Work

Influence of Nitrogen Supply on the Susceptibility of Wheat to Septoria tritici

Year: 2003

Type: article

Abstract: Nitrogen (N) fertilization is required for achieving high yields in wheat (Triticum aestivum L.) but may enhance the development of Septoria tritici Rob. ex Desm. A study was undertaken to investigate how N supply influences the area under disease progress curve (AUDPC). Two field experiments were carried out in a typical argiudol in 1996 and 1997. Six cultivars were grown at two N treatments (0 and 100–150 kg N/ha) in a split plot design. Percentage of necrosis (severity) of the two upper leaves of each treatment was evaluated three times during the growing season. Height and heading date were also scored and related to the resistance level. In 1996, with weather conditions conducive to the disease, AUDPC values were higher in the fertilized treatment. In 1997, with insufficient rain immediately after inoculation, the disease only progressed faster under N fertilization in the flag leaf, which was exposed to conducive environmental conditions from its appearance. The effect of N fertilization was influenced by the cultivar characteristics, climatic and agronomic conditions. Knowledge that N fertilization promotes the development of S. tritici in conducive conditions will be useful for deciding management strategies of the cultivars and for optimizing conditions for the selection in breeding programmes.

Source: Journal of Phytopathology

DOI: 10.1046/j.1439-0434.2003.00720.x

Authors: M. R. Simón, C. A. Cordo, A. E. Perelló, P. C. Struik

Institutions: Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigaciones en Fitopatologías, Universidad Nacional de La Plata, Wageningen University & Research

Language: English

Topic: Wheat and Barley Genetics and Pathology

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: green

Funder: Consejo Nacional de Investigaciones Científicas y Técnicas