Table 1.
Chilling requirements of peach cultivars as affected by autumn-applied ethephon.
| Cultivar | Treatment | CR x | Date y | Days z | |
|---|---|---|---|---|---|
| Redhaven (P. persica) | Control | 1046 (62.2) | 22 January | 88 | a |
| ET-100 ppm | 1112 (65.9) | 26 January | 92 | ab | |
| ET-300 ppm | 1147 (67.3) | 28 January | 94 | ab | |
| ET-500 ppm | 1177 (67.8) | 29 January | 95 | b | |
| Sunhigh (P. persica) | Control | 805 (46.9) | 28 December | 94 | a |
| ET-10% | 1145 (68.4) | 27 January | 124 | b | |
| ET-50% | 1115 (65.6) | 26 January | 123 | b | |
| ET-100% | 1092 (63.1) | 25 January | 122 | b | |
X Chilling requirements (CR) is displayed as the number of CH and CP (in parenthesis). Y Date at which 50% of buds released from endodormancy. z Number of days from the beginning of chilling accumulation (7 October) until release of endodormancy. All comparisons are made within each cultivar with significant level at 0.05, and significant differences apply to both CH and Days.