Fecha/hora: 11/06/2024 07:26:58

Biblioteca(s): | INIA Las Brujas.
Fecha corriente: | 10/09/2014
Fecha de la última actualización: | 15/10/2019
Autoria: | LEONI, C.; DE VRIES, M.; TER BRAAK, C.J.F.; VAN BRUGGEN, A.H.C.; ROSSING, W.A.H.
Afiliación: | CAROLINA LEONI VELAZCO, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay.
Título: | Fusarium oxysporum f.sp. cepae dynamics: In-plant multiplication and crop sequence simulations.
Año de publicación: | 2013
Fuente/Imprenta: | European Journal of Plant Pathology, 2013, v.137, no.3, p.545-561.
ISSN: | 0929-1873
DOI: | 10.1007/s10658-013-0268-6
Idioma: | Inglés
Notas: | Article history: Accepted: 1 August 2013 / Published online: 23 August 2013.

Contenido:

ABSTRACT.

To reduce Fusarium Basal Rot caused by Fusarium oxysporum f.sp. cepae (Foc) through crop rotation, plant species should be selected based on Foc multiplication in their roots. Foc multiplication rates in 13 plant species were tested in a greenhouse. All plant species enabled Foc multiplication. The lowest Foc levels (cfu g&#8722;1 dry root) were found for wheat, sunflower, cowpea and millet, the highest for black bean. The highest Foc levels per plant were calculated for sudan grass. These data were used to calibrate the model Pf=Pi/(&#945;+&#946;Pi) relating final (Pf) and initial (Pi) Foc levels in the soil. The rate of population increase at low Pi (1/&#945;) was highest for onion and black oat and smallest for sunflower. The pathogen carrying capacity (1/&#946;) was highest for black oat and black bean, and lowest forwheat, cowpea and foxtail millet. Foc soil population dynamics was simulated for crop sequences by concatenating Pi-Pf values, considering instantaneous or gradual pathogen release after harvest. Different soil Foc populations were attained after reaching steady states. Foc populations in the sequence onion ?foxtail millet - wheat ? cowpea were 67 % lower than in the sequence onion ? sudan grass - black oat - black beans. In this work, by combining detailed greenhouse experiments with modelling, we were able to screen crops for their ability to increase Foc population and to explore potential crop sequences that may limit pathogen build-up.
© 2013 KNPV.

Thesagro: | DINÁMICA DE POBLACIONES; FUSARIUM; MODELOS DE SIMULACIÓN; RELACIONES HUÉSPED-PARÁSITO.
Categoría del tema: | F40 Ecología vegetal
Registro original: | INIA Las Brujas (LB)
Ejemplares: | LB - (100042-1) - PXI - AP - DD - PP/EUROPEAN JR.PLANT PATHOL./2013 -  -  - DIS