Effects of nitrogen and water on premature ripening caused by Phoma macdonaldii, a fungal pathogen of sunflower - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Conference Papers Year : 2009

Effects of nitrogen and water on premature ripening caused by Phoma macdonaldii, a fungal pathogen of sunflower

Abstract

Premature ripening (PR) caused by Phoma macdonaldii results in yield damage for sunflower, mainly in the SouthWest of France, a major production area. The aim of the study was to characterize and identify the effect of crop management systems on PR incidence and severity, in 2006 and 2007. This field study used artificial and natural inoculation to investigate the role of host resistance, N-fertilization and water regime in the Phoma epidemics and aimed to reveal the most critical factors responsible for the disease progress and plant injury. On both years, the susceptibility of the cultivar appeared as a main factor influencing PR. However, the most severe attacks were observed in conditions of high nitrogen nutrition, especially when it was associated with water stress after flowering.
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Dates and versions

hal-03960515 , version 1 (27-01-2023)

Identifiers

  • HAL Id : hal-03960515 , version 1

Cite

Celia Seassau, Emmanuelle Mestries, P Debaeke, Grégory Dechamp-guillaume. Effects of nitrogen and water on premature ripening caused by Phoma macdonaldii, a fungal pathogen of sunflower. 9th International Conference on Plant Diseases, Association Française de Protection des Plantes, Dec 2009, Tours, France. pp.347-356. ⟨hal-03960515⟩
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