PCP #33010 · Fine Agrochemicals Limited · Growth Regulator
Plant growth regulator containing prohexadione calcium for vegetative growth control in apples and cherries, fire blight suppression in apples, and runner initiation suppression in strawberries. Wettable granule formulation applied as dilute or concentrate spray.
Crop × pest × application rate combinations from the official label. Rates converted to per-acre. PHI is the pre-harvest interval; REI is the restricted-entry interval. Always confirm against the official label PDF before applying.
| Crop | Target | Rate | PHI | REI |
|---|---|---|---|---|
| Apple | Fire blight suppression (shoot blight) | 546 g/acre | 45 d | 12 d |
| Apple | Vegetative growth control (shoot growth reduction) | 328–546 g/acre | 45 d | 12 d |
| Cherry | Vegetative growth control (shoot growth reduction) | 546 g/acre | 20 d | 12 d |
| Strawberry | Runner initiation suppression | 54.6 g/acre | 21 d | 12 d |
Adjuvant requirements, compatibility notes, and mixing restrictions from the official label. Always confirm against the official label PDF before mixing.
| Guidance | Adjuvant | Rate |
|---|---|---|
| Required | AMS (ammonium sulfate) Kudos 27.5 WDG must be applied with ammonium sulphate (AMS) at a ratio of 1:1 to Kudos 27.5 WDG if the water source used for spray applications contains high levels of calcium (hard water). | 1:1 ratio to Kudos 27.5 WDG |
| Recommended | AGRAL 90 Use a standard spray adjuvant, preferably a non-ionic surfactant (e.g., Agral 90) at a rate of 0.5 mL/L or 0.05% v/v | 0.5 mL/L or 0.05% v/v |
| Recommended |
| HiActivate® NIS Recommended in conditions where uptake would be reduced: drought conditions, low humidity, hot temperatures, or particularly lush growth |
| – |
| Recommended | AMS Mixing Order: ... 2. Add Ammonium Sulfate (AMS) | – |
| Recommended | AMS (ammonium sulfate) For consistent performance on apples, add one kilogram of a spray grade ammonium sulfate (AMS) for every kilogram of Kudos 27.5 WDG. | 1 kg AMS per 1 kg of Kudos 27.5 WDG (1:1 ratio) |
| Recommended | AMS (ammonium sulfate) For consistent performance on cherries, add one kilogram of a spray grade ammonium sulfate (AMS) for every kilogram of Kudos 27.5 WDG. | 1 kg AMS per 1 kg of Kudos 27.5 WDG (1:1 ratio) |
| Recommended | non-ionic surfactant Use a standard spray adjuvant, preferably a non-ionic surfactant, to improve leaf coverage and performance consistency. | – |
| Recommended | non-ionic surfactant The use of a non-ionic surfactant and ammonium sulphate conditioner is recommended. | – |
| Recommended | AMS (ammonium sulfate) The use of a non-ionic surfactant and ammonium sulphate conditioner is recommended. | – |
| Compatible | AGRAL 90 Kudos 27.5 WDG can be applied with non-ionic adjuvants (e.g., Agral 90) at a rate of 0.5 mL/L or 0.05% v/v in conditions where uptake of prohexadione-calcium would be reduced such as drought conditions, low humidity, hot temperatures or if particularly lush growth is present. | 0.5 mL/L or 0.05% v/v |
| Do not mix | calcium (including gypsum) or boron sprays DO NOT tank mix Kudos 27.5 WDG with calcium (including gypsum) or boron sprays, as a reduction in growth control may result. | – |
About this content. This page presents the official PRD label as published by Health Canada's Pesticides Regulatory Directorate (formerly the Pest Management Regulatory Agency), the source of record. Always read the official label and consult your provincial pesticide- application authority before use. Report an error.
