RT Conference Proceedings T1 Suppressive ability against Rosellinia Necatrix of agricultural soils A1 Vida Hinojosa, Carmen María A1 Bonilla, Nuria A1 Calderón, Claudia E. A1 Crespo-Gómez, José Ignacio A1 Cazorla-López, Francisco Manuel A1 De-Vicente-Moreno, Antonio K1 Plagas agrícolas - Control biológico K1 Suelo agrícola AB The use of organic soil amendments to enhance the suppressiveness of natural soils has beenproposed as an additional strategy to control plant diseases. Avocado is one of the mainsubtropical crops in southern Spain and white root rot, caused by the fungus Rosellinia necatrix,one of the most serious problems. Previous studies on this pathosystem have shown thatapplication of composted almond shells caused a change in soil microbial communities of bothpopulation and functional level. In this work, evaluation of the suppressive capacity of almondshells amended soils have performed. “In vitro” assays using two different susceptible plants,Persea americana (avocado) and Triticum aestivum (wheat), indicate a clear relationshipbetween soil microbial communities and suppressiveness. Addition of composted almond shellsto the agricultural soil resulted in increased suppressiveness against R. necatrix, directlyassociated to microbial components, since suppressiveness was reduced when the soil waspasteurized, and partially recovered when the pasteurized soil was complemented with fieldsoil. Different strains producing antifungal compounds were correlated with suppressiveness bymolecular approaches. YR 2014 FD 2014-07-16 LK http://hdl.handle.net/10630/7855 UL http://hdl.handle.net/10630/7855 LA spa NO Comunicación a congreso internacional NO Universidad de Málaga, Campus de Excelencia Internacional Andalucía Tech. Plan Nacional I+D+I from Ministerio de Economía (MINECO,Spain) (AGL2011-30354-C02-01) and co-financed by FEDER funds (EU). C. Vida wassupported by a PhD fellowship from the FPI program of MINECO. DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 19 ene 2026