ISHS Acta Horticulturae 94: XI International Symposium on Fruit Tree Virus Diseases
SYSTEM OF VIRUS ELIMINATION BY THERMOTHERAPY IN FRUIT TREES |
| Authors: | S. ACHMET, J. VÉRTESY, M. WEBER |
| Abstract:
Several years of virus indexing have shown that most of the important fruit tree varieties cultivated in Hungary are infected by viruses. Heat therapy was introduced in 1972 as a means of producing virusfree material. In some cases heat therapy is combined with mersitem culture. Heat treated plant material is maintained under insect proof cages for 2 years, after which it is screened by several rapid biological tests and by indexing on the standard series of woody indicators. Simultaneously treated and tested plants are propagated in a screening nursery, from where they are transplanted to a central nuclear stock if they prove to be virus free. Two plants of each heat treated cultivar are kept in insect proof cages. So far 14 cultivars have been propagated after thermotherapy. | |
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