EFFECT OF GROWTH REGULATORS ON TWO PYRACANTHA COCCINEA CULTIVARS
Pyracantha coccinea `Lalandei' and `Kasan' were treated with a foliar application of 25, 50 or 100 mg/l uniconazole, 3000 mg/l chlormequat, a soil drench of 0.25, 0.50 or 1.00 mg/container of uniconazole, or 30 mg/container chlormequat. Heights of plants receiving foliar applications of uniconazole were significantly lower than untreated plants in both cultivars. Uniconazole soil drenches also reduced plant height in both cultivars, but differences were not apparent until 8 weeks after treatment. Chlormequat treatments had little effect on plant growth. At harvest, stem dry weight was significantly lower in both cultivars with uniconazole soil drenches and in `Lalandei' treated with 50 and 100 mg/1 and in `Kasan' treated with 100 mg/1 as a foliar application. There was also a tendency for leaf area to increase with uniconazole foliar applications.