TOMATO YIELD AND FRUIT CHARACTERISTICS IN RELATION TO BASAL LEAF REMOVAL

2004 ◽  
pp. 411-416 ◽  
Author(s):  
C. Leonardi ◽  
F. Giuffrida ◽  
V. Seiglitano
Keyword(s):  
Leaf Removal ◽  
Fruit Characteristics ◽  
Basal Leaf ◽  
Tomato Yield

Canopy manipulation of Okanagan Riesling vines for improvement of winegrape quality

1992 ◽  
Vol 72 (2) ◽  
pp. 489-496 ◽  
Author(s):  
A. G. Reynolds ◽  
P. L. Sholberg ◽  
D. A. Wardle
Keyword(s):  
Untreated Control ◽  
Titratable Acidity ◽  
Leaf Removal ◽  
Basal Leaf ◽  
Bunch Rot ◽  
Canopy Management

Vigorous, Geneva Double Curtain-trained Okanagan Riesling vines were subjected over a 2-yr period (1987–1988) to four canopy manipulation practices: shoot positioning; shoot positioning plus postbloom hedging to 12 leaves per shoot; basal leaf removal; and an untreated control, in combination with the presence or absence of iprodione (Rovral 50WP) fungicide sprays. Shoot positioning and shoot positioning plus hedging reduced weight of cane prunings relative to control vines in 1988, but increased yield, cluster weight, and berries per cluster. Shoot positioning, shoot positioning plus hedging, and basal leaf removal reduced °Brix in 1988, but tended to reduce titratable acidity in both seasons. Shoot positioning plus hedging reduced pH in 1987, while shoot positioning and shoot positioning plus hedging reduced pH and potassium (K+) in 1988. Neither Rovral nor canopy manipulation appeared to have any significant impact on the percentage of bunch rot-affected clusters. Shoot positioning of Geneva Double Curtain-trained Okanagan Riesling is recommended as a method to reduce titratable acidity, pH and K+, hence improving potential winegrape quality.Key words: Vitis, grape, hedging, shoot positioning, leaf removal, canopy management

scholarly journals A COMPARATIVE STUDY ON EFFECTS OF REFLECTIVE MULCH AS AN ALTERNATIVE TO SOME OTHER PREHARVEST APPLICATIONS TO IMPROVE PHENOLIC COMPOUNDS PROFILE AND ANTHOCYANIN ACCUMULATION OF CV. SYRAH WINE GRAPE (V. vinifera L.)

2020 ◽  
Vol 19 (4) ◽  
pp. 87-93
Author(s):  
Demir Kok ◽  
Erdinç Bal
Keyword(s):  
Phenolic Compounds ◽  
Total Phenolic ◽  
Anthocyanin Content ◽  
Wine Grape ◽  
Leaf Removal ◽  
Total Anthocyanin ◽  
Basal Leaf ◽  
Grape Quality ◽  
Reflected Light ◽  
Total Anthocyanin Content

In today’s modern viticulture, reflective mulches and summer pruning practices are remarkable tools thatmay facilitate grape growers to increase yield and improve the grape quality. This study aimed to assess howreflective mulch application (RM) affects components of phenolic compounds and anthocyanin of cv. Syrahthe compared to other preharvest applications such as basal leaf removal application (BLR), foliar prolineapplication (PRO) and their various combinations, including applications of basal leaf removal + proline(BLR+PRO), basal leaf removal + reflective mulch (BLR+RM), proline + reflective mulch (PRO+RM) andbasal leaf removal + proline + reflective mulch (BLR+PRO+RM). The study findings demonstrated that reflectivemulch application (RM) may considerably enhance light distribution in the canopy of grapevine byincreasing reflected light from the ground. In the current study, it was observed that combined applicationshad significant roles on improving yield and quality characteristics. In terms of total phenolic compoundscontent, the highest values were obtained from applications of BLR+RM and PRO+RM. Moreover, all applicationshad a rise to crucial increases in total anthocyanin content of cv. Syrah wine grape when the comparedwith C application.

scholarly journals Changes in Within-Shoot Carbon Partitioning in Pinot Noir Grapevines Subjected to Early Basal Leaf Removal

2018 ◽  
Vol 9 ◽  
Author(s):  
Tommaso Frioni ◽  
Dana Acimovic ◽  
Sergio Tombesi ◽  
Paolo Sivilotti ◽  
Alberto Palliotti ◽  
...  
Keyword(s):  
Carbon Partitioning ◽  
Pinot Noir ◽  
Leaf Removal ◽  
Basal Leaf

scholarly journals Carbon partitioning between shoot organs following early leaf removal

2019 ◽  
Vol 13 ◽  
pp. 03002
Author(s):  
Paolo Sabbatini ◽  
Dana Acimovic ◽  
Tommaso Frioni ◽  
Sergio Tombesi ◽  
Paolo Sivilotti ◽  
...  
Keyword(s):  
Shoot Apex ◽  
Fruit Set ◽  
Carbon Allocation ◽  
Pinot Noir ◽  
Sink Strength ◽  
Leaf Removal ◽  
Basal Leaf ◽  
Fruit Composition ◽  
Defoliation Treatment ◽  
Cool Climate

In grapevines, basal leaf removal at bloom often induces a reduction of fruit set. The effect is related to a reduction in carbon availability for different plant organs competing for photosynthates. To understand and quantify carbon allocation among major sink organs following the early basal leaf removal, the effect of early basal defoliation was studied in Pinot noir grapevines. The experiment was performed in Michigan, a cool climate viticultural region, and three levels of defoliation were imposed at full bloom: (1) no leaves removed (DF-0); (2) six leaves removed from six basal nodes (DF-6); and (3) ten leaves removed from ten basal nodes (DF-10). A week after the defoliation treatment, 13C pulsing was executed to the defoliated shoots. Photosynthesis (Pn), carbon distribution, fruit set, vine performance and basic fruit composition were measured. LR treatments induced higher Pn when compared to LR-0. The highest 13C allocation (%) was recorded in the shoot apex of the LR-10 treatment and LR-10 had the lowest percentage of 13C transported to the cluster, with a reduced fruit set of about 60% when compared to LR-0. The severity of leaf removal reduced significantly fruit set and increased shoot apex sink strength at the expense of the cluster.

scholarly journals Effects of the severity and timing of basal leaf removal on the amino acids profiles of Sauvignon Blanc grapes and wines

2019 ◽  
Vol 18 (9) ◽  
pp. 2052-2062 ◽  
Author(s):  
Xiao-feng YUE ◽  
Yan-lun JU ◽  
Zi-zhu TANG ◽  
Ya-meng ZHAO ◽  
Xu-liang JIAO ◽  
...  
Keyword(s):  
Amino Acids ◽  
Leaf Removal ◽  
Sauvignon Blanc ◽  
Basal Leaf

scholarly journals Basal defoliation and their influence in agronomic and phytopathological traits in tomato plants

2011 ◽  
Vol 29 (3) ◽  
pp. 377-381 ◽  
Author(s):  
Laércio J da Silva ◽  
Carla do C Milagres ◽  
Derly José H da Silva ◽  
Carlos Nick ◽  
João Paulo A de Castro
Keyword(s):  
Disease Severity ◽  
Crop Production ◽  
Infected Plant ◽  
Leaf Removal ◽  
Planting Dates ◽  
Tomato Crop ◽  
Tomato Plants ◽  
Basal Leaf ◽  
Plant Area ◽  
Four Levels

The incidence of leaf diseases is one of the main factors limiting the tomato crop production, increasing the production cost due to excessive pesticide application. The basal leaf removal could reduce inoculum sources, disease severity and contribute to reducing the use of pesticide. Aiming to evaluate the efficiency of this practice on the reduction of tomato leaf diseases and the effect in the quality and in the productivity of the tomato plants for in natura consumption, two experiments were carried out to test four levels of basal leaf removal. Basal leaves removal, at fruit harvesting, is efficient in reducing the infected plant area by disease, what can mean smaller disease severity and least inoculum source in the field. Also, the all basal leaf removal does not affect yield and quality of the tomato fruits. Other studies are necessary to evaluate the effect of adopting this practice in different planting dates, spacing, varieties, successive plantings and the financial viability of adopting this practice.

scholarly journals The Impact of Early Basal Leaf Removal at Different Sides of the Canopy on Aglianico Grape Quality

Agriculture ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 630
Author(s):  
Luigi Tarricone ◽  
Michele Faccia ◽  
Gianvito Masi ◽  
Giuseppe Gambacorta
Keyword(s):  
Antioxidant Activity ◽  
Leaf Removal ◽  
Total Polyphenols ◽  
Climate Conditions ◽  
Basal Leaf ◽  
The North ◽  
Grape Quality ◽  
Cluster Thinning ◽  
The Impact ◽  
East West

It is known that early removal of basal leaves improves the exposure of cluster to direct sunlight and UV radiation, which positively influence the phenolic compounds and anthocyanin concentration of berries. This study was carried out to evaluate the effect of leaf removal applied before flowering to the basal zone of the canopy at different sides (fruit-zone north canopy side, south canopy side and north–south canopy side, respectively) of Aglianico vines trained to vertical shoot position system and row oriented to east–west (EW). The study was conducted in the controlled and guaranteed designation of origin (CGDO) Castel del Monte area (Apulia region, Italy). The treatment did not affect yield per vine, and nor sugar, pH, and total acidity of grapes. When it was applied to the basal south canopy side, the concentration of proanthocyanidins and total polyphenols of grapes increased, as well as antioxidant activity. In particular, anthocyanins content, determined by HPLC, increased by 20% with respect to control when treatment was applied to south and north–south canopy sides. Interaction between season period and treatment was found for all anthocyanins except for petunidin-3-coumaroyl-glucoside. Basal leaf removal applied to the north canopy side caused an increase in malvidin-3-O-glucoside content in grapes in 2016 and 2018, but not in 2017. Our results indicate that basal leaf removal (six basal leaves removed from the base of the shoots) before flowering (BBCH 57) can be used as an effective strategy to improve grape total polyphenols, anthocyanins concentration and antioxidant activity in vineyards cultivated under warm climate conditions. The treatment could represent a sustainable alternative to manual cluster thinning since it does not reduce yield per vine and can be performed mechanically.

Impact of Prebloom and Fruit Set Basal Leaf Removal on the Flavonol and Anthocyanin Composition of Tempranillo Grapes

2012 ◽  
Vol 63 (3) ◽  
pp. 367-376 ◽  
Author(s):  
María P. Diago ◽  
Belén Ayestarán ◽  
Zenaida Guadalupe ◽  
Stefano Poni ◽  
Javier Tardáguila
Keyword(s):  
Fruit Set ◽  
Leaf Removal ◽  
Basal Leaf ◽  
Anthocyanin Composition
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