BASF·Growth Regulators
Medax Top
Medax Top is a growth regulator with mepiquat chloride and prohexadione-calcium in a suspension concentrate against lodging of wheat and barley, also for winter oilseed rape and sunflower.
Main advantages
- From +5 °C in the daytime — the lower temperature limit for use
- Up to two treatments — stem elongation and flag leaf
- Crops thinned after winter — 0.5 l/ha until mid-tillering
- Turbo 1:1 is added first — the tank filling order
Overview
About this product
Medax Top is a growth regulator with mepiquat chloride 300 g/L and prohexadione-calcium 50 g/L in a suspension concentrate. The product is systemic: it regulates the growth of wheat and barley against lodging and promotes root system development and productive tillering.
The rate is 0.5–1.5 l/ha, up to two treatments: at the start of stem elongation and when the flag leaf appears, and on crops thinned after overwintering 0.5 l/ha from three leaves to mid-tillering. Winter oilseed rape and sunflower are treated at 0.5–1.0 l/ha.
Turbo (ammonium sulphate) is added to the tank first, 1:1.
Application
Rate, timing and crops
- Rate
- Wheat, barley 0.5–1.5 l/ha
- winter oilseed rape, sunflower 0.5–1.0 l/ha
- together with Turbo 1:1
- Timing
Wheat and barley: on crops thinned after overwintering 0.5 l/ha from three leaves to mid-tillering; at a nitrogen supply of N60–90 one treatment of 0.5–1.0 l/ha at the start of stem elongation or when the flag leaf appears; at N100–200 and on tall varieties of winter wheat two treatments of 0.5–0.7 l/ha each, at the start of stem elongation and when the flag leaf appears.
Minimum daytime temperature during application +5 °C.
- Crops
- Winter wheatSpring wheatWinter barleySpring barleyWinter oilseed rapeSunflower
Figures from the manufacturer, BASF. Source page
Register rates
State register, entry 15833
0,5 - 1,5 л/га препарату + 0,5 - 1,5 кг/га Турбо (Сульфату амонію) - пшениця озима та яра, ячмінь озимий та ярий 0,5 - 1,0 л/га препарату + 0,5 - 1,0 кг/га Турбо (Сульфату амонію) - ріпак озимий, соняшник
As printed in the register.
Source: State register of pesticides and agrochemicals, file of 19.10.2026.
Specifications
Active ingredients and formulation
| Type | Growth Regulator |
|---|---|
Active ingredients
| |
| Formulation | SC · suspension concentrateUkrainian label code КС |
| Target Crops | Winter wheat, Spring wheat, Winter barley, Spring barley, Winter rapeseed, Sunflower |
| Mode of action | Mepiquat chloride inhibits the early steps of gibberellin biosynthesis and prohexadione-calcium the final step, the formation of their active forms, so the stem cells elongate less. Both actives move systemically in the plant. |
| Hazard class | Class 2 · highly hazardous |
| Registration | Registered until 31.12.2032Certificate А 10128 · register entry 15833 |
| Registrant | BASF Agricultural Solutions Deutschland GmbH (Germany) |
| Manufacturer | BASF |
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Questions & answers
What farmers ask most
- Yes. The State register lists this product as registered in Ukraine until 31.12.2032. The certificate and the register entry are in the Specifications table.
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