INVESTIGADORES
CONSOLO Veronica Fabiana
artículos
Título:
Occurrence of different species of Fusarium graminearum from wheat in relation to climatic models in Argentina Pampas Region.
Autor/es:
G. E. KIKOT R. MOSCHINI V. F. CONSOLO
Revista:
MYCOPATHOLOGIA
Editorial:
SPRINGER
Referencias:
Año: 2011 vol. 171 p. 139 - 149
ISSN:
0301-486X
Resumen:
Abstract
Fusarium head blight (FHB) is an important
disease throughout many of the world wheatgrowing
areas that have humid to semi-humid
climate. The infection happens mainly during the
anthesis of the wheat, when there have been favorable
conditions of moisture and temperature. The direct
relation of the infection to environmental factors
makes possible the formulation of mathematical
models that predict the disease. The causal agent of
the FHB of the spike of wheat is attributed principally
to Fusarium graminearum. High economic losses due
yield decrease have been recorded in Argentina. In
the present work, 67 isolates of Fusarium spp. were
obtained from samples of wheat grains from Pampas
region from 15 locations distributed in Buenos Aires,
Entre Rı´os, Santa Fe and Co´rboba provinces during
2006 and 2007 wheat-growing seasons. The identification
of species from monosporic isolates was
carried out by morphological characterization and use
of species-specific PCR-based assays. Both identification
criteria were necessary and complementary for
the species determination, since in some cases the
molecular identification was not specific. Scanty
presence of F. graminearum was observed in 2006
wheat-growing season coinciding with the lack of
favorable meteorological conditions for producing
FHB infection events. High presence of F. graminearum
isolates was observed in 2007 wheat-growing
season, in accordance with moderate incidence of the
disease according to spatial distribution of FHB
incidence values. The aim of this report was to
identify the causal agent of the FHB disease by
different taxonomic criteria and to relate its occurrence
with disease incidence values predicted by a
weather-based model in Argentina.