ISHS Acta Horticulturae 94: XI International Symposium on Fruit Tree Virus Diseases
SELECTION OF TWO APRICOT VARIETIES RESISTANT TO SHARKA VIRUS |
| Author: | G.D. SYRGIANNIDIS |
| Abstract:
From a previous research work of G. Syrgiannidis concerning the sensitivity of apricot varieties to Sharka virus, naturally infected, has been observed that the apricot varieties, Early Orange and Stella did not show any symptom of Sharka disease, though they were for many years in an infected orchard. In order to clear up if the above varieties were resistant or carriers of the disease, they had been grafted on infected trees of the sensitive apricot varieties Caninos and Precoce de Tunisie, which were showing strong symptoms. On the shoots of the varieties Early Orange and Stella grown from this grafting, have been taken observations during 8 years for the eventuality of appearance of symptoms. During all the period of observations the Stella variety did not show any symptom of the disease, neither on leaves nor on fruits, while the Early Orange variety showed slight symptoms on the leaves of certain shoots, only near the point of grafting with the sensitive varieties. Indexing with woody indicators for some years of the above varieties demonstrated that the Stella variety had not been infected from the Sharka virus, while on the Early Orange variety had been detected the presence of the virus on certain shoots and only near the point of grafting with the sensitive variety. It is concluded that the apricovarieties Early Orange and Stella are resistant to Shark a disease. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
