A Five-year Study on the Effect of Cluster Thinning on Yield and Fruit Composition of `Chambourcin' Grapevines

Dami, Imed; Ferree, D. C.; Prajitna, Anton; Scurlock, Dave

doi:10.21273/hortsci.41.3.586

Cited by 33 publications

(32 citation statements)

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“…5A; Table 1) primarily because of larger interannual variation in reproductive mass. The interannual variability in fruit mass that we observed is consistent with observations from other multiyear data sets (Dami et al, 2006). It is understood that suboptimal environmental conditions in short but critical periods may adversely affect reproductive development without substantial or lasting effect on vegetative growth in perennial fruit crops, including grapes (e.g., Esparza et al, 2001;Keller and Mills, 2007;McCarthy, 1997;Stephenson et al, 2003).…”

Section: Resultssupporting

confidence: 88%

“…The inclusion of ''noncount'' shoots in the data set contributed substantially to this outcome. Number of clusters, a significant component of yield (e.g., Dami et al, 2006;Edson et al, 1993;Wolpert and Vilas, 1992), is the sole variable measured by some grape processors in predicting yields, which is a reasonable approach given that cluster number essentially is fixed early in the season (barring catastrophic disease incidence). Values of fruit mass per shoot as a function of cluster number per shoot appeared to fall into two populations; only after fruit mass per shoot exceeded %25 g was the number of clusters per shoot associated with total fruit mass (r = 0.87; Fig.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Modeling Seasonal Dynamics of Canopy and Fruit Growth in Grapevine for Application in Trellis Tension Monitoring

Tarara¹,

Blom²,

Shafii³

et al. 2009

horts

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Estimates of canopy and fruit fresh mass are useful for more accurate interpretation of data from the Trellis Tension Monitor, a tool for real-time monitoring of plant growth and predicting yield in trellised crops. In grapevines (Vitis labruscana Bailey), measurements of shoot and fruit fresh mass were collected at frequent intervals (14 to 21 days) over 5 years, and these data were correlated with variables that could be obtained nondestructively: shoot length, number of leaves per shoot, and number of clusters per shoot. Shoot length provided a good estimator of shoot fresh mass in all years. Nonlinear logistic regression models described the dynamics of canopy growth from bloom to the early stages of ripening, which often is poorly represented by simple linear regression approaches to seasonal data. A generalized function indicated a lower bound of ' '600 degree-days, after which an increase in shoot fresh mass could be considered on average to contribute only slightly to further increases in trellis wire tension. The dynamics of fruit mass were captured adequately by a nonlinear function, but not as well as vegetative mass because of larger variances in fruit mass. The number of clusters per shoot was associated with fruit mass only after the accumulation of ' '550 degree-days or, equivalently, the time at which fruit mass exceeded ' '25 g per shoot. Seasonal dynamics of the ratio of fruit to vegetative fresh mass were not sufficiently discernable by the logistic models because of the dominance of fruit mass and its large interannual variation.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Modeling Seasonal Dynamics of Canopy and Fruit Growth in Grapevine for Application in Trellis Tension Monitoring

Tarara¹,

Blom²,

Shafii³

et al. 2009

horts

View full text Add to dashboard Cite

show abstract

“…However, 'Chambourcin' requires a relatively long growing season to ripen its fruit; therefore, the vines are vulnerable to early fall frost in cool seasons and cannot acquire adequate cold acclimation, which results in winter injury. A five-year study with 'Chambourcin' demonstrated that the average fall frost date was 1 d later than harvest, resulting in inadequate acclimation and subsequent winter injury (Dami et al, 2006).…”

mentioning

confidence: 99%

Improving Freezing Tolerance of ‘Chambourcin’ Grapevines with Exogenous Abscisic Acid

Zhang¹,

Dami²

2012

horts

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The purpose of this study was to develop a protocol to increase freezing tolerance of field-grown ‘Chambourcin’ grapevines (Vitis spp.) using exogenous abscisic acid (ABA). The specific objectives were to determine the optimum concentration and timing for ABA foliar application in ‘Chambourcin’ and to evaluate morphological and physiological changes that lead to increased freezing tolerance in response to foliar ABA application. ‘Chambourcin’ grapevines were treated with a foliar ABA application of concentrations of 0, 100, 200, 300, 400, 500, 600, 700, and 800 mg·L−1 at 50% fruit set stage to evaluate ABA phytotoxicity under field conditions and identify the optimum concentration. In a subsequent experiment, ‘Chambourcin’ grapevines were treated with 400 and 600 mg·L−1 of ABA at different stages of development corresponding to 50% fruit set, 21 days after 50% fruit set, 50% veraison, 20, 30, 40, and 55 days postveraison. ABA concentrations of 700 and 800 mg·L−1 were phytotoxic and caused significant damage to leaves and flowers. Optimum concentrations of ABA did not affect yield components or basic fruit chemical composition, yet it promoted anthocyanin accumulation at harvest. Furthermore, ABA advanced bud dormancy, decreased bud water content, and eventually increased freezing tolerance under simulated freezing tests. The increased freezing tolerance of ABA-treated vines was confirmed by bud injury assessment after a natural freezing event in Jan. 2011. It was also determined that ABA was most effective when applied with an optimum concentration of 400 mg·L−1 20 to 30 days postveraison. It is concluded that exogenous ABA enhanced dormancy and increased freezing tolerance; thus, it has the potential to protect grape cultivars from freezing injury.

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“…Vine spacing can also have a large impact on grape yield and composition (Dami et al, 2005;Reynolds et al, 2004), a factor that is especially important when comparing results from our trial with results from others. Research also indicates that yield and composition of cold-climate grapes can be improved by vine management practices, such as cluster thinning or leaf pulling (Dami et al, 2006;Riesterer-Loper et al, 2019), practices that were not performed during our trial. Therefore, the potential shown by the cultivars in our trial represents results that could likely be improved upon by implementing specific training systems, vine spacing arrangements, and management practices that can optimize the yield and berry composition of each cultivar in Iowa's climate.…”

Section: Redmentioning

confidence: 94%

Yield and Berry Composition of Cold-climate Grape Cultivars and Advanced Selections in Iowa Climate

Schrader

Cochran

Domoto

et al. 2020

hortte

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Increasing interest in grape (Vitis sp.) and wine production in the upper midwest region of the United States has created a need for science-based information that characterizes the potential of cold-climate cultivars to produce quality grapes with acceptable yields. We evaluated the yield and quality (composition) of grapes from 12 cold-climate, interspecific-hybrid grape cultivars (northern hybrids) grown in a randomized and replicated field plot in central Iowa. The grape trial was planted in 2008, and crop performance of cultivars was evaluated from 2012 through 2017 (yield) and 2014 through 2017 (berry composition). The trial included two established cultivars, five newer cultivars, and five advanced selections. The established cultivars included in the study as controls were Frontenac and St. Croix. The newer cultivars evaluated in this study were Arandell, Corot Noir, La Crescent, Marquette, and Petit Ami, and the advanced selections were MN 1189, MN 1200, MN 1220, MN 1235, and MN 1258. Yield and productivity were characterized by measuring yield per vine, number of clusters per vine, average cluster weight, and pruning weight. The fruit composition indices were soluble solids concentration (SSC), pH, titratable acidity (TA), and sugar:acid ratio (SSC ÷ TA). On the basis of their strong results for both yield and fruit composition measures, ‘Marquette’, MN 1235, and MN 1220 ranked as the top-performing cultivars in Iowa’s climate, followed by Petit Ami and St. Croix. ‘Petit Ami’ had slightly lower yield consistency and slightly lower results for SSC than did the top performing cultivars, and St. Croix had among the highest and most consistent yields of the trial but showed lower results for SSC and sugar:acid ratio than many of the other cultivars. ‘La Crescent’ had midrange yields and high SSC, but the high TA of ‘La Crescent’ fruit resulted in a low sugar:acid ratio at harvest. Two cultivars (MN 1258 and MN 1200) had relatively low yields in Iowa’s climate but achieved good results for composition indices. ‘Frontenac’ had high, consistent yields and achieved high SSC, but the very high TA of ‘Frontenac’ fruit resulted in a very low sugar:acid ratio compared with most other cultivars. The remaining three cultivars (Corot Noir, MN 1189, and Arandell) performed poorly in Iowa’s climate, showing both low yield and undesirable fruit composition indices compared with the other cultivars in the trial. An itemized summary of the relative ratings for yield and fruit composition is provided to aid growers in selection and management of grape cultivars for use in Iowa and other areas of similar climate.

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A Five-year Study on the Effect of Cluster Thinning on Yield and Fruit Composition of `Chambourcin' Grapevines

Cited by 33 publications

References 0 publications

Modeling Seasonal Dynamics of Canopy and Fruit Growth in Grapevine for Application in Trellis Tension Monitoring

Modeling Seasonal Dynamics of Canopy and Fruit Growth in Grapevine for Application in Trellis Tension Monitoring

Improving Freezing Tolerance of ‘Chambourcin’ Grapevines with Exogenous Abscisic Acid

Yield and Berry Composition of Cold-climate Grape Cultivars and Advanced Selections in Iowa Climate

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