Use of isolated fungicides for the control of Phakopsora pachyrhizi in soybean

• Rafaela Muraro

  Author

• Nadiel Kist

  Author

• Mauricio Paulo Batistella Pasini

  Author

• Jana Koefender

  Author

• Rafael Pivotto Bortolotto

  Author

• André Schoffel

  Author

• Luana Carvalhaes Coutinho

  Author

• Juliane Camera

  Author

The occurrence of diseases in soybean crop has negatively affected its development and caused significant losses in productivity. Among the diseases, Asian rust caused by the fungus Phakopsora pachyrhizi Sydow stands out because of its high severity. As a way of controlling, chemical fungicides is a tool used to mitigate the damage. The objective of this work was to evaluate the efficiency of different isolated fungicides in the control of Asian rust. The experiment was carried out in the experimental area of ​​the University of Cruz Alta in the state of Rio Grande do Sul with a randomized block design and four replications. The cultivar used was BMX Ativa, and the fungicide applications occurred before the interline closure and later with 15 days of interval between applications. The fungicides tested in the experiment were: metominostrobin + tebuconazole, piraclostrobin + fluxpyroxade, picoxystrobin + cyproconazole, Azoxystrobin + benzovindiflupir, picoxystrobin + benzovindiflupir, Trifloxystrobin + protioconazole, Pyraclostrobin + epoxiconazole + fluxpyroxade, Bixafen + protioconazole + Trifloxystrobin, Mancozebe + picoxystrobin + tebuconazole and control. The variables analyzed were yield kg ha^-1, weight of one thousand seeds and disease severity. The fungicides Mancozebe + picoxystrobin + tebuconazole and bixafen + protioconazole + trifloxystrobin showed the highest yield, one thousand grain weight and lower severity of Asian soybean rust.

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Copyright (c) 2020 Rafaela Muraro, Nadiel Kirst, Jana Koefender, Mauricio Paulo Batistella Pasini, Rafael Pivotto Bortolotto, André Schoffel, Luana Carvalhaes Coutinho , Juliane Camera

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