A Study of the Relationship Between the Amount of Bloom and Yield of Apples

Longley, R. P.

doi:10.4141/cjps60-006

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…In mature trees, alternate bearing typically results from poor flower induction during a heavy cropping year (Westwood, 1993) with resultant poor flowering and light cropping the following year. Longley (1960) assessed the relationship between bloom and yield in mature apple trees of several varieties over a 10-year period. He reported a strong linear relationship between bloom intensity and cropping, with very low yields on trees with little bloom.…”

Section: Light Flowering That Limits Croppingmentioning

confidence: 99%

“…The economic disadvantages of excessive cropload have led to considerable research on fruit thinning and widespread commercial application of this practice. In apple, it has been demonstrated that croploads continue to increase even as flowering increases to very high levels (Longley, 1960). Clearly, excessive flowering contributes to the problem of excessive cropping and small fruit size.…”

Section: Excessive Flowering That Produces Excessive Crops Small Frumentioning

confidence: 99%

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Relationship of Flowering Intensity and Cropping in Fruit Species

Stover¹

2000

horttech

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The relationship between intensity of flowering and various aspects of cropping are reviewed for fruit species. Relatively light flowering can limit yield in most fruit species. This commonly occurs in young trees that have not achieved full production and in “off” years for varieties that display alternate bearing. When trees mature, many species will carry fruit numbers that exceed commercially desired levels, resulting in excessively small fruit and accentuating alternate bearing. The economic disadvantages of excess cropload have resulted in considerable research on fruit thinning and widespread commercial application of this practice. Heavy flowering intensity in some crop species results in economic disadvantages beyond the problems of excessive cropload and resultant small fruit size. Many species flower profusely and have initial fruit set that greatly exceeds tree capacity, resulting in abscission of numerous flowers and fruitlets. Abscised organs can represent a substantial amount of carbohydrates and nutrients, compromising availability of these materials at critical periods in flower and fruit development. The potential implications of this process are best exemplified in `Navel' orange [Citrus sinensis (L.) Osbeck], where an increase in flowering beyond intermediate intensity results in a reduction in both initial fruit set and final fruit yield at harvest. In several species, there is evidence that fruit size may be reduced by excessive flowering, even when cropload is quickly adjusted to an acceptable level. These data suggest that further research on the advantages of controlling flowering intensity is warranted.

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Section: Light Flowering That Limits Croppingmentioning

confidence: 99%

Section: Excessive Flowering That Produces Excessive Crops Small Frumentioning

confidence: 99%

Relationship of Flowering Intensity and Cropping in Fruit Species

Stover¹

2000

horttech

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Competition regulates mango fruiting above a floral density threshold

Orr¹,

Ibell

Wilkie

et al. 2023

Scientia Horticulturae

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EFFECT OF FUNGICIDES ON McINTOSH APPLE TREES

Ross¹,

Longley²

1963

Can. J. Plant Sci.

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A 4-year test was carried out on the effect of sprays of captan, dodine, dichlone, and phenyl mercury acetate-captan on the performance of mature McIntosh apple trees. Increases in yield of the same trees over the average yield of the previous 5 years were 40, 31, 18 and 7 per cent, respectively, for captan, dodine, mercury-captan and dichlone. The fungicides had little effect on bloom, tree growth as measured by increase in trunk cross-section, and per cent fruit color. Mercury-captan produced larger apples indicating a thinning effect. The captan sprays produced the most attractive apples. With dichlone, fruit finish was rough. Dodine injured about 3 per cent of the apples in 2 years of the test.Dodine gave the best control of apple scab (Venturia inaequalis). Dichlone was very effective for early fruit scab but did not give good control of late or pin-point scab. Mercury gave excellent control of early scab. Captan allowed some late scab to develop.

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A Study of the Relationship Between the Amount of Bloom and Yield of Apples

Cited by 3 publications

References 2 publications

Relationship of Flowering Intensity and Cropping in Fruit Species

Relationship of Flowering Intensity and Cropping in Fruit Species

Competition regulates mango fruiting above a floral density threshold

EFFECT OF FUNGICIDES ON McINTOSH APPLE TREES

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