ISHS Acta Horticulturae 124: III International Symposium on Pear Growing
INCREASE FRUIT SET AND CROPPING OF 'COMICE' PEAR TREES WITH AN ETHYLENE INHIBITOR, AMINO-ETHOXYVINYLGLYCINE |
| Authors: | P.B. Lombard, D.G. Richardson |
| Abstract:
Young 'Comice' trees are notorious for low fruit set and crops. Because of previous success with amino-ethoxyvinylglycine (AVG) on apples to increase fruit set (Williams, 1980), AVG treatments were applied on 7 year old 'Comice' trees at full bloom (FB), 2 weeks after bloom (FB+2), and 4 weeks after bloom (FB+4) at concentrations of 150, 300 and 600 mg/l. Fruit set (FS) and yield efficiency (E) were increased significantly with all concentrations and at all timings with AVG. Greatest FS and E were found with AVG at FB+2 wks. and at the highest concentration. Fruit size and rate of fruit growth was reduced by AVG at FB for all concentrations and at both post-bloom applications at 600 mg/l. All AVG applications caused fruit russeting and leaf injury but the level of injury was related to concentration only. Bloom density was reduced the following year by AVG applied FB+2 at the 2 highest concentrations. Fruit maturity and storage quality of 'Comice' were not influenced by AVG. | |
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