Abstract
Olive (Olea europaea L.) shows alternate bearing, with unreliable cropping patterns and inconsistent fruit size and quality every year. In many countries, thinning with naphthaleneacetic acid (NAA) is used to minimise alternate bearing behavior in olives. However, in Italy, growers are reluctant to employ this practice and no detailed knowledge is available for specific cultivars. We evaluated the effects of spraying NAA on various dates on the productive and vegetative characteristics of the main Italian table olive cultivar'Nocellara del Belice'. Trunk cross-sectional area, fruit set, fruit drop, fruit size, pit size, yield per tree, crop density and flesh to pit ratio were analysed. The NAA treatment applied on the earliest of the dates selected increased fruit weight and flesh to pit ratio, by reducing crop density and enhancing the leaf to fruit ratio, without reducing yield. Two distinct negative relationships were found between fruit weight and crop density during "on" and "off" years, but a unique relationship between pit weight vs. crop density in both years, suggested that the pit is the strongest sink. Fruit size and quality of'Nocellara del Belice' can be enhanced by NAA application, thereby increasing economic returns in the "on" year.
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Claims 7
Claim · model-written summary
The earliest NAA application increased fruit weight.
- Taxon
- Olive
Olea europaeat0 - Treatment
- NAA treatment applied on the earliest of the dates selectede0
- Outcome
- fruit weighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The NAA treatment applied on the earliest of the dates selected increased fruit weight and flesh to pit ratio, by reducing crop density and enhancing the leaf to fruit ratio, without reducing yield.”
t0“Olive (Olea europaea L.)”
Claim · model-written summary
The earliest NAA application increased flesh to pit ratio.
- Taxon
- OliveOlea europaeat0
- Treatment
- NAA treatment applied on the earliest of the dates selectede0
- Outcome
- flesh to pit ratioe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The NAA treatment applied on the earliest of the dates selected increased fruit weight and flesh to pit ratio, by reducing crop density and enhancing the leaf to fruit ratio, without reducing yield.”
t0“Olive (Olea europaea L.)”
Claim · model-written summary
The earliest NAA application reduced crop density.
- Taxon
- OliveOlea europaeat0
- Treatment
- NAA treatment applied on the earliest of the dates selectede0
- Outcome
- crop densitye0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The NAA treatment applied on the earliest of the dates selected increased fruit weight and flesh to pit ratio, by reducing crop density and enhancing the leaf to fruit ratio, without reducing yield.”
t0“Olive (Olea europaea L.)”
Claim · model-written summary
The earliest NAA application enhanced leaf to fruit ratio.
- Taxon
- OliveOlea europaeat0
- Treatment
- NAA treatment applied on the earliest of the dates selectede0
- Outcome
- leaf to fruit ratioe0
- Direction
- enhancinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The NAA treatment applied on the earliest of the dates selected increased fruit weight and flesh to pit ratio, by reducing crop density and enhancing the leaf to fruit ratio, without reducing yield.”
t0“Olive (Olea europaea L.)”
Claim · model-written summary
The earliest NAA application did not reduce yield.
- Taxon
- OliveOlea europaeat0
- Treatment
- NAA treatment applied on the earliest of the dates selectede0
- Outcome
- yielde0
- Direction
- without reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The NAA treatment applied on the earliest of the dates selected increased fruit weight and flesh to pit ratio, by reducing crop density and enhancing the leaf to fruit ratio, without reducing yield.”
t0“Olive (Olea europaea L.)”
Claim · model-written summary
Fruit weight was negatively related to crop density in on and off years.
- Taxon
- OliveOlea europaeat0
- Outcome
- fruit weighte0
- Direction
- negativee0
- Qualifier
- "on" and "off" yearse0
- Comparator
- crop densitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two distinct negative relationships were found between fruit weight and crop density during "on" and "off" years”
t0“Olive (Olea europaea L.)”
Claim · model-written summary
Pit weight had one relationship with crop density across both years.
- Taxon
- OliveOlea europaeat0
- Outcome
- pit weighte0
- Qualifier
- both yearse0
- Comparator
- crop densitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a unique relationship between pit weight vs. crop density in both years”
t0“Olive (Olea europaea L.)”
The same questions in other papers
1-naphthaleneacetic acid · yield · Olea europaea (common olive)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
3 papers more in this group
See all 7 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.