Vol. 27 No. 1-2 (2013):
Articles

Delaying bud break in ‘Edelweiss’ grapevines to avoid spring frost injury by NAA and vegetable oil applications

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  • I.M. Qrunfleh,
  • P.E. Read
I.M. Qrunfleh
Department of Plant Production and Protection, Faculty of Agricultural Technology, Al-Balqa’ Applied University, Al-Salt 19117, Jordan.
P.E. Read
Department of Agronomy and Horticulture, University of Nebraska-Lincoln, 377J PLSH, Lincoln, 68583-0724, Nebraska, USA.
DOI: https://doi.org/10.36253/ahsc-18447
Categories

Published 2013-06-30

Keywords

  • Amigo oil,
  • bud break delay,
  • frost,
  • NAA

How to Cite

Qrunfleh, I., & Read, P. (2013). Delaying bud break in ‘Edelweiss’ grapevines to avoid spring frost injury by NAA and vegetable oil applications. Advances in Horticultural Science, 27(1-2), 18–24. https://doi.org/10.36253/ahsc-18447

Copyright (c) 2013 I.M Qrunfleh, P.E. Read

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

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Abstract

Delaying bud break is an approach to avoid spring frost damage. Field experiments were conducted during the winters of 2009 and 2010 at James Arthur Vineyards in Raymond, Nebraska to study the effect of spraying naphthaleneacetic acid (NAA) and Amigo Oil to delay bud break in ‘Edelweiss’ grapevines to avoid such damage. In 2009, the experiment consisted of five treatments: NAA (500, 750, and 1000 mg/l), oil applied at 10%, and a non-sprayed control. There were four application dates: 6 January, 3 February, 3 March, and 1 April. In 2010, treatments were NAA at 500, 1000, and 1500 mg/l, 10% oil, and the control; application dates were 28 January, 25 February, and 25 March. Bud break was evaluated throughout spring. During harvest, number and weight of clusters were recorded. Berry samples were analyzed for pH, °Brix, and titratable acidity (TA). Pruning weights and number of clusters of the 2009 treated vines were recorded in March and August 2010, respectively. In the 2009 field experiment, oil and NAA at 1000 mg/l significantly delayed bud break by two to six days, compared to the control. Pruning weights were not significantly affected by the treatments. In 2010, oil applications significantly delayed bud break by eight to 12 days compared to the control and no significant differences were found between NAA at 1500 and 1000 mg/l. In both years, treatments had no significant effects on yields, cluster weights, berry weights, °Brix, pH or TA.

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