INVESTIGADORES
CHULZE Sofia Noemi
congresos y reuniones científicas
Título:
Biological control of Fusarium head blight Bacillus velezensis RC 218 on wehat yield grain quality and deoxynvialenol accumulation
Autor/es:
CANTORO R; PALAZZINI J.M; CHULZE , S.N
Lugar:
San Juan
Reunión:
Congreso; IMC 11 International Mycological Congress; 2018
Institución organizadora:
International Society on Mycology
Resumen:
Fusarium head blight (FHB) is a worldwide relevant disease that causes important losses ingrain yield, quality and safety. FHB in Argentina is mainly caused by Fusarium graminearum sensu stricto when high humidity conditions prevail during wheat anthesis stage. Management strategies to control the disease includes fungicide use, crop rotation, soil tilling and planting of less susceptible varieties,none of them being completely effective. Biological control offers an environmentally friendly tool thatcould be incorporated in the frame of an integrated pest management. Previous studies by our research group have showed the effectiveness of Bacillus velezensis RC 218 on FHB severity and deoxynivalenol (DON) accumulation. The aim of the present study was to analyze the impact of B. velezensis RC 218 over yield and quality parameters of wheat infected by F. graminearum. Two field trials with a complete randomized design were carried out in Marcos Juárez, Córdoba and Necochea, Buenos Aires, Argentina. During anthesis stage the following treatments were applied: i) Fusarium graminearum; ii) B. velezensis RC 218; iii) F. graminearum + B. velezensis RC 218 and iv) water + 0.05% tween (control). At 21 days post inoculation, FHB incidence and severity were evaluated and grains were harvested at maturity. Yield components, quality parameters, Fusarium-damage kernel (FDK) and DON content weremeasured. B. velezensis RC 218 showed effectiveness as biocontrol agent in both trials carried out in Marcos Juarez and Necochea. A disease incidence reduction of 29% and 20% was observed in both field trials. Severity was also significantly reduced by 52% and 58%. No significant differences wereobserved in grain yield nor in 1000-grain weight. A significant reduction of FDK was also observed. The results suggest that the application of B. velezensis RC 218 is a valuable tool to maintain good quality and safety of harvested wheat grains