Within and between tree variability in fruit characteristics associated with bitter pit incidence of ‘Braeburn’ apple

Broom, F. D.; Smith, G. S.; Miles, Daniel; Green, T. G. A.

doi:10.1080/14620316.1998.11511014

Cited by 14 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Cultivars are known to vary in their susceptibility to Ca-related disorders such as bitter pit (Ferguson and Watkins, 1989). 'Braeburn' is a cultivar originating from New Zealand with a known susceptibility to developing bitter pit on initial crops (Le Grange et al, 1998a) and with reported low fruit Ca concentrations (Broom et al, 1998). There is however limited information concerning the mineral nutrition of 'Braeburn' in different regions and much existing information has related to vigorous trees growing on nondwarfi ng rootstocks such as MM106 (Broom et al, 1998;Volz et al, 1994).…”

Section: Methodsmentioning

confidence: 99%

“…'Braeburn' is a cultivar originating from New Zealand with a known susceptibility to developing bitter pit on initial crops (Le Grange et al, 1998a) and with reported low fruit Ca concentrations (Broom et al, 1998). There is however limited information concerning the mineral nutrition of 'Braeburn' in different regions and much existing information has related to vigorous trees growing on nondwarfi ng rootstocks such as MM106 (Broom et al, 1998;Volz et al, 1994). Little is known concerning fruit Ca concentration of 'Braeburn' growing in high density orchards on dwarfi ng rootstocks in the Pacifi c Northwest of North America.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Application of CaCl2 Sprays Earlier in the Season May Reduce Bitter Pit Incidence in 'Braeburn' Apple

Neilsen¹,

Neilsen²,

Dong³

et al. 2005

HortSci

View full text Add to dashboard Cite

Calcium application trials were undertaken in a 'Braeburn' apple (Malus ×domestica Borkh.) orchard with a history of bitter pit development at harvest. In 2000, an early season calcium chloride application strategy was compared with the unsprayed control and a late season application strategy. From 2001–03, the assessment of timing of calcium chloride sprays was extended by comparing effects of five weekly sprays applied during the growing season either early, middle, or late season. Other Ca application strategies tested included sprays of acidified calcium carbonate suspensions and soil application of calcium thiosulphate. In the first experiment, early application of calcium chloride reduced the occurrence of bitter pit at harvest and after 3 months cold air storage, despite having low harvest fruit Ca concentrations. Late sprayed fruit had a higher incidence of bitter pit. In the second experiment, the later calcium chloride was sprayed in the growing season, the higher the fruit Ca concentration at harvest. Despite this, no bitter pit was measured at harvest for 2 years for early and midseason calcium chloride spray regimes. In 2003, when Ca disorders were severe and fruit large, bitter pit was observed despite early season calcium chloride sprays. Soil calcium thiosulphate application and foliar sprays of acidified calcium carbonate suspensions failed to meaningfully augment harvest fruit Ca concentrations and affect bitter pit incidence.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Application of CaCl2 Sprays Earlier in the Season May Reduce Bitter Pit Incidence in 'Braeburn' Apple

Neilsen¹,

Neilsen²,

Dong³

et al. 2005

HortSci

View full text Add to dashboard Cite

show abstract

“…Höhere Ca-Konzentrationen ohne Verminderung der Fruchtgröße wurden auch bei größerer Samenzahl je Frucht gefunden, allerdings nicht bei allen Apfelsorten (z. B. Bramlage et al 1990;Broom et al 1998). Brookfield et al (1996) fanden einen Zusammenhang zwischen niedrigem Ca-Gehalt und niedriger Samenzahl, aber keinen direkten Einfluss der Samenzahl auf die CaKonzentration der Früchte.…”

Section: Faktoren Innerhalb Der Pflanzeunclassified

Die Kalziumversorgung von Äpfeln in Abhängigkeit von pflanzlichen Regelungsvorgängen

Saure

2005

Erwerbs-Obstbau

View full text Add to dashboard Cite

“…Under New Zealand conditions, Warrington et al (1996) reported that the largest fruit on`Granny Smith' trees were produced in the upper regions and the smallest in the inner lower tier, a trend found to be consistent for six dierent canopy forms. Broom et al (1998) have also reported that position in the canopy and shoot type are factors aecting fruit size iǹ Braeburn' apple.…”

Section: Within-tree Variationmentioning

confidence: 99%

Variation of Fruit Size and Growth within an Apple Tree and its Influence on Sampling Methods for Estimating the Parameters of Mid-season Size Distributions

et al. 2000

View full text Add to dashboard Cite

This paper presents a quantitative description of variation of mid-season (62 days after bloom) fruit weight (FW) and proceeding growth rates within an apple tree. Based on this knowledge, several sampling strategies were designed and compared for their accuracy and eciency in estimating the mean and variance of fruit size within an apple tree limb at mid-season. The analysis revealed the presence of systematic trends in FW within the canopy. Fruit weight, at the base of each limb increased from the bottom tier vertically upwards within the canopy. Generally, FW in the lower tier limbs increased from the base outwards, but this trend was reversed in the upper tier. Mid-season FW was also aected by the shoot type, the spur fruit being signi®cantly larger than lateral or terminal fruit. We conclude that the systematic variation in FW is a result of plant factors interacting mainly with the within-canopy light environment. This study also demonstrated that the predominant source of the remaining random variation of FW within a tree is between fruit within a limb. In terms of within-limb sampling strategies, this study provides clear evidence that a systematic sample along a limb gives a more ecient estimator of mean FW compared with random or strati®ed sampling. Monte Carlo re-sampling provided standard error estimates that were about 10 % lower for systematic sampling. Both the systematic and strati®ed sampling, however, may be seriously biased in their estimation of the within-limb variance. Therefore, when both the mean and variance are needed, especially for small sample sizes (say n 5), we recommend simple random sampling. Some methods for extending the limb estimator to the whole tree level are also discussed.

show abstract

Within and between tree variability in fruit characteristics associated with bitter pit incidence of ‘Braeburn’ apple

Cited by 14 publications

References 0 publications

Application of CaCl2 Sprays Earlier in the Season May Reduce Bitter Pit Incidence in 'Braeburn' Apple

Application of CaCl2 Sprays Earlier in the Season May Reduce Bitter Pit Incidence in 'Braeburn' Apple

Die Kalziumversorgung von Äpfeln in Abhängigkeit von pflanzlichen Regelungsvorgängen

Variation of Fruit Size and Growth within an Apple Tree and its Influence on Sampling Methods for Estimating the Parameters of Mid-season Size Distributions

Contact Info

Product

Resources

About