Estimation of spore dispersal kernel in Mycosphaerella Fijiensis from one-generation disease gradients

Rieux Adrien, Soubeyrand Samuel, Bonnot François, Carlier Jean, Ravigné Virginie, Klein E., Ngando Essoh Otto Josué, Mehl Andréas, De Lapeyre de Bellaire Luc. 2013. Estimation of spore dispersal kernel in Mycosphaerella Fijiensis from one-generation disease gradients. In : Proceedings of the 20th international meeting ACORBAT: 40 years sharing science and technology, Fortaleza, Brazil, 9-13 september 2013. eds. Borges A.L. , Lichtemberg L. s.l. : s.n., 286. Reunion internacional ACORBAT 2013. 20, Fortaleza, Brésil, 9 Septembre 2013/13 Septembre 2013.

Titre espagnol : Adaptacion del sistema de preaviso biologico para el control de la sigatoka negra en las condiciones específicas de Republica Dominicana

Résumé : We report two field experiments aiming to independently measure dispersal distances of both sexual and asexual spores of the devastating wind-dispersed banana plant pathogen fungus Mycosphaerella fijiensis .Disease gradients were assessed during a single generation of the pathogen and over a large number of traps installed up to 1000 m along eight directions radiating from a traceable source of inoculum com posed of QoI-resistant strains. Ascospores dispersed at an average distance of 160 m and their dispersal kernel displayed a heavy tail with both a steep gradient in the first few metres of each direct ion and rare long-distance dispersal (LDD) events up to 1000 m from the source. Conidia dispersed at an average distance of 4 m according to a thin-tailed kernel with no LDD since no conidia were trapped over 12,5 m.

Classification Agris : H20 - Maladies des plantes

Auteurs et affiliations

• Rieux Adrien, University of Manchester (GBR)
• Soubeyrand Samuel, INRA (FRA)
• Bonnot François, CIRAD-BIOS-UMR BGPI (FRA)
• Carlier Jean, CIRAD-BIOS-UMR BGPI (FRA) ORCID: 0000-0002-6967-1852
• Ravigné Virginie, CIRAD-BIOS-UMR BGPI (REU) ORCID: 0000-0002-4252-2574
• Klein E., INRA (FRA)
• Ngando Essoh Otto Josué, CARBAP (CMR)
• Mehl Andréas, Bayer CropScience (DEU)
• De Lapeyre de Bellaire Luc, CIRAD-PERSYST-UPR Systèmes de culture bananes et ananas (FRA) ORCID: 0000-0003-1243-0887

Source : Cirad - Agritrop (https://agritrop.cirad.fr/571450/)

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