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Growth Regulators


A growth regulator for use in winter and spring wheat, winter and spring barley, winter and spring oats, durum wheat, rye, triticale, and ryegrass seed crops.

STEMPER® Packshot

Tank Mix data

General Info

Key Benefits

  • Novel formulation facilitates rapid uptake of trinexapac-ethyl for improved performance with good rain fastness  
  • Early applications are less temperature sensitive than chlormequat
  • Treatments at the beginning of stem extension reduce crop height and strengthen stems for reduced lodging risk

Crop Information 

Crop Rate of use (L/ha) Timing
Winter Wheat 0.6 Between tillers erect stage and the flag leaf fully emerged stage(GS 30-39)
Spring Wheat 0.6 Between tillers erect stage and the second node detectable stage(GS 30-32)
Winter Barley




At 0.6 litres product/ha
Between tillers erect stage and second node detectable stage (GS 30-32)

At 0.9 litres product/ha 
Between flag leaf just visible and flag leaf fully emerged stages (GS 37-39)

Spring Barley 0.7 Between tillers erect stage and 2nd node detectable (GS 30-32)
Winter and Spring Oats 0.6 Between tillers erect stage and 1st node detectable (GS 30-31)
Durum Wheat, Rye and Triticale 0.6 Between tillers erect stage and 2nd node detectable (GS 30-32)
Ryegrass seed crops 1.1 Between tillers erect stage and 1st node detectable (GS 30-31)

For all cropping information download the product label. 

Product Information

Application Information

Water volume
Apply STEMPER in 200-400 L/ha water. The higher water volume may be used if the crop is dense and increased penetration of spray is required. Apply as a MEDIUM (BCPC definition) quality spray.

Mixing and spraying
For use by tractor mounted/trailed sprayers only.
Half fill the spray tank with water and begin agitation. Add the required quantity of STEMPER. Add the remainder of the water and continue agitation until spraying is complete.

Spray tank cleaning
Thoroughly wash all spraying equipment and measuring equipment with water and a wetting agent using an integrated pressure rinsing device or manually rinsing three times immediately after use.


Crop Cautions

  • Avoid spray drift onto neighbouring crops. 
  • Only use on crops at risk of lodging.
  • Do not apply if rain or frost is expected or if the crop is wet.
  • Do not spray crops under stress or to crops suffering from water logging, pest attack, disease or frost.
  • Take particular care to avoid overlapping of sprayed strips.
  • Treatment may lead to cereal ears remaining erect through to harvest.
  • Crops should not be re-entered until spray residues are dry.

Technical Helpline

Technical Helpline: 01635 876 622

STEMPER® is a registered trademark of ADAMA Agricultural Solutions UK Ltd.

Use plant protection products safely. Always read the label and product information before use.