Abstract
Nepal imports vast amounts of fresh and dried grapes every year and the trend is increasing. The massive gap in demand and production shows a great scope to expand the production of quality grapes. Gibberellic Acid (GA3), an important plant growth regulator, is used to cluster (bunch) loosening, thinning berries, and increasing berry sizes for better yield and quality of berries, however, the timing and stages of application are crucial. This study was carried out to assess the effect of GA3 doses and identify the suitable berry stage for its application in cv. Cabernet Sauvignon during 2023 and 2024 in a commercial vineyard at Patleban Vineyard and Winery, Dhading, Nepal. Experiments were carried out in randomized complete block design with two factors i.e., three doses of GA3 (0, 5 and 10 ppm) and three stages of application (post-flowering, 4-5 mm size berry and both post-flowering and 4-5 mm berry stage). The applied GA3 doses along with different stages of its application had no significant effect on the yield and quality attributes of berry. In 2023 and 2024, berry transversal and longitudinal diameters partially influenced berry weight variation. On average, the transversal diameter accounted for 30.56% of the variation, while the longitudinal diameter explained 24.33%. Sizing spray (i.e. post-set berry) of GA₃ after berry set is ineffective for improving yield in Cabernet Sauvignon. However, due to variability among grape cultivars, its application may benefit other wine grapes. Further, cultivar-specific research is recommended to optimize GA₃ use.
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Claims 6
Claim · model-written summary
GA3 dose and application stage had no significant effect on berry yield.
- Material
- Cabernet Sauvignont0
- Treatment
- applied GA3 doses along with different stages of its applicatione0
- Outcome
- yielde0
- Direction
- no significant effecte0
VitisNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The applied GA3 doses along with different stages of its application had no significant effect on the yield and quality attributes of berry.”
t0“grapevine cv. Cabernet Sauvignon”
Claim · model-written summary
GA3 dose and application stage had no significant effect on berry quality attributes.
- Material
- Cabernet Sauvignont0
- Treatment
- applied GA3 doses along with different stages of its applicatione0
- Outcome
- quality attributes of berrye0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The applied GA3 doses along with different stages of its application had no significant effect on the yield and quality attributes of berry.”
t0“grapevine cv. Cabernet Sauvignon”
Claim · model-written summary
Berry transversal diameter accounted for 30.56% of berry weight variation.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the transversal diameter accounted for 30.56% of the variation”
e1“berry weight variation”
t0“grapevine cv. Cabernet Sauvignon”
Claim · model-written summary
Berry longitudinal diameter explained 24.33% of berry weight variation.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the longitudinal diameter explained 24.33%.”
e1“berry weight variation”
t0“grapevine cv. Cabernet Sauvignon”
Claim · model-written summary
Authors conclude post-set GA3 sizing spray is ineffective for improving Cabernet Sauvignon yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sizing spray (i.e. post-set berry) of GA₃ after berry set is ineffective for improving yield in Cabernet Sauvignon.”
t0“grapevine cv. Cabernet Sauvignon”
Claim · model-written summary
Authors recommend cultivar-specific research to optimize GA3 use.
- Outcome
- cultivar-specific research is recommended to optimize GA₃ usee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Further, cultivar-specific research is recommended to optimize GA₃ use.”
t0“grapevine cv. Cabernet Sauvignon”
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