|Program Level||Tree Vigour2||# Sprays||1st Spray Petal Fall||2nd Spray Fruit Set||3rd Spray June Drop||4th Spray Growth||Season Total3 (g/ha)|
— = 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.