Hongos asociados a la mancha de asfalto en el cultivo de maíz en México

Herrera, Erika Natalia Ríos; Fuentes, Yisa María Ochoa; Chávez, Ernesto Cerna; Flores, Jerónimo Landeros; Siller, Melchor Cepeda; Guerra, Raúl

doi:10.29312/remexca.v8i2.65

Cited by 4 publications

(1 citation statement)

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“…Maize is the most cultivated product in Cherán, Michoacán, Mexico, because it is essential for the self-consumption of families throughout the year and also because it generates income by being sold in the same community or in neighboring towns [1]. It is a seasonal crop that is planted in the 'year and time' modality, or biennial rotation; however, it is not unaffected by diseases caused by fungi such as leaf blight (Exseroilum turcicum), gray leaf spot (GLS) (Phyllachora maydis, Monographella maydis and Coniothyrium phyllachorae), and leaf rust (Puccinia sorghi) [2,3].…”

Section: Introductionmentioning

confidence: 99%

Antifungal Activity of Rue Essential Oil and Commercial Chitosan on Native Corn Foliar Diseases

Ceja-Torres,

López-Díaz,

Silva-Ramos

et al. 2023

Plants

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Native corn in Cherán, Michoacán, southwestern Mexico, represents a high-impact economic, social, and religious support, although its yield is low due to fungal diseases. Fungicides are mainly used for their control, but the fungi involved create resistance. The aims of this study are to determine the incidence of foliar diseases in the field, isolate the causal fungi, evaluate the in vitro effect of the essential oil of rue (Ruta graveolens) on them, and identify the secondary metabolites. The essential oil was obtained using the steam distillation technique on fresh plants. Also used was an industrial-grade chitosan, and the commercial fungicide benomyl was used as a positive control. Rue essential oil was characterized by mass spectrometry with ultra-high-performance liquid chromatography with electrospray ionization (UHPLC-ESI). The highest incidence of disease was obtained for leaf rust (35%), followed by gray leaf spot (GLS) (24%) and leaf blight (19%). Rue essential oil inhibited 100% of the mycelial growth of Coniothyrium phyllachorae and 96% of the mycelium of Exseroilum turcicum. The benomyl fungicide effectively inhibited C. phyllachorae (86 to 91%), but not E. turcicum, with the opposite effect when using chitosan by inhibiting 89 to 90% of the latter’s mycelial development. The majority compound of the essential oil of R. graveolens was 2-(3-phenylprop-2-enoyl)chromen-4-one; however, fatty acids were also detected: linoleic, palmitic, and retinoic acid.

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Section: Introductionmentioning

confidence: 99%