Open Access

ARTICLE

In vitro antifungal/fungistatic activity of manganese phosphite against soybean soil-borne pathogens

Carmona MA¹, E Simonetti^2,3, ME Ravotti¹, MM Sc,iani⁴, AG Luque⁴, NA Formento⁵, FJ Sautua¹

1 Fitopatología, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina.
2 Microbiología Agrícola, FAUBA.
3 Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (CONICET/UBA), FAUBA.
4 Centro de Referencia de Micología (CEREMIC), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, 2000 Rosario, Argentina.
5 INTA EEA Paraná, Paraná, Entre Ríos, Argentina.

Address correspondence to: Ing. Agr. M Sc Dr. Marcelo A. Carmona, e-mail: 18.IV.2015.

Phyton-International Journal of Experimental Botany 2017, 86(all), 265-269. https://doi.org/10.32604/phyton.2017.86.265

Abstract

Soybean root and stem rots caused by soil-borne pathogens are diseases commonly found in soybean fields, and one of the most important causes of crop losses. In the present study, the mycelial sensitivity of Fusarium virguliforme, F. tucumaniae, Sclerotinia sclerotiorum and Macrophomina phaseolina was evaluated on potato dextrose agar media (25 mL) supplemented with different concentrations of manganese phosphite (MnPhi) diluted in water (0, 25, 37.5, 50, 100, 200, 300, 400, 500, 800 and 1000 μg/mL). Mycelial growth sensitivity was analyzed using logarithmic linear regression analysis. The MnPhi concentration needed to inhibit 50% of the mycelial growth (IC₅₀) ranged from 105 μg/mL (Fusarium spp.) to 409 μg/mL (M. phaseolina). Sclerotia were completely inhibited at 500 μg/mL. The results of our study represent the first report on the direct in vitro fungicidal/fungistatic action of MnPhi against fungi that are causal agents of soil-borne diseases.

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