Is the host range of Alternaria dauci restricted to carrot?

TitreIs the host range of Alternaria dauci restricted to carrot?
Type de publicationCommunication
TypeCommunication avec actes dans un congrès
Date du colloque17-19/09/2014
Titre du colloqueInternational Symposium on Carrot and Other Apiaceae
Titre des actes ou de la revueActa Horticulturae
AuteurBoedo, Cora, Benichou, Soumaya, Berruyer, Romain , Bersihand, Stéphanie, Dongo, A., Simoneau, Philippe, Lecomte, Mickaël, Briard, Mathilde, Le Clerc, Valérie, Poupard, Pascal
EditeurInternational Society for Horticultural Science
Mots-clésalternaria leaf blight, Apiaceae, Daucus carota L., disease management
Résumé en anglais

The host range of Alternaria dauci was investigated in a greenhouse. Two strains were inoculated onto nine cultivated Apiaceae species, two wild Daucus species and six cultivated non-Apiaceae species representing six botanic families. Lesions of various intensities were observed on all dicot species, but no symptoms developed on the two monocots studied. Typical A. dauci conidia were observed after in vitro incubation of necrotic leaves. Fungal strains were isolated from lesions and A. dauci was diagnosed on the basis of conidium morphology and specific conventional PCR findings. Genotyping of individual isolates performed with microsatellite markers confirmed the presence of the inoculated strain. Our results strongly suggest that species other than carrot can be alternative hosts. Those results are important to consider for a better management of Alternaria leaf blight in carrot fields.

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