Sensitivity of bean and corn Rhizoctonia species to chemical fungicides

Authors

  • Karen Rabago-Zavala Facultad de Agricultura del Valle del Fuerte-Universidad Autónoma de Sinaloa. Avenida Japaraquí s/n y Calle 16, Juan José Ríos, Sinaloa, México. CP. 81110
  • Fernando Alberto Valenzuela-Escoboza Facultad de Agricultura del Valle del Fuerte-Universidad Autónoma de Sinaloa. Avenida Japaraquí s/n y Calle 16, Juan José Ríos, Sinaloa, México. CP. 81110
  • Blanca Elvira López-Valenzuela Facultad de Agricultura del Valle del Fuerte-Universidad Autónoma de Sinaloa. Avenida Japaraquí s/n y Calle 16, Juan José Ríos, Sinaloa, México. CP. 81110
  • Quintín Armando Ayala-Armenta Facultad de Agricultura del Valle del Fuerte-Universidad Autónoma de Sinaloa. Avenida Japaraquí s/n y Calle 16, Juan José Ríos, Sinaloa, México. CP. 81110
  • Juan Luis Pérez-Mora Facultad de Agricultura del Valle del Fuerte-Universidad Autónoma de Sinaloa. Avenida Japaraquí s/n y Calle 16, Juan José Ríos, Sinaloa, México. CP. 81110

DOI:

https://doi.org/10.29312/remexca.v16i7.3836

Keywords:

fungicides, resistance, rhizoctoniasis, tebuconazole

Abstract

In the northern region of Sinaloa, the fungus Rhizoctonia spp. causes plants to dry and rot in beans and corn, affecting germination, growth, and roots. This weakens and causes death in plants. Farmers often seek to mitigate the disease by applying chemical fungicides; however, the effectiveness of these treatments is often limited. This is due to inappropriate selection of fungicides, incorrect dosing during application, and pathogens’ potential acquired resistance to these compounds, among other factors. The purpose of this study was to evaluate the in vitro sensitivity of Rhizoctonia isolates from beans and corn to four synthetic fungicides (Azoxystrobin, Benomyl, Methyl thiophanate and Tebuconazole). A completely randomized design was performed, using the commercial dose of each fungicide and a control, with three replications per treatment. The conventional fungicide tebuconazole proved to be the most effective against all Rhizoctonia species evaluated, inhibiting growth by 100%. Effectiveness tests on the sensitivity of Rhizoctonia isolates to fungicides allow us to know the variability of behavior and facilitate the monitoring of isolates that present resistance to fungicides in the pathogen population. This is essential for the development of effective control strategies for Rhizoctoniasis.

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References

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Published

2025-11-25

How to Cite

Rabago-Zavala, Karen, Fernando Alberto Valenzuela-Escoboza, Blanca Elvira López-Valenzuela, Quintín Armando Ayala-Armenta, and Juan Luis Pérez-Mora. 2025. “Sensitivity of Bean and Corn Rhizoctonia Species to Chemical Fungicides”. Revista Mexicana De Ciencias Agrícolas 16 (7). México, ME:e3836. https://doi.org/10.29312/remexca.v16i7.3836.

Issue

Vol. 16 No. 7 (2025)

Section

Investigation notes

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