ReTain® PGR harvests the potential of your apple crop as a plant growth regulator that temporarily inhibits ethylene production to slow fruit maturation, ripening and fruit drop.

Technical information

Chemical class: Plant Growth Regulator
Active ingredient: Aviglycine hydrochloride (AVG) 15%
Packaging: 20 x 333 g case
Rainfast: 8 hours
PCP #: 25609

Registered crops

  • Apples
  • Cherries


  • Keeps fruit hanging longer
  • Reduces watercore and stem bowl cracking
  • Maintains and improves fruit firmness
  • Provides greater uniformity in maturity across all fruit at each pick
  • Increases fruit size as fruit grows longer
  • Increased fruit set on cherries

General usage information

  • Adequate spray volume is required for thorough coverage (935 – 1,870 L/ha)
  • A silicone surfactant must be used when applying ReTain – Xiameter® at 0.05-0.1% v/v
  • Use the lower rate of surfactant when trees are stressed, or if there are extreme weather conditions like drought or excessive heat
  • Maximum 1 application per season
  • The spray solution pH should be neutral and not exceed 8.5
  • If applying to trees under stress due to water, heat, disease or poor nutrition – be aware that the benefits and efficacy of ReTain may be reduced in these circumstances
  • Please consult the Horticulture Specialist at Nufarm for specific use pattern information related to specific varieties and growing areas
  • Do not mix ReTain with any other products other than Xiameter
  • Do not apply in high heat
  • We do not recommend applying close application intervals of ReTain and Captan and/or Maestro®. Please contact Nufarm for more details and support with respect to using ReTain and these fungicides safely.