Control químico de Fusariosis de la espiga del trigo y su efecto sobre los componentes de producción y calidad de granos

Ruth Fabiola Scholz; Lidia Quintana; Aldo Ortiz; Man Mohan Kohli

doi:10.18004/investig.agrar.2021.junio.2301559

Authors

Ruth Fabiola Scholz Instituto Paraguayo de Tecnología Agropecuaria, Centro de Investigaciones Capitán Miranda. Capitán Miranda, Paraguay https://orcid.org/0000-0002-0212-4432
Lidia Quintana Universidad Nacional de Itapúa, Facultad de Ciencias Agropecuarias y Forestales. Itapúa, Paraguay https://orcid.org/0000-0002-8889-0970
Aldo Ortiz Universidad Nacional de Itapúa, Facultad de Ciencias Agropecuarias y Forestales. Itapúa, Paraguay. https://orcid.org/0000-0002-2307-3101
Man Mohan Kohli Cámara Paraguaya de Exportadores y Comercializadores de Cereales y Oleaginosas. Asunción, Paraguay. https://orcid.org/0000-0001-7379-9886

DOI:

https://doi.org/10.18004/investig.agrar.2021.junio.2301559

Keywords:

Triticum aestivum, Fusarium graminearum, fungicides, deoxynivalenol

Abstract

Fusarium head blight (FHB), produced mainly by Fusarium graminearum, it is one of the most relevant diseases for wheat production in Paraguay which continues to threaten the economic sustainability of crop producers, causing losses in grain yield and quality. The objective of the experiment was to evaluate different chemical groups of fungicides for the control of Fusarium head blight and its effect on yield and mycotoxin deoxynivalenol levels in wheat grains. The fungicides were applied in three wheat growth stages: head emergence, anthesis and milky grains. All fungicides evaluated (Tebuconazole, Metconazole + Epoxiconazole, Azoxystrobin, Fluxapyroxad + Epoxyconazole + Pyraclostrobin, Azoxystrobin + Benzovindiflupir) significantly decreased the infection levels of Fusarium head blight and increased the yield and thousand grains weight compared with the non-sprayed control. Treatments that included strobilurins in their composition resulted in the highest levels of DON (4.07-4.27 ppm) in wheat grains. Among the fungicides evaluated, Tebuconazole showed the lowest level of DON concentration in grain (1-1.5 ppm).

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