INVESTIGADORES
MORENO Maria Virginia
artículos
Título:
Tan spot of wheat (Ttriticum aestivum L.) infection at different stages of crop development and inoculum type.
Autor/es:
PERELLÓ, A. E.; MORENO, M. V.; SIMÓN, M. R.; SISTERNA, M.N.
Revista:
CROP PROTECTION
Editorial:
Elsevier
Referencias:
Año: 2003 vol. 22 p. 157 - 169
ISSN:
0261-2194
Resumen:
The incidence, severity and progress of tan spot (Pyrenophora tritici-repentis)
of wheat under different inoculum types were analysed during 2000 and
2001 in two different environments of Buenos Aires Province. Severity,
incidence and area under the disease progress curve (AUDPC) were higher
in 2001 than in 2000. Inoculum as spore pulverization treatments of Drechslera tritici-repentis
occasioned higher disease severity than the application of oat grains
colonized with the pathogen at low or high inoculum concentration.
Severities increased with the growth stage of wheat plants. In both
environments severity was higher when the evaluation was performed at
14 days compared to 7 days after inoculation. The combined analysis for
incidence and severity showed significant differences between all main
factors and the interactions except the quadruple for incidence and
environment×evaluation date and environment×growth stage×evaluation
date for severity. For the AUDPC all main factors and interactions were
significant except environment×evaluation date. Due to the significant
interactions with the environment both years were analysed separately.
For the separate analysis, incidence, severity and AUDPC increased with
the growth stage and evaluation date in both years. The severity and
AUDPC increased for the spore pulverization treatment with respect to
oat grain application. For incidence there were differences between
both treatments only in 2000 environment. Furthermore, the highest rate
of spore pulverization caused a higher severity and AUDPC than the
lowest rate. However, there were no differences for incidence between
doses.