Publication 360, Fruit Production
Recommendations:
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Pub
360: Fruit Production Recommendations > Apples
> Thinning and Plant
Growth Regulators > Promalin or Perlan to Improve Fruit Shape
of Delicious
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Excerpt from Ch. 4, Publication 360, Fruit Production Recommendations 2010-11,
Table
of Contents
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Other Information on Growth Regulators and Thinning
- Other Information on Apples
- Chapter 4: Apple Calendar - PDF 357 kb
- Related Links
Promalin or Perlan to Improve Fruit Shape of
Delicious
Promalin or Perlan are plant growth regulators used on Red Delicious apples. They improve the shape of Red Delicious apples through elongation of the fruit and development of more prominent calyx lobes. They contain a mixture of benzyladenine and two types of gibberellins. For satisfactory results, time the application carefully, follow label directions and ensure complete spray coverage.
Precautions
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If Promalin or Perlan are applied at higher rates or volumes than those recommended on the label or where blooms are weak or frost-injured, fruit thinning may occur. Promalin or Perlan use may also increase the amount of thinning achieved with subsequent blossom thinning sprays.
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Apples may not respond to Promalin or Perlan if spur vigour is low or the king blossoms have been damaged by frost. .
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Do not apply Promalin or Perlan if rain is expected within six hours.
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Do not apply Promalin or Perlan if rain is expected within six hours.
Application notes
For optimum results, spray the first application of Promalin or Perlan between full king bloom and early petal fall. Applications earlier or later are likely to produce unsatisfactory response.
High relative humidity and slow drying conditions favour maximum absorption. It is preferable to apply in morning or evening.
For more information:
Toll Free: 1-877-424-1300
Local: (519) 826-4047
E-mail: ag.info.omafra@ontario.ca
| Author: | OMAFRA Staff |
|---|---|
| Creation Date: | 05 July 2007 |
| Last Reviewed: | 01 November 2010 |