Effect of Crop Levels and Pruning Timing on Bunch and Berry Parameters of Cabernet Sauvignon Grapes
Abstract
The vines were pruned at 3 timings and crop levels of 20, 30 and 40 bunches per vine were
maintained. The dynamics of TSS, Acidity and pH was directly affected by increased degree days
and sunshine hrs in the berries collected from maintained crop levels. The TSS values of berries
were found positively correlated with degree days and sun shine hours while total acid contents
were negatively correlated in each and every sampling. However, in early samplings correlation
values were higher and decreased at D3 and D4 that is 118 and 126 days after pruning. In case of first
pruning the maturity index was increased with increasing crop level and maximum index
i.e.282.11 was observed in P1XCL3.In case of P3, maturity index was reduced and the berries
collected from maximum bunch load fail to come within range of suitability. Effect of crop levels
and pruning timings were clearly noted on bunch and berry parameters. Bigger bunches were
found from P2 and smallest bunches were in P1. The third pruning with maximum crop level was
resulted in minimum TSS content in berries. Grape berries collected from the vines maintained a
crop level of 30 bunches and pruned on 5th Oct were having suitable physico-chemical parameters
for making good wines.
References
Adsule PG, Sharma AK,Upadhyay A,Sawant IS, Jogaiah
S,Upadhyay AK and Yadav DS. 2012.Grape research in
India – a review. Progressive Horticulture 44(20): 180-93.
Anderson MM,Heymann H, Benz J, Howell GS and Wolpert
JA. 2007. Effect of Crop Load Adjustment on Fruit
Ripening, Uniformity and Sensory Characteristics. ASEV
th Annual Meeting.Technical Abstracts, p
http://www.asev.org/sites/main/files/file-attachments/
techabsbook_0.pdf
Butzke CE and Boulton RB. 1997. Acidity, pH and potassium
for grape growers. Practical Winery and Vineyard, Sep-
Oct, p. 10-16.
Conde C, Silva P, Fontes N, Dias ACP, Tavares RM, Sousa MJ,
Agasse A,Delrot S and Gerós H. 2007. Biochemical
changes throughout grape berry development and fruit
and wine quality. Food 1(1): 1-22.
Coombe B. 1987. Influence of temperature on composition
and quality of grapes. ActaHorticultureae 206:23–35.
Coombe BG,DundronRJ and Short AWS. 1980. Indices of
sugar-acidity as ripeness criteria for wine grapes. Journal
of the Science of Food and Agriculture 31(5):495-502.
DOI:10.1002/jsfa.2740310512.
Falcão LD, Chaves ES, BurinVM, Falcão AP, Gris EF, BoninV
and Bordignon- Luiz MT. 2008. Ripening of Cabernet
Sauvignon berries from grapevines grown with two
different training systems and environmental conditions
in a new grape growing region in Brazil.Ciencia e
InvestigaciónAgraria 35(3):271-282.
Fillion L, Ageorges A, Picaud S, Coutos-Thevenot P, Lemoine
R, Romieu C and Delrot S. 1999. Cloning and expression
of a hexose transporter gene expressed during the
ripening of grape berry. Plant Physiology 120: 1083-93.
Iaconoi R, Bertamini M, Scienzaz A and Coombe BG. 1995.
Differential effects of canopy manipulation and shading
of Vitis vinifera L. cv. Cabernet Sauvignon. Leaf gas
exchange, photosynthetic electron transport rate and
sugar accumulation in berries. Vitis 34(4): 201-6.
Jogaiah S, Oulkar DP, Vijapure AN, Maske SR, Sharma AK and
Somkuwar RG. 2013. Influence of canopy management
practices on fruit composition of wine grape cultivars
grown in semi-arid tropical region of India. African
Journal of Agricultural Research 8(26): 3462-72. DOI:
5897/AJAR12.7307
Kliewer WM. 1966. Sugars and organic acids of Vitis vinifera.
Plant Physiology 41:923-31.
Kliewer WM and Dokoozlian NK. 2005. Leaf Area/Crop
Weight Ratios of Grapevines: Influence on Fruit
Composition and Wine Quality. Am. J. Enol. Vitic.
(2):170-81.
Nuzzo V and Matthews MA. 2006. Response of fruit growth
and ripening to crop level in dry-farmed cabernet
sauvignon on four rootstocks. American Journal of Enology
and Viticulture 57: 314-24.
Petrie P and Sadras VO. 2008. Advancement of grapevine
maturity in Australia between 1993 and 2006: putative
causes, magnitude of trends and viticultural
consequences. Australian Journal of Grape and Wine
Research 14:33-45.
Sharma AK, Jogaiah S and Somkuwar RG. 2013. Wine grape
harvesting: maturity the deciding factor. DOI: 10.13140/
1.2316.4803https://www.researchgate.net/publicatin/255
_Wine_grape_harvesting_Maturity_the_deciding_
factor
Singleton VL. 1972. Effects on red wine composition of
removing juice before fermentation to simulate variation
in berry size. American Journal of Enology and Viticulture 23:
-113.
Sweetman C, Deluc L, Cramer G, Ford C and Soole K.
Regulation of malate metabolism in grape berry and
other developing fruits.Phytochemistry 70:1329-44.
