Occurrence of Didymella fabae, the Teleomorph of Ascochyta fabae, on Faba Bean Straw in Spain

Authors: RUBIALES, D.¹; TRAPERO-CASAS, A.²

Source: Journal of Phytopathology, Volume 150, Number 3, March 2002 , pp. 146-148(3)

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Abstract:

Pseudothecia of Didymella fabae, the teleomorph of Ascochyta fabae, were first observed on faba bean (Vicia faba) debris in Spain during autumn 1995. Most pseudothecia were mature by December-February. The ascospores gave rise to typical cultures of A. fabae, and conidia from these cultures caused ascochyta blight symptoms on inoculated faba bean plants. Placing straw-bearing pseudothecia over the plants to allow ascospore discharge also resulted in typical ascochyta blight symptoms. Pseudothecia maturity and discharge of ascospores from the infested faba bean straw overlapped with the vegetative stage of the faba bean crop, which occurs in southern Spain during winter as the crop is sown in autumn and harvested in spring. These observations indicate that ascospores may serve as primary inoculum for the disease.

Keywords: Vicia faba; Ascochyta blight; epidemiology; pathogen survival

Document Type: Short communication

DOI: http://dx.doi.org/10.1046/j.1439-0434.2002.00727.x

Affiliations: 1: Instituto de Agricultura Sostenible, CSIC, Apdo. 4084, 14080 Córdoba, Spain, 2: Departamento de Agronomía, ETSIAM, Universidad de Córdoba, Apdo. 3048, 14080 Córdoba, Spain

Publication date: 2002-03-01