PSHS main page    Folia Horticulturae

Current issue content   Search      

Differences in the resistance of carrot lines and cultivars to carrot fly [Psila rosae (Fabr.)] attack

Barbara Michalik*, Kazimierz Wiech**

**Department of Genetics, Plant Breeding and Seed Science
**Department of Plant Protection
**Faculty of Horticulture, University of Agriculture in Kraków
**29 Listopada 54, 31-425 Kraków, Poland

Two-year studies (1998-1999) on the degree of carrot root damage were carried out in the field in the Rzeszów region. Twenty-nine lines and cultivars of different origin were included in the study. On the basis of the percentage of roots damaged by carrot fly larvae and the calculated susceptibility index, groups of five accessions resistant and five accessions very susceptible to the pest were distinguished, the differences between them being statistically significant. The remaining accessions could be put into two groups, six of them being tolerant and thirteen susceptible. However, differences between them were not significant. Lines HRI 96367 and HRI 96350, originating from the resistance breeding programme carried out at the Horticulture Research International, Wellesbourne, UK, as well as American lines 0-493, 7262A, and 7262B, the latter two characterized by a red root colour, appeared to be the most resistant. The lines with red roots were examined for the first time in terms of their resistance to carrot fly and it was important to find out if they might become a potential new source of resistance. Three European cultivars and the local Asian variety Mirzoj were the most susceptible to carrot fly.

Michalik B., Wiech K., 2000. Differences in the resistance of carrot lines and cultivars to carrot fly [Psila rosae (Fabr.)] attack. Folia Horticulturae 12/2: 43-51.