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Influence of olive management systems in the natural suppressiveness of olive orchards soils to the soilborne plant pathogen Verticillium dahliae

AuthorsMontes Borrego, Miguel ; Navas Cortés, Juan Antonio ; Jiménez-Díaz, Rafael M. ; Landa, Blanca B.
Issue Date2011
CitationIOBC/WPRS Bulletin 71: 85-89 (2011)
AbstractOlive (Olea europaea L. subs. europaea) is one of the most important crops in Spain with > 2.4 million ha. During the last two decades phytosanitary status of olive orchards is being threatened due to some diseases caused by soilborne pathogens, mainly Verticillium wilt (VW) caused by Verticillium dahliae (VD) which is steadily increasing both in severity and extension. The main objective of this study was to determine the effect of olive management system on the natural suppressiveness of olive orchards soils to VD and how this may be related with biological and functional indicators of soil quality. An in planta bioassay was developed for assessing the natural s uppressiveness to VD of a collection of 93 soils using highly cond ucive conditions for VW development. Results showed a wide range of variation among the differen t soils in their ability to suppress VD, with 25.8, 49.5 and 24.7% of soils showing low, moderate and h igh suppressiveness according to the VW severity developed in the test plants growing in those soils compared to that developed in plants in sterile and pasteurized artificial soils. Canonical multivariat e discriminant analysis is being used to identify physicochemical, functional or biological indicator s that may be involved in the natural suppression to VD of those soils.
DescriptionPóster presentado en el 6th meeting of the IOBC-WPRS Working Group Multitrophic Interactions in Soil, celebrado en Córdoba (España) del 4 al 7 de abril de 2011.
Identifiersissn: 1027-3115
Appears in Collections:(IAS) Artículos
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