ISHS Acta Horticulturae 825: I Balkan Symposium on Fruit Growing
CHONDROSTEREUM PURPUREUM (PERS. EX. FR.) POUZAR-SENSITIVITY OF SOME APRICOT VARIETIES |
| Authors: | L. Ivanova, M. Dimitrova |
| Keywords: | Prunus armeniaca, Chondrostereum purpureum, varieties, sensitivity |
| Abstract:
Chondrostereum purpureum (Pers. ex. Fr.) Pouzar is a fungus that causes the serious and hard to control disease “silver leaf” on both seed-trees and stone-trees species. It is one of the most important pathogens producing the apricot tree apoplexy. Its extensive and increasing damage lately led to a study of susceptibility to disease of some apricot varieties: ‘Hungarian best’, ‘Stark early orange’, ‘Kishinevskii rannii’, ‘Murculeshti 19’, ‘Silistrenska kompotna’ and ‘Roxana’. The study was conducted on five-year-old trees chosen in an apricot plantation in Silistra province during the period March-June 2004. Testing was done by artificial inoculation with mycelium round disk inoculum. The inoculations were performed on the trunk 15-20 cm above the soil surface and on the scaffold branches, detaching the bark and applying mycelium discs on the fresh wounds after cutting. Each trial included 5 trees and we had 5 non-inoculated control trees per variety. The evaluation of resistance or susceptibility to infection was done according to an international scale ranging 0-5 (%) estimating variety susceptibility as: resistant, tolerant, certain resistant, medium resistant, sensitive and very sensitive. Results indicated a significant difference of disease intensity related to apricot varieties and ‘Hungarian best’ and ‘Kishinevskii rannii’ varieties to be very sensitive, ‘Roxana’ variety as sensitive, ‘Stark early orange’, ‘Murculeshti 19’ and ‘Silistrenska kompotna’ varieties as tolerant. | |
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