Folia Horticulturae

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A laboratory petiole assay of carrot susceptibility to Alternaria radicina

Dariusz Grzebelus, Rafał Barański, Ewa Reby

Department of Genetics, Plant Breeding and Seed Science
Faculty of Horticulture, University of Agriculture in Kraków
29 Listopada 54, 31-425 Kraków, Poland
e-mail: dgrzebel@ogr.ar.krakow.pl

The research aimed at development of a reliable laboratory assay for screening carrot susceptibility to Alternaria radicina. Basal parts of petioles detached from fully developed carrot leaves were inoculated with growing mycelium. Daily measurements of lesion length were carried out from the 2nd to 7th day of the assay. The most discriminating results were obtained on the 6th day of the assay. The petiole assay successfully differentiated carrot stocks, regarding their susceptibility to A. radicina, and was more reliable than the field evaluation of foliage infestation.

Grzebelus D., Barański R., Reby E., 2003. A laboratory petiole assay of carrot susceptibility to Alternaria radicina. Folia Horticulturae 15/2: 41-48.