Abstract
Abstract Three consecutive annual nitrogen applications on trees of ‘Bartlett’ pear ( Pyrus communis L.) at 120 kg/ha increased leaf N, shoot growth, number of expanded shoot leaves, crop density, fruit size, and yield compared to no N. N application without butanedioic acid mono-(2,2-dimethylhydrazide) (daminozide) increased late bloom and fruit russet associated with pear psylla honeydew. Daminozide at 2 g/liter sprayed twice annually for 3 years, 30 and 50 days after bloom with or without N application, reduced minal growth, number of expanded shoot leaves, late bloom, fruit size, density of psylla nymphs, ( Psylla pyricola Foerster) and fruit russet from psylla honey dew. The effects of N and daminozide on tree growth, fruit size, and yield, as well as on psylla density, varied from year to year. Daminozide can reduce shoot growth of pear and subsequently reduce psylla densities and resultant damage but with some reduction in fruit size.
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Claims 9
Claim · model-written summary
Annual nitrogen applications at 120 kg/ha increased leaf N, shoot growth and number of expanded shoot leaves in Bartlett pear trees compared with no N.
- Taxon
- Pyrus communis
_Poirier_Fleurs_et_feuilles.jpg?width=60)
Pyrus communise0 - Material
- Bartlette0
- Treatment
- nitrogen applications on trees of ‘Bartlett’ pear ( Pyrus communis L.) at 120 kg/hae0
- Outcome
- leaf N, shoot growth, number of expanded shoot leavese0
- Direction
- increasede0
- Comparator
- no Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Poirier_Fleurs_et_feuilles.jpg?width=500)
Verbatim
e0“Three consecutive annual nitrogen applications on trees of ‘Bartlett’ pear ( Pyrus communis L.) at 120 kg/ha increased leaf N, shoot growth, number of expanded shoot leaves, crop density, fruit size, and yield compared to no N”
Claim · model-written summary
Annual nitrogen applications at 120 kg/ha increased crop density, fruit size and yield in Bartlett pear trees compared with no N.
- Taxon
- Pyrus communisPyrus communise0
- Material
- Bartlette0
- Treatment
- nitrogen applications on trees of ‘Bartlett’ pear ( Pyrus communis L.) at 120 kg/hae0
- Outcome
- crop density, fruit size, and yielde0
- Direction
- increasede0
- Comparator
- no Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three consecutive annual nitrogen applications on trees of ‘Bartlett’ pear ( Pyrus communis L.) at 120 kg/ha increased leaf N, shoot growth, number of expanded shoot leaves, crop density, fruit size, and yield compared to no N”
Claim · model-written summary
N application without daminozide increased late bloom and fruit russet associated with pear psylla honeydew in pear.
- Taxon
- PearPyrus communist0
- Treatment
- N application without butanedioic acid mono-(2,2-dimethylhydrazide) (daminozide)e0
- Interactor
- pear psylla
Cacopsylla pyrie0pest - Outcome
- late bloom and fruit russete0
- Direction
- increasede0
- Qualifier
- associated with pear psylla honeydewe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pear Performance1”
e0“N application without butanedioic acid mono-(2,2-dimethylhydrazide) (daminozide) increased late bloom and fruit russet associated with pear psylla honeydew”
Claim · model-written summary
Daminozide at 2 g/liter sprayed twice annually for 3 years reduced terminal shoot growth and number of expanded shoot leaves in pear, with or without N application.
- Taxon
- PearPyrus communist0
- Treatment
- Daminozide at 2 g/liter sprayed twice annually for 3 yearse0
- Outcome
- minal growth, number of expanded shoot leavese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pear Performance1”
e0“Daminozide at 2 g/liter sprayed twice annually for 3 years, 30 and 50 days after bloom with or without N application, reduced minal growth, number of expanded shoot leaves”
Claim · model-written summary
Daminozide reduced late bloom and fruit size in pear.
- Taxon
- PearPyrus communist0
- Treatment
- Daminozide at 2 g/liter sprayed twice annually for 3 yearse0
- Outcome
- late bloom, fruit sizee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pear Performance1”
e0“Daminozide at 2 g/liter sprayed twice annually for 3 years, 30 and 50 days after bloom with or without N application, reduced minal growth, number of expanded shoot leaves, late bloom, fruit size”
Claim · model-written summary
Daminozide reduced the density of pear psylla nymphs on pear trees.
- Taxon
- PearPyrus communist0
- Treatment
- Daminozide at 2 g/liter sprayed twice annually for 3 yearse0
- Interactor
- Psylla pyricola Foerstere0pest
- Outcome
- density of psylla nymphse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pear Performance1”
e0“Daminozide at 2 g/liter sprayed twice annually for 3 years, 30 and 50 days after bloom with or without N application, reduced minal growth, number of expanded shoot leaves, late bloom, fruit size, density of psylla nymphs, ( Psylla pyricola Foerster)”
Claim · model-written summary
Daminozide reduced fruit russet from psylla honeydew in pear.
- Taxon
- PearPyrus communist0
- Treatment
- Daminozide at 2 g/liter sprayed twice annually for 3 yearse0
- Interactor
- Psylla pyricola Foerstere0pest
- Outcome
- fruit russet from psylla honey dewe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pear Performance1”
e0“Daminozide at 2 g/liter sprayed twice annually for 3 years, 30 and 50 days after bloom with or without N application, reduced minal growth, number of expanded shoot leaves, late bloom, fruit size, density of psylla nymphs, ( Psylla pyricola Foerster) and fruit russet from psylla honey dew”
Claim · model-written summary
The effects of N and daminozide on pear tree growth, fruit size, yield and psylla density varied from year to year.
- Taxon
- PearPyrus communist0
- Outcome
- tree growth, fruit size, and yield, as well as on psylla densitye0
- Qualifier
- varied from year to yeare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pear Performance1”
e0“The effects of N and daminozide on tree growth, fruit size, and yield, as well as on psylla density, varied from year to year”
Claim · model-written summary
The authors conclude daminozide can reduce shoot growth of pear and subsequently reduce psylla densities and resultant damage, but with some reduction in fruit size.
- Taxon
- pearPyrus communise0
- Treatment
- Daminozidee0
- Outcome
- psylla densities and resultant damagee0
- Qualifier
- reduce shoot growth of pear and subsequently reducee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Daminozide can reduce shoot growth of pear and subsequently reduce psylla densities and resultant damage but with some reduction in fruit size”
The same questions in other papers
application · pest · Pyrus communis (pear)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
1 paper more in this group
See all 5 papers →nitrogen · yield · Pyrus communis (pear)Positive and negative results
7 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- no effect
- no effect
9 papers more in this group
See all 13 papers →nitrogen · growth · Pyrus communis (pear)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.