Abstract
Abstract A disorder of Canada Muscat and Himrod grapes results in necrosis and breakdown of bunch stems near crop maturity. Berries and portions of bunches drop, in some years prior to or during harvest, resulting in substantial crop loss. Experiments were conducted at the Grape Research Station, Horticultural Research Institute of Ontario, Vineland Station, Ontario, Canada and in grower vineyards. Calcium and magnesium were applied in the form of dolomitic limestone in early spring or as foliar sprays. Three sprays of magnesium sulfate (40 kg/1000 L) or calcium chloride (5 kg/1000 L) were applied at 2‐week intervals beginning in mid‐July. Vines that received calcium or magnesium alone were compared to those that received both calcium and magnesium and to check vines which received no calcium or magnesium. Soil application of limestone reduced the extent of rachis necrosis and berry drop of Canada Muscat. Spray application of Ca and Mg also reduced the extent of rachis necrosis. Both cations were involved and their effect varied from year to year. Foliar applied magnesium chelate reduced the extent of berry drop with the cultivar Himrod in 1984 but had a smaller effect in 1985.
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Claims 5
Claim · model-written summary
Soil limestone reduced Canada Muscat rachis necrosis and berry drop.
- Taxon
- Canada Muscate0
- Material
- Canada Muscate0
- Treatment
- Soil application of limestonee0
- Outcome
- rachis necrosis and berry drope0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“Soil application of limestone reduced the extent of rachis necrosis and berry drop of Canada Muscat.”
Claim · model-written summary
Calcium spray reduced rachis necrosis.
Not reportedComparator
Verbatim
e0“Spray application of Ca and Mg also reduced the extent of rachis necrosis.”
t0“Canada Muscat and Himrod grapes”
Claim · model-written summary
Magnesium spray reduced rachis necrosis.
Not reportedComparator
Verbatim
e0“Spray application of Ca and Mg also reduced the extent of rachis necrosis.”
t0“Canada Muscat and Himrod grapes”
Claim · model-written summary
The effects of calcium and magnesium varied by year.
Verbatim
e0“Both cations were involved and their effect varied from year to year.”
t0“Canada Muscat and Himrod grapes”
Claim · model-written summary
Foliar magnesium chelate reduced Himrod berry drop in 1984, with a smaller effect in 1985.
- Taxon
- Himrode0
- Material
- Himrode0
- Treatment
- Foliar applied magnesium chelatee0
- Outcome
- berry drope0
- Direction
- reducede0
- Qualifier
- in 1984 but had a smaller effect in 1985e0
Not reportedComparator
Verbatim
e0“Foliar applied magnesium chelate reduced the extent of berry drop with the cultivar Himrod in 1984 but had a smaller effect in 1985.”
The same questions in other papers
magnesium atom · disease · VitisPositive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
calcium atom · disease · VitisPositive and negative results
8 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
- no effect
8 papers more in this group
See all 12 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.