ISHS Acta Horticulturae 224: Fruit Breeding
BREEDING FOR ARTHROPOD RESISTANCE IN APPLE |
| Authors: | R.C. Lamb, Susan K. Brown, W.H. Reissig |
| Abstract:
About 300 different cultivars of species, ornamental crab-apples, numbered selections and commercial varieties were turned over to the search for resistance to apple maggot Rhagoletes pomonella. There were wide and statistically significant differences in the ovipositional preference of apple maggot between cultivars in the field tests and in the "free-choice" and "no choice" tests in the laboratory. There is considerable resistance to apple maggot in fruit of 'Henry F. Dupont', 'Frettingham', 'Fuji', 'Vilmorin' or Maluszumi calocarpa. There was a correlation of .92 and .94 between small fruit size and low numbers of ovipositional punctures in the July and August tests. In a further study of field infestation 44 out 156 cultivars had no punctures in a sample of 25 fruit per cultivar. An additional 19 cultivars had fewer than 5 punctures. These are being studied further. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
