by ASR tend to increase after the second soybean crop season in the same area, suggesting a
            loss of efficiency of the evaluated fungicides.

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            Author Biographies

            • Daniel Pena Pereira

               

               
            • Arcangelo Loss

               

                 
            • José Luiz Rodrigues Torres

               

               
            • Ernane Miranda Lemes

               

               

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            Published

            2024-12-06

            Issue

            Vol. 56 (2025)

            Section

            Crop Science

            License

            Atribuição
            CC BY

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            How to Cite

            MACEDO SIQUEIRA FILHO, Gilberto; PENA PEREIRA, Daniel; LOSS, Arcangelo; RODRIGUES TORRES, José Luiz; MIRANDA LEMES, Ernane. Fungicide mixtures to control Asian soybean rust control in regions of Brazil. Revista Ciência Agronômica, [S. l.], v. 56, p. 1–11, 2024. Disponível em: https://periodicos.ufc.br/revistacienciaagronomica/article/view/92838. Acesso em: 8 jul. 2026.