ISHS Acta Horticulturae 579: II Balkan Symposium on Vegetables and Potatoes
EVALUATION OF RESISTANCE OF VARIOUS STRAWBERRY GENOTYPES TO VERTICILLIUM DAHLIAE KLEB. |
| Authors: | V.I. Tahmatsidou, G. Paroussi, D. Voyiatzis |
| Keywords: | Strawberry, genotypes, susceptibility, verticillium |
| Abstract:
Plants from fourteen strawberry genotypes were inoculated with a conidial suspension of Verticillium dahliae Kleb. at 106 conidia/ml. Trials took place in beds in an unheated plastic greenhouse closely resembling field conditions. Disease symptoms were scored on the basis of a phenotypic resistant scale from 1 to 5. Symptoms included leaf wilting, necrosis and sometimes stunting. Leaf fresh weight (LFW) and fruit yield (FY) were scored and compared to controls after a seven-month culture period. Genotypes were classified in three categories: (a) resistant, symptom scale 1-2, LFW and FY 100%: cv. Florence, (b) intermediate, symptom scale 2.1-3.9, LFW 31-55% and FY 45-79%: cvs Vimazanda, Ciloe, Selva and Laguna, (c) susceptible, symptom scale 4-5, LFW 0-23% and FY 0-35%: cvs Tudla, Cilady, Chandler, Camarosa, Vimartada, Onda, Andana, Cingoulette and Elsanta. Three categories were also distinguished on the basis of symptom appearance and two on symptom development. Cvs Camarosa, Chandler, Elsanta, Laguna, Onda and Vimartada started showing symptoms in about two monthts after inoculation, Cilady, Cingoulette and Vimazanda after four months whereas Andana, Ciloe, Selva and Tudla had the first symptoms five months after inoculation. Cvs Andana, Elsanta and Onda developed symptoms more rapidly than all the others. The behavior of genotypes classified as intermediate was not always stable. Further trials should be made for these genotypes as close to realistic field conditions as possible. | |
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