Abstract
The present investigation was carried out during the two successive growing seasonsof 2003 and 2004 on Washington Navel orange trees grown at El-Tarh region, El-BeheraGovernorate of Egypt. In order to study the effect of spraying the trees with differentagrochemicals on vegetative growth, fruit drop, fruit retention and yield. Trees were divided intotwo groups , the first group was subjected to the foliage treatments when the fruit reached pea size(5 mm in diameter) and the second group at marble size (15 mm in diameter). Foliar sprays ofurea or 2, 4-D alone at pea or marble stage significantly increased vegetative growth. In general,foliar sprays of 2, 4-D alone or with the different calcium compounds at pea or marble stagesignificantly increased fruit retention and decreased fruit drop after June drop. Final fruit retentionwas increased (23 - 69% over the control) and pre-harvest fruit drop was decreased (63 to 100%compared to the control) by spraying boric acid or 2, 4-D alone at the pea stage in both seasons.Spraying calcium superphosphate alone at the marble stage caused an increase in final fruitretention by 33 - 7% and a decrease in pre-harvest fruit drop by 61 -72% over the control in bothseasons.
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Claims 12
Claim · model-written summary
Urea sprays at pea or marble stage significantly increased vegetative growth.
- Taxon
- Washington Navel orange
Citrus sinensise1 - Treatment
- ureae0
- Outcome
- vegetative growthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar sprays ofurea or 2, 4-D alone at pea or marble stage significantly increased vegetative growth”
e1“Washington Navel orange trees”
Claim · model-written summary
2, 4-D sprays at pea or marble stage significantly increased vegetative growth.
- Taxon
- Washington Navel orangeCitrus sinensise1
- Treatment
- 2, 4-De0
- Outcome
- vegetative growthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar sprays ofurea or 2, 4-D alone at pea or marble stage significantly increased vegetative growth”
e1“Washington Navel orange trees”
Claim · model-written summary
2, 4-D alone increased fruit retention and decreased fruit drop after June drop.
- Taxon
- Washington Navel orangeCitrus sinensise1
- Treatment
- 2, 4-D alonee0
- Outcome
- fruit retentione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar sprays of 2, 4-D alone or with the different calcium compounds at pea or marble stagesignificantly increased fruit retention and decreased fruit drop after June drop”
e1“Washington Navel orange trees”
Claim · model-written summary
2, 4-D with calcium compounds increased fruit retention.
- Taxon
- Washington Navel orangeCitrus sinensise1
- Treatment
- 2, 4-D alone or with the different calcium compoundse0
- Outcome
- fruit retentione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar sprays of 2, 4-D alone or with the different calcium compounds at pea or marble stagesignificantly increased fruit retention and decreased fruit drop after June drop”
e1“Washington Navel orange trees”
Claim · model-written summary
2, 4-D alone decreased fruit drop after June drop.
- Taxon
- Washington Navel orangeCitrus sinensise1
- Treatment
- 2, 4-D alonee0
- Outcome
- fruit drop after June drope0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar sprays of 2, 4-D alone or with the different calcium compounds at pea or marble stagesignificantly increased fruit retention and decreased fruit drop after June drop”
e1“Washington Navel orange trees”
Claim · model-written summary
2, 4-D with calcium compounds decreased fruit drop after June drop.
- Taxon
- Washington Navel orangeCitrus sinensise1
- Treatment
- 2, 4-D alone or with the different calcium compoundse0
- Outcome
- fruit drop after June drope0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar sprays of 2, 4-D alone or with the different calcium compounds at pea or marble stagesignificantly increased fruit retention and decreased fruit drop after June drop”
e1“Washington Navel orange trees”
Claim · model-written summary
Boric acid at pea stage increased final fruit retention by 23–69% over control.
- Taxon
- Washington Navel orangeCitrus sinensise1
- Treatment
- boric acide0
- Outcome
- Final fruit retentione0
- Direction
- increasede0
- Value
- 23 - 69%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Final fruit retentionwas increased (23 - 69% over the control) and pre-harvest fruit drop was decreased (63 to 100%compared to the control) by spraying boric acid or 2, 4-D alone at the pea stage in both seasons”
e1“Washington Navel orange trees”
Claim · model-written summary
2, 4-D at pea stage increased final fruit retention by 23–69% over control.
- Taxon
- Washington Navel orangeCitrus sinensise1
- Treatment
- 2, 4-De0
- Outcome
- Final fruit retentione0
- Direction
- increasede0
- Value
- 23 - 69%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Final fruit retentionwas increased (23 - 69% over the control) and pre-harvest fruit drop was decreased (63 to 100%compared to the control) by spraying boric acid or 2, 4-D alone at the pea stage in both seasons”
e1“Washington Navel orange trees”
Claim · model-written summary
Boric acid at pea stage decreased preharvest fruit drop by 63–100% against control.
- Taxon
- Washington Navel orangeCitrus sinensise1
- Treatment
- boric acide0
- Outcome
- pre-harvest fruit drope0
- Direction
- decreasede0
- Value
- 63 to 100%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Final fruit retentionwas increased (23 - 69% over the control) and pre-harvest fruit drop was decreased (63 to 100%compared to the control) by spraying boric acid or 2, 4-D alone at the pea stage in both seasons”
e1“Washington Navel orange trees”
Claim · model-written summary
2, 4-D at pea stage decreased preharvest fruit drop by 63–100% against control.
- Taxon
- Washington Navel orangeCitrus sinensise1
- Treatment
- 2, 4-De0
- Outcome
- pre-harvest fruit drope0
- Direction
- decreasede0
- Value
- 63 to 100%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Final fruit retentionwas increased (23 - 69% over the control) and pre-harvest fruit drop was decreased (63 to 100%compared to the control) by spraying boric acid or 2, 4-D alone at the pea stage in both seasons”
e1“Washington Navel orange trees”
Claim · model-written summary
Calcium superphosphate at marble stage increased final fruit retention by 33 - 7%.
- Taxon
- Washington Navel orangeCitrus sinensise1
- Treatment
- calcium superphosphate alone at the marble stagee0
- Outcome
- final fruitretentione0
- Direction
- increasee0
- Value
- 33 - 7%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying calcium superphosphate alone at the marble stage caused an increase in final fruitretention by 33 - 7% and a decrease in pre-harvest fruit drop by 61 -72% over the control in bothseasons”
e1“Washington Navel orange trees”
Claim · model-written summary
Calcium superphosphate at marble stage decreased preharvest fruit drop by 61 -72%.
- Taxon
- Washington Navel orangeCitrus sinensise1
- Treatment
- calcium superphosphate alone at the marble stagee0
- Outcome
- pre-harvest fruit drope0
- Direction
- decreasee0
- Value
- 61 -72%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying calcium superphosphate alone at the marble stage caused an increase in final fruitretention by 33 - 7% and a decrease in pre-harvest fruit drop by 61 -72% over the control in bothseasons”
e1“Washington Navel orange trees”
The same questions in other papers
2,4-D · yield · Citrus sinensis (sweet orange)Positive and negative results
12 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
11 papers more in this group
See all 15 papers →2,4-D · growth · Citrus sinensis (sweet orange)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
nitrogen · growth · Citrus sinensis (sweet orange)Positive and negative results
14 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- negative
17 papers more in this group
See all 21 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.