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Evaluation Of Chilling Requirements For Six Arkansas Blackberry Cultivars Utilizing Stem Cuttings, Dayanee Yazzetti, John R. Clark
Evaluation Of Chilling Requirements For Six Arkansas Blackberry Cultivars Utilizing Stem Cuttings, Dayanee Yazzetti, John R. Clark
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Woody perennial plants including blackberries (Rubus subgenus Rubus) require certain amounts of chilling or rest hours below 7ºC during the dormant season for successful bud break the following year. Arkansas-developed blackberry cultivars are being grown in various climates worldwide and all cultivars need chilling requirement estimates for accurate recommendations of adaptation. Determining chilling requirement using stem cuttings collected from field-grown plants rather than whole plants is a desirable system. We conducted a study to evaluate both artificial and field chilling of six cultivars. For the artificial-chilling study, 12- node stem cuttings were collected 2 days after the first killing frost. …
Determination Of Chilling Requirement Of Arkansas Thornless Blackberry Cultivars, Chrislyn A. Drake, John R. Clark
Determination Of Chilling Requirement Of Arkansas Thornless Blackberry Cultivars, Chrislyn A. Drake, John R. Clark
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Little research has been done to determine the chilling requirement for blackberry cultivars. However, field observations from areas where fewer hours of chilling occur indicate that ‘Navaho’ requires more hours of chilling than does ‘Arapaho’. The objective of our study was to determine a method for measuring the chilling requirement using whole plants of two blackberry cultivars, Arapaho and Navaho. One-year old, bare-root plants were field-dug on 26 October 1999 and placed in a cold chamber at 3ºC. Ten single-plant replications of each cultivar were removed at 100-hour intervals up to 1000 hours. The plants were potted and placed in …