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.