The Relationship Between Vegetative Growth and Fruiting in Apple Trees

Forshey, C. G.; Elfving, D.C.

doi:10.1002/9781118060841.ch7

Cited by 167 publications

(82 citation statements)

References 223 publications

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“…However, this effect resulted from the reduction in the number of small fruits caused by fruit thinning rather than from a direct stimulus to fruit growth of the remaining fruits. These results are similar to those previously observed in medium to high-chilling cultivars (Embree et al, 2007;Link, 2000;Treder, 2008Treder, , 2010Volz, 1988) and provide further support to the hypothesis that the total fruit yield of apple trees is affected more by the number of fruits than by mean fruit weight (Forshey and Elfving, 1989;Elfving and Schechter, 1993).…”

Section: Discussionsupporting

confidence: 89%

Crop loading studies on ‘Caricia’ and ‘Eva’ apples grown in a mild winter area

Castro

Álvarez

Gabriel

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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ABSTRACT:The crop load level of an apple (Malus × domestica Borkh.) tree impacts fruit yield and quality parameters, tree vigor and biennial bearing. The optimal crop load is that which allows for consistent annual cropping and fruit quality acceptable to the market. We evaluated the effect of crop load on yield and fruit quality of two low-chill apples cv. 'Caricia' and 'Eva', growing in a mild winter area. During 2010 and 2011 crop load was manually adjusted from 2 or 3 to 17 fruits cm −2 of trunk cross-sectional area (TCSA). Fruit yield was positively related to crop load in both cultivars but mean fruit weight diminished as the crop load increased. For both cultivars, the production of non-commercial and small-sized fruit increased, whereas production of middlesized fruit diminished as the fruit load increased. Shoot length was not affected by crop load in 'Eva' whereas it was reduced in 'Caricia'. Red skin color (RSC %) had a quadratic response to crop load in 'Caricia'. On the other hand, the RSC % of 'Eva' fruit was adjusted to a negative logarithmic model as an effect of crop load increment. No biennial bearing was observed in either cultivar. This research study suggests that the maximum limit of crop load for both cultivars is 7 fruits cm −2 of TCSA, and the lower limit of crop load was 3 fruits cm −2 of TCSA for 'Eva' and 5 fruits cm −2 of TCSA for 'Caricia'.

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Section: Discussionsupporting

confidence: 89%

Crop loading studies on ‘Caricia’ and ‘Eva’ apples grown in a mild winter area

Castro

Álvarez

Gabriel

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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“…Therefore, proper agricultural measures are necessary to ensure development of such area (104). At a young age and under special conditions, trees of some apple cultivars initiate flower buds on the tops of the long shoots and laterally in the axils of their leaves (37). The flower buds in apple, apical or lateral, are mixed and they contain primordia of vegetative and reproductive organs.…”

Section: Sites Of Flower Bud Formationmentioning

confidence: 99%

“…Most of the commercially significant apple cultivars bear fruit mainly on spurs (37). The main leaf area of the trees from the 'green apex' phase to the complete bloom is formed on these spurs.…”

Section: Sites Of Flower Bud Formationmentioning

confidence: 99%

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Flower Induction and Flower Bud Development in Apple and Sweet Cherry

Koutinas

Pepelyankov

Lichev

2010

Biotechnology & Biotechnological Equipment

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“…The control of vegetative development is also very important in terms of adequate flower bud formation. There is an antagonistic relationship between shoot length and flowering (Forshey & Elfving 1989;Tromp 2005).…”

Section: Introductionmentioning

confidence: 99%

Impact of Repeated Yearly Applications of Prohexadione-Calcium On Vegetative and Reproductive Growth of ‘Golden Delicious’/M.9 Apple Trees

Atay¹,

Koyuncu

2017

Journal of Horticultural Research

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Growth retardants have great potential to balance between vegetative and reproductive growth. To assess the effects of prohexadione-calcium (Pro-Ca, Regalis) on reproductive and vegetative growth, return bloom, fruit set, and also fruit quality in 'Golden Delicious' apple grafted on M.9 rootstock, an experiment was performed during 2010-2012. The applications of 125 mg dm -3 Pro-Ca on the same trees in each year resulted in a 40-43% shoot length reducing. Internodes length decreased with Pro-Ca at about 30%, while total node number was unaffected. Results indicate that Pro-Ca applications have no effects on tree trunk growth, flowering, yield, fruit set and development. Pro-Ca also didn't have any negative impact on fruit quality during the three consecutive years. Moreover, Pro-Ca resulted in higher fruit size compared to control in the third year of trial. The results of this experiment clearly suggest that fruit growers can use ProCa for the control of vegetative growth without having any negative effects on fruit quality and yield parameters. Once a full canopy has been achieved, annual shoot growth can be suppressed in the range of 20 to 30 cm with 125 mg dm -3 Pro-Ca treatment in 'Golden Delicious' apple trees.

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The Relationship Between Vegetative Growth and Fruiting in Apple Trees

Cited by 167 publications

References 223 publications

Crop loading studies on ‘Caricia’ and ‘Eva’ apples grown in a mild winter area

Crop loading studies on ‘Caricia’ and ‘Eva’ apples grown in a mild winter area

Flower Induction and Flower Bud Development in Apple and Sweet Cherry

Impact of Repeated Yearly Applications of Prohexadione-Calcium On Vegetative and Reproductive Growth of ‘Golden Delicious’/M.9 Apple Trees

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