Table 4.
Comparison of titratable acids (TA%) and concentration of citric, malic, shikimic, succinic and total organic acids (ug/ml) in juice of ripe ‘Albion’ strawberry fruit treated with Harvista (1-MCP), Ethephon or water at four development stages (Green, White, Pink and Red) plus an absolute control (No Dip).
| Stage | Treatment | TA | Organic acid concentration (ug/mL) | ||||
|---|---|---|---|---|---|---|---|
| Citric acid | Malic acid | Succinic acid | Shikimic acid | Total acids | |||
| – | NoDip | 1.03 | 2410 | 850 | 360 | 18.2 | 3350 |
| Green | 1-MCP | 1.05 | 2220 | 799 | 324 | 17.2 | 3420 |
| Ethephon | 1.00 | 2230 | 834 | 335 | 18.6 | 3400 | |
| Water | 1.13 | 2270 | 783 | 331 | 16.9 | 3410 | |
| White | 1-MCP | 1.04 | 2350 | 770 | 270 | 16.4 | 3450 |
| Ethephon | 1.08 | 2320 | 802 | 307 | 17.0 | 3260 | |
| Water | 1.05 | 2290 | 709 | 236 | 19.6 | 3190 | |
| Pink | 1-MCP | 1.03 | 2090 | 772 | 316 | 16.9 | 3520 |
| Ethephon | 1.07 | 2360 | 835 | 311 | 14.9 | 3690 | |
| Water | 0.953 | 2450 | 877 | 347 | 19.1 | 3490 | |
| Red | 1-MCP | 1.06 | 2360 | 839 | 278 | 19.3 | 3620 |
| Ethephon | 1.12 | 2430 | 834 | 333 | 19.0 | 3710 | |
| Water | 1.06 | 2530 | 868 | 288 | 19.8 | 3630 | |
| Grand Mean | 1.05 | 2330 | 813 | 311 | 17.9 | 3470 | |
| SEM | 0.032 | 178 | 51.7 | 41.3 | 2.22 | 204 | |
| F probability | |||||||
| Main effects | Stage | NS | NS | NS | NS | NS | 0.014 |
| Dips | NS | NS | NS | NS | NS | NS | |
| Stage x Dips | NS | NS | NS | NS | NS | NS | |
| Contrasts | G,W vs P,R | NS | NS | 0.072 | NS | NS | NS |
| P vs R | 0.023 | NS | NS | NS | NS | 0.002 | |
NS, No significant difference (P > 0.10).