| Program Level | Tree Vigour2 | # Sprays | 1st Spray Petal Fall | 2nd Spray Fruit Set | 3rd Spray June Drop | 4th Spray Growth | Season Total3 (g/ha) |
| 1 | low | 1 spray | 450 | — | — | — | 450 |
| 2 | low | 2 sprays | 270 | 270 | — | — | 540 |
| 3† | medium | 2 sprays | 450 | 450 | — | — | 900 |
| 4 | medium/high | 3 sprays | 450 | 450 | 270 | — | 1170 |
| 5 | high | 3 sprays | 450 | 450 | 450 | — | 1350 |
| 6 | high | 4 sprays | 450 | 450 | 450 | 270 | 1620 |
— = No activity or activity unknown.
† Suggested base rate. Move to next higher level if there is a low crop load, for fire blight suppression, or if there was heavy pruning. Visit ontario.ca/apples and click on Plant Growth Regulators for Fruit Crops.
1 Tree-row volume (see sprayers101.com and Airblast 101: A Handbook of Best Practices in Airblast Spraying for more details). Rates need to be increased when higher water volumes are required for adequate spray coverage.
2 Vigour is defined as the total amount of shoot growth in a single season, not to be confused with tree-row volume.
3 Maximum seasonal rate should not exceed a total of 5.4 kg of product per ha.