Abstract
Examination of `Riesling' grape (Vitis vinifera L.) in Virginia suggested that a high incidence of bud necrosis (BN) in some vineyards was associated with canopy shade and rapid shoot growth. BN appeared to originate as an abortion and dehydration of the primary, and occasionally secondary, buds of the developing dormant bud. BN frequency was lowest among the basal four nodes of a given shoot or cane, and increased in frequency through node 20. Experiments were conducted in 1991 and 1992 to evaluate the specific involvement of shoot growth rate and canopy shade on `Riesling' BN. Shoot growth rate (SGR), measured in a 17-day period around bloom, had a significant, positive relationship with BN in one of two vineyards. BN was positively associated with cane diameter and average internode length. Applying the growth retardant paclobutrazol significantly reduced SGR and BN incidence up to 80% among nodes 6 to 15 in two separate vineyards. Artificial shade (64% or 92% reduction in photosynthetic photon flux), suspended over vine canopies in the 3-week period before véraison, did not affect BN. Shoots of canopies that had been thinned before bloom to 10 shoots/m of canopy expressed slightly lower BN levels than shoots sampled from canopies that had been thinned to 20 shoots per meter. `Riesling' BN appeared more influenced by shoot vigor than shade under Virginia growing conditions. Chemical name β-[(4-chlorophenyl)methyl]-α-(1,1-dimethyl-ethyl)-1H-1,2,4-triazole-1-ethanol (paclobutrazol).
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Claims 10
Claim · model-written summary
Shoot growth rate had a positive relationship with bud necrosis in one of two vineyards
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Shoot growth rate (SGR), measured in a 17-day period around bloom, had a significant, positive relationship with BN in one of two vineyards”
t0“Shoot Growth Rate and Density Affect Bud Necrosis of `Riesling' Grapevines”
Claim · model-written summary
Bud necrosis was positively associated with cane diameter and average internode length
- Organ / stage
- canee2
- Outcome
- BNe2
- Direction
- positivelye2
- Qualifier
- cane diameter and average internode lengthe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“BN was positively associated with cane diameter and average internode length”
t0“Shoot Growth Rate and Density Affect Bud Necrosis of `Riesling' Grapevines”
Claim · model-written summary
Paclobutrazol significantly reduced shoot growth rate in two separate vineyards
- Organ / stage
- nodes 6 to 15e3
- Treatment
- growth retardant paclobutrazole3
- Outcome
- SGRe3
- Direction
- significantly reducede3
- Setting
- two separate vineyardse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Applying the growth retardant paclobutrazol significantly reduced SGR and BN incidence up to 80% among nodes 6 to 15 in two separate vineyards”
t0“Shoot Growth Rate and Density Affect Bud Necrosis of `Riesling' Grapevines”
Claim · model-written summary
Paclobutrazol significantly reduced bud necrosis incidence by up to 80% among nodes 6 to 15
- Organ / stage
- nodes 6 to 15e3
- Treatment
- growth retardant paclobutrazole3
- Outcome
- BN incidencee3
- Direction
- significantly reducede3
- Value
- up to 80%e3
- Setting
- two separate vineyardse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Applying the growth retardant paclobutrazol significantly reduced SGR and BN incidence up to 80% among nodes 6 to 15 in two separate vineyards”
t0“Shoot Growth Rate and Density Affect Bud Necrosis of `Riesling' Grapevines”
Claim · model-written summary
Shoots of canopies thinned to 10 shoots per meter had slightly lower bud necrosis levels than those thinned to 20 shoots per meter
- Organ / stage
- Shootse5
- Treatment
- thinned before bloom to 10 shoots/m of canopye5
- Outcome
- BN levelse5
- Direction
- slightly lowere5
- Comparator
- thinned to 20 shoots per metere5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Shoots of canopies that had been thinned before bloom to 10 shoots/m of canopy expressed slightly lower BN levels than shoots sampled from canopies that had been thinned to 20 shoots per meter”
t0“Shoot Growth Rate and Density Affect Bud Necrosis of `Riesling' Grapevines”
Claim · model-written summary
Bud necrosis was more influenced by shoot vigor than by shade under Virginia growing conditions
- Outcome
- BNe6
- Direction
- increaseinferrede6
- Qualifier
- shoot vigore6
- Comparator
- shadee6
- Setting
- Virginia growing conditionse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“`Riesling' BN appeared more influenced by shoot vigor than shade under Virginia growing conditions”
t0“Shoot Growth Rate and Density Affect Bud Necrosis of `Riesling' Grapevines”
Claim · model-written summary
Bud necrosis appeared to originate as abortion and dehydration of the primary buds of the developing dormant bud
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“BN appeared to originate as an abortion and dehydration of the primary, and occasionally secondary, buds of the developing dormant bud. BN frequency was lowest among the basal four nodes of a given shoot or cane, and increased in frequency through node 20”
t0“Shoot Growth Rate and Density Affect Bud Necrosis of `Riesling' Grapevines”
Claim · model-written summary
Bud necrosis frequency was lowest among the basal four nodes of a shoot or cane
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“BN appeared to originate as an abortion and dehydration of the primary, and occasionally secondary, buds of the developing dormant bud. BN frequency was lowest among the basal four nodes of a given shoot or cane, and increased in frequency through node 20”
t0“Shoot Growth Rate and Density Affect Bud Necrosis of `Riesling' Grapevines”
Claim · model-written summary
Bud necrosis frequency increased through node 20
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“BN appeared to originate as an abortion and dehydration of the primary, and occasionally secondary, buds of the developing dormant bud. BN frequency was lowest among the basal four nodes of a given shoot or cane, and increased in frequency through node 20”
t0“Shoot Growth Rate and Density Affect Bud Necrosis of `Riesling' Grapevines”
Claim · model-written summary
A high incidence of bud necrosis was associated with canopy shade and rapid shoot growth in some Virginia vineyards
- Taxon
- Vitis vinifera L.
Vitis viniferae0 - Outcome
- high incidence of bud necrosis (BN)e0
- Direction
- increaseinferrede0
- Qualifier
- canopy shade and rapid shoot growthe0
- Setting
- some vineyardse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Examination of `Riesling' grape (Vitis vinifera L.) in Virginia suggested that a high incidence of bud necrosis (BN) in some vineyards was associated with canopy shade and rapid shoot growth”
The same questions in other papers
paclobutrazol · disease · VitisPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
class · disease · VitisPositive and negative results
4 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
2 papers more in this group
See all 6 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.