Abstract
1. Leaf fall of citrus trees as induced by the sulfur dioxide fumigation particularly after the Bordeaux spray was studied with 3-year-old potted plants of Satsuma oranges (Citrus unshiu) and Hassaku oranges (C. Hassaku) respectively. Fumigation was conducted with 0, 1, and 5ppm of sulfur dioxide for 13 days from June 5 to 17 of 1964, 2 hours each day. On half the number of each plot, Bordeaux mixture of 6-6 had been sprayed just before the fumigation on June 5, and water was sprinkled for 3 days following the 7th day from the start of fumigation.2. In Satsuma oranges, leaves fell down easily even by the single treatment of sulfur dioxide, the trend being more marked by the treatment after the Bordeaux spray. On the other hand, in Hassaku oranges leaf fall did not take place readily by the single treatment of sulfur dioxide. It was however much promoted by the treatment after the Bordeaux spray.3. In either species, the Cu content of leaves and the rate of leaf fall were much increased with rising concentration of sulfur dioxide in fumigation. The Cu content of leaves was also increased by the Bordeaux spray, but it was not deeply connected with the leaf fall. Therefore, the leaf fall due to sulfur dioxide fumigation in addition to Bordeaux spray might be reduced both to the toxic function of SO2 and that of Cu which was isolated from Bordeaux mixture by sulfur dioxide fumigation.
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Claims 11
Claim · model-written summary
Sulfur dioxide alone readily induced leaf fall in Satsuma oranges.
- Taxon
- Satsuma oranges
Citrus unshiue0 - Treatment
- sulfur dioxidee0
- Outcome
- leaves fell down easilye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In Satsuma oranges, leaves fell down easily even by the single treatment of sulfur dioxide, the trend being more marked by the treatment after the Bordeaux spray.”
Claim · model-written summary
Bordeaux spray before sulfur dioxide made Satsuma orange leaf fall more marked.
- Taxon
- Satsuma orangesCitrus unshiue0
- Treatment
- treatment after the Bordeaux spraye0
- Outcome
- leaves fell down easilye0
- Direction
- more markede0
- Comparator
- single treatment of sulfur dioxidee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In Satsuma oranges, leaves fell down easily even by the single treatment of sulfur dioxide, the trend being more marked by the treatment after the Bordeaux spray.”
Claim · model-written summary
Sulfur dioxide alone did not readily cause leaf fall in Hassaku oranges.
- Taxon
- Hassaku oranges
Citrus hassakue0 - Treatment
- single treatment of sulfur dioxidee0
- Outcome
- leaf falle0
- Direction
- did not take place readilye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in Hassaku oranges leaf fall did not take place readily by the single treatment of sulfur dioxide. It was however much promoted by the treatment after the Bordeaux spray.”
Claim · model-written summary
Bordeaux spray before sulfur dioxide strongly promoted Hassaku orange leaf fall.
- Taxon
- Hassaku orangesCitrus hassakue0
- Treatment
- treatment after the Bordeaux spraye0
- Outcome
- leaf falle0
- Direction
- much promotede0
- Comparator
- single treatment of sulfur dioxidee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in Hassaku oranges leaf fall did not take place readily by the single treatment of sulfur dioxide. It was however much promoted by the treatment after the Bordeaux spray.”
Claim · model-written summary
Leaf copper content increased as sulfur dioxide concentration rose in Satsuma oranges.
- Taxon
- Satsuma orangesCitrus unshiut0
- Treatment
- rising concentration of sulfur dioxidee0
- Outcome
- Cu content of leavese0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In either species, the Cu content of leaves and the rate of leaf fall were much increased with rising concentration of sulfur dioxide in fumigation.”
t0“Satsuma oranges (Citrus unshiu)”
Claim · model-written summary
Leaf copper content increased as sulfur dioxide concentration rose in Hassaku oranges.
- Taxon
- Hassaku orangesCitrus hassakut0
- Treatment
- rising concentration of sulfur dioxidee0
- Outcome
- Cu content of leavese0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In either species, the Cu content of leaves and the rate of leaf fall were much increased with rising concentration of sulfur dioxide in fumigation.”
t0“Hassaku oranges (C. Hassaku)”
Claim · model-written summary
Leaf fall increased as sulfur dioxide concentration rose in Satsuma oranges.
- Taxon
- Satsuma orangesCitrus unshiut0
- Treatment
- rising concentration of sulfur dioxidee0
- Outcome
- rate of leaf falle0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In either species, the Cu content of leaves and the rate of leaf fall were much increased with rising concentration of sulfur dioxide in fumigation.”
t0“Satsuma oranges (Citrus unshiu)”
Claim · model-written summary
Leaf fall increased as sulfur dioxide concentration rose in Hassaku oranges.
- Taxon
- Hassaku orangesCitrus hassakut0
- Treatment
- rising concentration of sulfur dioxidee0
- Outcome
- rate of leaf falle0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In either species, the Cu content of leaves and the rate of leaf fall were much increased with rising concentration of sulfur dioxide in fumigation.”
t0“Hassaku oranges (C. Hassaku)”
Claim · model-written summary
Bordeaux spray increased leaf copper content in both citrus species.
CitrusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Cu content of leaves was also increased by the Bordeaux spray, but it was not deeply connected with the leaf fall.”
t0“Leaf fall of citrus trees”
Claim · model-written summary
Leaf copper content was not closely connected with leaf fall.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Cu content of leaves was also increased by the Bordeaux spray, but it was not deeply connected with the leaf fall.”
t0“Leaf fall of citrus trees”
Claim · model-written summary
Authors proposed that SO2 toxicity and copper released from Bordeaux mixture jointly caused leaf fall.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Therefore, the leaf fall due to sulfur dioxide fumigation in addition to Bordeaux spray might be reduced both to the toxic function of SO2 and that of Cu which was isolated from Bordeaux mixture by sulfur dioxide fumigation.”
t0“Leaf fall of citrus trees”
The same questions in other papers
application · nutrient: content · CitrusPositive and negative results
2 papers in the same direction as this paper · 15 in the opposite direction
- positive
- positive
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See all 18 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.