FUSARIUM GRAMINEARUM SENSU STRICTO AND FUSARIUM POAE ISOLATED FROM DIFFERENT BARLEY REGIONS IN ARGENTINA AND BIOCONTROL IN VITRO, UNDER FIELD CONDITIONS AND DURING THE MICROMALTING PROCESS

MARIA LAURA CHIOTTA; SILVINA ALANIZ ZANON; ANTONIO AGUINAGA; ALEJANDRA GRIBALDO; NADIA YERKOVICH; CANTORO, RENATA; PALACIOS, SOFÍA; JUAN PALAZZINI; SULYOK, MICHAEL; PUNTILLO, M; VINDEROLA G; DUNLAP C.; CHULZE, SOFÍA

Bari

Conferencia; MycoTwin- Mycokey 2021 International conference; 2021

Barley (Hordeum vulgare L.) is the second most important winter crop after wheat inArgentina, and is mainly used for the malt production in beer manufacture. Fusariumspecies, mainly Fusarium graminearum sensu stricto and F. poae, cause FusariumHead Blight (FHB) in barley and produce reductions in quality and safety pre‐harvestand during the malting process due to fungal growth and mycotoxin contamination.The aims of the present study were‐ to evaluate incidence of F. graminearum speciescomplex and F. poae in different barley‐growing regions from Argentina, ‐ todetermine their toxigenic ability, ‐to evaluate the biocontrol activity of B. velezensisRC218 to reduce F. graminearum ss and DON accumulation under field conditionsand during micromalting process ?to select new potential biocontrol agents tocontrol F. graminearum ss and F. poae growth under in vitro conditions. Datashowed that F. graminearum ss was isolated with high incidence in all regions during2016 and 2017 harvest seasons. The chemotype of the strains was DON‐15ADONand DON‐3ADON, also the strains were producers of ZEA and their derivatives. NX‐2chemotype was detected for the first time from strains isolated from barley inArgentina. Fusarium poae was isolated in two regions and were NIV producers,besides other toxins produced by the strains were DAS, NEO, MAS and T2‐tetraol.The application of B. velezensis RC218 in vitro, under field conditions and duringmicromalting process showed reduction of F. graminearum ss fungal growth andDON accumulation. Some new potential biocontrol agents were selected such asLactobacillus plantarum and B. subtillis subsp. inaquasorum.