Abstract
A field trial was conducted during 2013-14 and 2014-15 fruiting seasons in growers' vineyards around Nashik, Maharashtra, India to improve efficacy of GA3 sprays in berrythinning. As smaller clusters have fewer berries, cluster compactness derived at by number of berries per unit length (cm) of rachis, and, berry-diameter were considered as a measure of berry-thinning. As GA3 effect in berry-thinning is stage-specific, canes uniformly thick in a vine only were retained to achieve uniformity in flowering, by inducing uniform bud-break. Cane regulation did not result in uniformity in bud-break or flowering. Blanket spray of GA3 thrice @ 20g a.i./ha, each coupled with either removal of non-uniform canes or retention of all the canes could effectively reduce cluster compactness by reducing number of berries per cluster, without increasing total length of the rachis/cluster or berry diameter. Vine yield and quality in terms of total soluble solids and acid content were not affected by the treatments. Considering cluster-compactness, yield and ease of cultural operations, retention of all the canes in a vine, coupled with three blanket sprays each of GA3 @ 20g a.i/ha, on alternate days commencing from initiation of the bloom, is recommended for 'Thompson Seedless'.
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Claims 7
Claim · model-written summary
Cane regulation did not make bud break uniform.
Not reportedComparator
Verbatim
e0“Cane regulation did not result in uniformity in bud-break or flowering”
t0“'Thompson Seedless' Grape (Vitis vinifera L.)”
Claim · model-written summary
Cane regulation did not make flowering uniform.
Not reportedComparator
Verbatim
e0“Cane regulation did not result in uniformity in bud-break or flowering”
t0“'Thompson Seedless' Grape (Vitis vinifera L.)”
Claim · model-written summary
Three blanket GA3 sprays reduced cluster compactness by reducing berries per cluster.
- Taxon
- Grapet0
- Treatment
- Blanket spray of GA3 thrice @ 20g a.i./hae0
- Outcome
- cluster compactnesse0
- Direction
- reducee0
Not reportedComparator
Verbatim
e0“Blanket spray of GA3 thrice @ 20g a.i./ha, each coupled with either removal of non-uniform canes or retention of all the canes could effectively reduce cluster compactness by reducing number of berries per cluster”
t0“'Thompson Seedless' Grape (Vitis vinifera L.)”
Claim · model-written summary
The sprays did not increase rachis length or berry diameter.
- Taxon
- Grapet0
- Treatment
- GA3e1
- Outcome
- total length of the rachis/cluster or berry diametere0
- Direction
- without increasinge0
Not reportedComparator
Verbatim
e0“without increasing total length of the rachis/cluster or berry diameter”
t0“'Thompson Seedless' Grape (Vitis vinifera L.)”
e1“Blanket spray of GA3 thrice @ 20g a.i./ha”
Claim · model-written summary
Treatments did not affect vine yield.
Not reportedComparator
Verbatim
e0“Vine yield and quality in terms of total soluble solids and acid content were not affected by the treatments”
t0“'Thompson Seedless' Grape (Vitis vinifera L.)”
Claim · model-written summary
Treatments did not affect total soluble solids or acid content.
- Taxon
- Grapet0
- Treatment
- treatmentse0
- Outcome
- total soluble solids and acid contente0
- Direction
- not affectede0
Not reportedComparator
Verbatim
e0“Vine yield and quality in terms of total soluble solids and acid content were not affected by the treatments”
t0“'Thompson Seedless' Grape (Vitis vinifera L.)”
Claim · model-written summary
The authors recommend retaining all canes and three GA3 sprays on alternate days from bloom initiation.
Verbatim
e0“retention of all the canes in a vine, coupled with three blanket sprays each of GA3 @ 20g a.i/ha, on alternate days commencing from initiation of the bloom, is recommended for 'Thompson Seedless'”
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