Application of hot callus and epicotyl grafting methods in walnut propagation

Experiments with the application of the new hot callus and epicotyl grafting methods were carried out at the Fruit Growing Institute - Plovdiv, Bulgaria. The paper treats the use of both methods in walnut propagation under production conditions. All the elements and principles of the technological process are described in detail. One-year-old seedlings of Juglans regia L. were used as rootstocks. Grafting was performed with 'Izvor 10' cultivar. The percentage of the successfully propagated plants depended on the grafting method. The results showed that the successfully propagated walnut plants were 85.5% in the hot callus method and 71.0% in the epicotyl grafting. The conclusion was drawn that both methods are suitable for walnut propagation in commercial nurseries.