Effect of Acibenzolar-S-methyl on the severity of Pythium sp. in tomato

Authors

  • Ernesto Fernández-Herrera 1Departamento de Agricultura y Ganadería-Universidad de Sonora. Carretera Bahía de Kino km 21, Hermosillo, Sonora, México. AP. 305. https://orcid.org/0000-0002-9391-405X
  • Irene Iliana Ramírez-Bustos Unidad Académica Hermosillo-Universidad Estatal de Sonora. Avenida Ley Federal del Trabajo s/n, Hermosillo, Sonora, México. Tel. 662 6890100
  • Carmen Isela Ortega-Rosas Unidad Académica Hermosillo-Universidad Estatal de Sonora. Avenida Ley Federal del Trabajo s/n, Hermosillo, Sonora, México. Tel. 662 6890100 https://orcid.org/0000-0002-1485-7895
  • Mari Carmen López-Pérez Unidad Académica Navojoa-Universidad Estatal de Sonora. Blvd. Manlio Fabio Beltrones 810, Bugambilias, Navojoa, México. CP. 85875 https://orcid.org/0000-0002-7694-5102
  • José Alfredo Ramírez-García Departamento de Agricultura y Ganadería-Universidad de Sonora. Carretera Bahía de Kino km 21, Hermosillo, Sonora, México. AP. 305

DOI:

https://doi.org/10.29312/remexca.v16i7.3887

Keywords:

Solanum lycopersicum, oomycete, root diseases

Abstract

In tomatoes, the genus Pythium can cause economic losses of up to 50%. Acibenzolar-S-methyl is an inducer of plant defense, which has shown effectiveness against diseases caused by fungi, viruses and bacteria. The objectives of this study were to determine the in vitro effect of Acibenzolar-S-methyl on mycelial growth and on the severity of tomato seedling damping-off caused by Pythium sp. The in vitro effect was determined in V8 culture medium, whereas the severity of damping-off was determined in seedlings with two true leaves. Acibenzolar-S-methyl was applied via irrigation at concentrations of 10, 15, 20, 30 and 40 mg L-1, three days before inoculating the seedlings with the oomycete. Pythium severity was evaluated eight days after inoculating the pathogen. Acibenzolar-S-methyl did not affect the mycelial growth of the oomycete under in vitro conditions. In seedlings, the 15 mg L-1 dose of the inducing product significantly reduced the damage caused by the oomycete, compared to the control treatment and the fungicide treatment. These results suggest that Acibenzolar-S-methyl could represent another option for managing tomato seedling damping-off caused by Pythium sp.

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Published

2025-11-18

How to Cite

Fernández-Herrera, Ernesto, Irene Iliana Ramírez-Bustos, Carmen Isela Ortega-Rosas, Mari Carmen López-Pérez, and José Alfredo Ramírez-García. 2025. “Effect of Acibenzolar-S-Methyl on the Severity of Pythium Sp. In Tomato”. Revista Mexicana De Ciencias Agrícolas 16 (7). México, ME:e3887. https://doi.org/10.29312/remexca.v16i7.3887.

Issue

Vol. 16 No. 7 (2025)

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