Abstract
Abstract Experiments to evaluate the effect of in‐season calcium (Ca) sprays on late‐season peach ( Prunus persica L. Batsch cv. Calrico) were carried out for a 2‐year period. Calcium formulations (0.5% and 1.0% in 2008 and only 0.5% tested in 2009) supplied either as CaCl 2 or Ca propionate in combination with two or three adjuvants (0.05% of the nonionic surfactants Tween 20 and Break Thru, and 0.5% carboxymethylcellulose, CMC) were sprayed four to five times over the growing season. Peach mesocarp and endocarp Ca concentrations were determined on a 15‐day basis from the beginning of May until the end of June. Further tissue analyses were performed at harvest. A decreasing trend in fruit Ca concentrations over the growing season was always observed regardless of the Ca treatments. Both in 2008 and 2009, significant tissue Ca increments associated with the application of Ca‐containing sprays in combination with adjuvants were only observed in June, which may be coincident with the period of pit hardening. In 2008, both at harvest and after cold storage, the total soluble‐solids concentration (° Brix) of fruits supplied with Ca propionate (0.5% and 1.0% Ca) was always lower as compared to the rest of treatments. The application of multiple Ca‐containing sprays increased firmness at harvest and after cold storage, especially when CaCl 2 was the active ingredient used. Supplying the adjuvants Tween 20 and CMC increased fruit acidity both at harvest and after cold storage. Evaluation of the development of physiological disorders after cold storage (2 weeks at 0°C) indicated a lower susceptibility of Ca‐treated fruits to internal browning. Fruits treated with multiple CaCl 2 ‐, CMC‐, and Break Thru®‐containing sprays during the growing season were significantly less prone to the development of chilling injuries as compared to untreated peaches.
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Claims 7
Claim · model-written summary
Fruit calcium concentrations declined over the season regardless of calcium treatment.
- Taxon
- peach
Prunus persicat0 - Outcome
- fruit Ca concentrationse0
- Direction
- decreasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A decreasing trend in fruit Ca concentrations over the growing season was always observed regardless of the Ca treatments.”
t0“peach”
Claim · model-written summary
Calcium sprays with adjuvants increased tissue calcium significantly only in June.
- Taxon
- peachPrunus persicat0
- Treatment
- Ca‐containing sprays in combination with adjuvantse0
- Outcome
- tissue Cae0
- Direction
- incrementse0
- Qualifier
- only observed in Junee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both in 2008 and 2009, significant tissue Ca increments associated with the application of Ca‐containing sprays in combination with adjuvants were only observed in June”
t0“peach”
Claim · model-written summary
Calcium propionate gave lower soluble solids at harvest and after cold storage than other treatments.
- Taxon
- peachPrunus persicat0
- Treatment
- Ca propionate (0.5% and 1.0% Ca)e0
- Outcome
- total soluble‐solids concentration (° Brix)e0
- Direction
- lowere0
- Comparator
- rest of treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both at harvest and after cold storage, the total soluble‐solids concentration (° Brix) of fruits supplied with Ca propionate (0.5% and 1.0% Ca) was always lower as compared to the rest of treatments.”
t0“peach”
Claim · model-written summary
Multiple calcium sprays increased firmness at harvest and after storage, especially with calcium chloride.
- Taxon
- peachPrunus persicat0
- Treatment
- multiple Ca‐containing sprayse0
- Outcome
- firmnesse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of multiple Ca‐containing sprays increased firmness at harvest and after cold storage, especially when CaCl 2 was the active ingredient used.”
t0“peach”
Claim · model-written summary
Tween 20 and CMC increased fruit acidity at harvest and after storage.
- Taxon
- peachPrunus persicat0
- Treatment
- Tween 20 and CMCe0
- Outcome
- fruit aciditye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Supplying the adjuvants Tween 20 and CMC increased fruit acidity both at harvest and after cold storage.”
t0“peach”
Claim · model-written summary
Calcium treated peaches had lower internal browning susceptibility after cold storage.
- Taxon
- peachPrunus persicat0
- Treatment
- Ca‐treated fruitse0
- Outcome
- susceptibility of Ca‐treated fruits to internal browninge0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Evaluation of the development of physiological disorders after cold storage (2 weeks at 0°C) indicated a lower susceptibility of Ca‐treated fruits to internal browning.”
t0“peach”
Claim · model-written summary
Calcium chloride, CMC and Break Thru sprays significantly reduced chilling injury versus untreated peaches.
- Taxon
- peachesPrunus persicae0
- Treatment
- multiple CaCl 2 ‐, CMC‐, and Break Thru®‐containing sprayse0
- Outcome
- development of chilling injuriese0
- Direction
- less pronee0
- Comparator
- untreated peachese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruits treated with multiple CaCl 2 ‐, CMC‐, and Break Thru®‐containing sprays during the growing season were significantly less prone to the development of chilling injuries as compared to untreated peaches.”
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See all 24 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.