Abstract
The lack of pollination and the effects of blossom thinners were simulated by enclosing selected `McIntosh' apple spurs in super-light insect barrier netting at the pink stage of flower development. Fruit set was recorded and fruit size measured at 2- to 3-day intervals from petal fall until initial set. The effects of lack of pollination or the use of blossom thinners on initial set could not be determined with any degree of accuracy until at least 8 days after petal fall. NAA was applied at 8 ppm when fruit were 8.5 mm in diameter. Fruit set and fruit size were taken at 2- to 3-day intervals until the end of June drop. Fruit set on NAA-treated trees was greater than that on check trees for 2 weeks following application. Although NAA ultimately did cause significant thinning, it was not until 3 to 3.5 weeks after application that it was possible to determine with accuracy the thinning response to NAA. However, the thinning response to NAA could be predicted within a week after application, since growth of fruitlets that ultimately abscised slowed 4 to 7 days after the application of NAA. A working model to predict effective pollination and the response to chemical thinners in apples will be discussed.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
The effects of absent pollination or blossom thinners on initial apple fruit set could not be accurately determined until at least eight days after petal fall.
- Taxon
- Apples
Malus domesticat0 - Treatment
- lack of pollination or the use of blossom thinnerse0
- Outcome
- initial sete0
- Value
- at least 8 days after petal falle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of lack of pollination or the use of blossom thinners on initial set could not be determined with any degree of accuracy until at least 8 days after petal fall”
t0“Apples”
t1“Apples”
Claim · model-written summary
Fruit set on NAA treated apple trees exceeded check trees for two weeks after application.
- Taxon
- ApplesMalus domesticat0
- Treatment
- NAA-treatede0
- Outcome
- Fruit sete0
- Direction
- greatere0
- Value
- 2 weekse0
- Comparator
- check treese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit set on NAA-treated trees was greater than that on check trees for 2 weeks following application”
t0“Apples”
t1“Apples”
Claim · model-written summary
NAA ultimately caused significant apple fruit thinning.
- Taxon
- ApplesMalus domesticat0
- Treatment
- NAAe0
- Outcome
- thinninge0
- Direction
- thinninge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NAA ultimately did cause significant thinning”
t0“Apples”
t1“Apples”
Claim · model-written summary
Accurate determination of NAA thinning response became possible 3 to 3.5 weeks after application.
- Taxon
- ApplesMalus domesticat0
- Outcome
- thinning response to NAAe0
- Value
- 3 to 3.5 weeks after applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it was not until 3 to 3.5 weeks after application that it was possible to determine with accuracy the thinning response to NAA”
t0“Apples”
t1“Apples”
Claim · model-written summary
NAA thinning response could be predicted within a week after application.
- Taxon
- ApplesMalus domesticat0
- Outcome
- thinning response to NAAe0
- Value
- within a week after applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the thinning response to NAA could be predicted within a week after application”
t0“Apples”
t1“Apples”
Claim · model-written summary
Fruitlets that ultimately abscised slowed growth 4 to 7 days after NAA application.
- Taxon
- ApplesMalus domesticat0
- Organ / stage
- fruitletse0
- Treatment
- application of NAAe0
- Outcome
- growth of fruitlets that ultimately abscisede0
- Direction
- slowede0
- Value
- 4 to 7 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of fruitlets that ultimately abscised slowed 4 to 7 days after the application of NAA”
t0“Apples”
t1“Apples”
The same questions in other papers
1-naphthaleneacetic acid · growth · Malus domestica (apple)Results differ
30 papers in the same direction as this paper · 12 in the opposite direction
- negative
- negative
- negative
39 papers more in this group
See all 43 papers →1-naphthaleneacetic acid · yield · Malus domestica (apple)Results differ
14 papers in the same direction as this paper · 50 in the opposite direction
- positive
- positive
- positive
61 papers more in this group
See all 65 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.