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Blueberry flower-bud hardiness is not estimated by differential thermal analysis.

Author(s) : FLINN C. L., ASHWORTH E. N.

Type of article: Article

Summary

Differential thermal analysis was used to study the freezing behaviour of "Berkeley" blueberry (Vaccinium corymbosum L.) flower buds at cooling rates of 10, 5, and 2 K/hour. Experiments were conducted at various stages of hardiness on excised and attached (5 cm of stem) buds. The presence and number of low-temperature exotherms in hardy buds generally increased when analyses were conducted using faster cooling rates with excised buds. The number of low-temperature exotherms detected in individual buds did not correlate with the number of injured florets. The inability to detect low-temperature exotherms in buds attached to stem segments and cooled at 2 K/hour indicates that differential thermal analysis cannot reliably estimate blueberry flower-bud hardiness in field plantings.

Details

  • Original title: Blueberry flower-bud hardiness is not estimated by differential thermal analysis.
  • Record ID : 1994-3538
  • Languages: English
  • Source: J. am. Soc. hortic. Sci. - vol. 119 - n. 2
  • Publication date: 1994/03
  • Document available for consultation in the library of the IIR headquarters only.

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