Biological control of Fusarium graminearum sensu stricto, causal agent of Fusarium head blight of wheat, using formulated antagonists under field conditions in Argentina

• Autores: Palazzini, Juan Manuel; Alberione, Enrique Javier; Torres, Adriana; Donat, Christina; Kohl, Jürgen; Chulze, Sofia Noemí
• Año de publicación: 2016
• Idioma: inglés
• Tipo de recurso: artículo
• Fuente: Biological control 94 : 56-61. (March 2016)
• Materia: Trigo; Enfermedades de las Plantas; Gibberella Zeae; Control Biológico; Fusariosis; Wheat; Plant Diseases; Biological Control; Fusarium graminearum; Argentina
• Institución: Instituto Nacional de Tecnología Agropecuaria

Fusarium head blight (FHB) mainly caused by Fusarium graminearum is a devastating disease that causes extensive yield and quality losses to wheat in humid and semi-humid regions of the world. The biocontrol effect of two bacterial strains on FHB incidence, severity and deoxynivalenol (DON) accumulation in wheat was evaluated in field trials during 2010 and 2011 at Marcos Juarez, Córdoba province, Argentina. Bacillus subtilis RC 218 and Brevibacillus sp. RC 263 applied at anthesis period were evaluated through several combinations of cell type, strains, inoculum density (104 and 106 cfu/ml) and physiological modification. A significant and consistent biocontrol effect on FHB severity and DON contamination was observed in all the evaluated treatments during both 2010 and 2011 field trials. Reduction in FHB severity ranged 62–76% and 42–58% for 2010 and 2011 field trials, respectively. When evaluating the effect of the combined strains (104 + 104 and 106 + 106 cfu/ml), a better biocontrol effect was observed in 2010 field trial. After biocontrol treatments, no DON accumulation was observed in wheat heads; meanwhile in control plots an average of 1372 μg/kg DON was detected during the two trials. FHB incidence was significantly reduced by biocontrol treatments during the 2010 field trial but not during the 2011 field trial. The results showed the effectiveness of the two formulated biological control agents in reducing both FHB severity and DON accumulation by F. graminearum under semi controlled field conditions.
EEA Marcos Juárez
Fil: Palazzini, Juan Manuel. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Físico, Químicas y Naturales. Departamento de Microbiología e Inmunología; Argentina
Fil: Alberione, Enrique Javier. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Marcos Juárez; Argentina
Fil: Torres, Adriana. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Físico, Químicas y Naturales. Departamento de Microbiología e Inmunología; Argentina
Fil: Donat, Christina. Bio-ferm GmbH; Austria
Fil: Kohl, Jürgen. Wageningen UR, Plant Research International; Holanda
Fil: Chulze, Sofia Noemí. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Físico, Químicas y Naturales. Departamento de Microbiología e Inmunología; Argentina.