ISHS Acta Horticulturae 701: XII International Symposium on Apricot Culture and Decline
BEHAVIOUR OF SOME APRICOT AND HYBRIDS FROM NATIONAL COLLECTION TO THE MONILINIA LAXA (ADERH ET RUHL) HONEY INFECTION |
| Authors: | M. Trandafirescu, G. Teodorescu |
| Keywords: | Prunus armeniaca, cultivar, resistance, mycelium, fungus, moniliosis |
| Abstract:
The climatic conditions in south-eastern Romania as a result of the influence of the Black Sea are remarkably favourable to the attack against the flowers by one of the most damaging cryptogamic disease of the apricot tree, produced by the fungus Monilinia laxa. The study of apricot varieties and hybrids behaviour against the attack of this pathogen agent the main element in chosing the parents in breeding work. So, it is necessary to evaluate if the new varieties that are disease resistant. For this purpose a test of rapid selection of increased resistance has been devised (after Crossa-Raynaud). This test which consists in the artificial contamination of undetached tree-branches with the mycelium of the fungus reduces the observation and research time with 3-4 years compared to the selection in the conditions of natural infection. By measuring the length of the canker obtained for each variety and selection that was tested and by comparing with increased resistance controls (‘Marculesti 14’ × ‘Baneasa 28/25’) the 40 varieties and hybrids which were tested were divided into four classes of resistance. The interpretation of the results demonstrates that the resistance is statistically assured only the varieties and the hybrids appreciated as tolerant (T) to the attack of the pathogen agent. In this class of resistance the following varieties and hybrids were included: ‘NJA 548’; ‘Jaubert Foulon’; ‘Umberto’; ‘Baneasa 33/11’; ‘Tonda di Tossignano’; ‘Sirena’; ‘Mamaia’ and ‘Sulmona’. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
