scholarly journals CPPU Influences Fruit Quality and Fruit Abscission of 'McIntosh' Apples

HortScience ◽  
2001 ◽  
Vol 36 (7) ◽  
pp. 1292-1295 ◽  
Author(s):  
Duane W. Greene
Keyword(s):  
Fruit Quality ◽  
Fruit Size ◽  
Soluble Solids ◽  
Flower Bud ◽  
Bud Formation ◽  
Time Of Application ◽  
Red Color ◽  
Series Of Experiments ◽  
Flower Bud Formation ◽  
Fruit Surface

A range of concentrations and timings of CPPU application were evaluated in attempt to identify situations in which fruit size, flesh firmness, and soluble solids could be increased while minimizing increased incidence of fruit asymmetry and reductions in flower bud formation and fruit surface red color on 'McIntosh' apples (Malus×domestica Borkh.). The greatest response to CPPU for most attributes evaluated occurred when it was applied at fruit size between 6 mm and 16 mm. The conclusion from this series of experiments is that differential response to CPPU could not be established by altering the time of application. The response to CPPU is linear with increasing concentration. Results suggested that use of 4 to 6 mg·L-1 CPPU on apples to increase fruit size was the maximum and appropriate range to use without causing fruit asymmetry. Chemical name used: N-(2-chloro-4-pyridyl)-N′-phenyl urea (CPPU)

scholarly journals Chemical regulation of sex expression in certain olive cultivars

2013 ◽  
Vol 35 (2) ◽  
pp. 185-190 ◽  
Author(s):  
E. S. Hegazi ◽  
G. R. Stino
Keyword(s):  
Growth Regulators ◽  
Sex Expression ◽  
Bud Burst ◽  
Flower Bud ◽  
Bud Formation ◽  
Noticeable Increase ◽  
Time Of Application ◽  
Olive Cultivars ◽  
Modifying Effect ◽  
Flower Bud Formation

The modifying effect of growth regulators on bud burst, flower bud formation and sex expression in olives varies greatly according to cultivar, concentration and time of application. Cycocel 200, 500 mg/l, ethephon 200 mg/l and SADH 2000 mg/l stimulated bud burst and flower bud formation in the 'Blanquetta' cv. A noticeable increase in the percentage of perfect flowers was obtained by 100 mg/l of kinetin, and 200 mg/l of Cycocel in the cv. 'Picual', Ethephon 200/1, Cycocel 200 mg/l and SADH 2000 mg/l considerably increased the percentage of perfect flowers in the cvs 'Blanquetta', 'Serrana' and 'Picual'. Treatments at green cluster stage were not effective.

scholarly journals A REVIEW OF METHODS TO CONTROL VEGETATIVE GROWTH OF APPLE TREES

HortScience ◽  
1991 ◽  
Vol 26 (5) ◽  
pp. 482c-482
Author(s):  
Duane W. Greene
Keyword(s):  
Fruit Quality ◽  
Vegetative Growth ◽  
Fruit Set ◽  
Growth Control ◽  
Flower Bud ◽  
Apple Trees ◽  
Bud Formation ◽  
Control Growth ◽  
Management Techniques ◽  
Flower Bud Formation

The trend toward planting high density apple orchards continues. Closer tree spacing requires a greater degree of growth control to reduce shading and to prevent the decline in fruit quality and productivity as the planting become older. Chemical, rootstock, pruning, and management techniques will be reviewed that may control growth directly by reducing vegetative growth or indirectly through effects on increasing flower bud formation and fruit set. Pruning and management techniques will be discussed that can selectively reduce vigor in the tops of trees while allowing growth of the less vigorous lower portion of a trees to continue.

scholarly journals 659 Reducing Floral Initiation and Return Bloom in Fruit Trees— Applications and Implications in Fruit Production: Pome Fruit

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 561E-561
Author(s):  
Duane W. Greene
Keyword(s):  
Fruit Set ◽  
Fruit Size ◽  
Fruit Trees ◽  
Fruit Production ◽  
Alternative Methods ◽  
Pome Fruit ◽  
Flower Bud ◽  
Bud Formation ◽  
Biennial Bearing ◽  
Flower Bud Formation

Pome fruit display a biennial bearing tendency that is characterized by heavy flowering and fruit set one year followed by a year with reduced bloom and fruit set. This tendancy results in a year with heavy cropping with small fruit, and a subsequent year with large fruit and a small crop. Both situations are undesirable. Chemical thinners in the “on” year are frequently used to modify this cropping behavior. Alternative methods to control cropping by flower bud inhibitions will be discussed. Gibberellin application in the “off” year at or soon after bloom will inhibit flower bud formation and encourage moderate flowering. This method of crop regulation has been used infrequently. Gibberellins differ in their ability to inhibit flowering. Therefore, selection of a specific gibberellin and an effective concentration range may provide greater flexibility in controlling flowering. The cytokinins CPPU and thidiazuron inhibit flower bud formation, increase fruit size, and also thin fruit. Appropriate application of these cytokinins will be discussed where beneficial effects on fruit size may be achieved while maintaining a moderate level of flower bud formation.

scholarly journals Effect of Foliar Application of GA3 on the Flower Bud Formation and Fruit Quality of Satsuma Mandarine (C. unshiu Marc. cv. Miyagawa)

2013 ◽  
Vol 32 (4) ◽  
pp. 343-347 ◽  
Author(s):  
Seok-Beom Kang ◽  
Young-Eel Moon ◽  
Seung-Gab Han ◽  
Yong-Ho Kim ◽  
Chi-Won Chae ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Foliar Application ◽  
Flower Bud ◽  
Bud Formation ◽  
Flower Bud Formation

scholarly journals Factors influencing flower bud formation on the pear tree cultivar 'Doyenne du Comice'. I. Shoot growth and flower bud differentiation on trees sprayed with chlormequat and unsprayed ones

2013 ◽  
Vol 36 (1-2) ◽  
pp. 83-94 ◽  
Author(s):  
Franciszka Jaumień
Keyword(s):  
Shoot Growth ◽  
Apple Tree ◽  
Flower Buds ◽  
Flower Bud ◽  
Bud Formation ◽  
Pear Tree ◽  
Factors Influencing ◽  
Long Shoots ◽  
Flower Bud Differentiation ◽  
Flower Bud Formation

The growth of trees sprayed in spring with chlormequat is weaker, and their elongation growth ends 2 - 3 weeks earlier than that of unsprayed trees. Trees with growth inhibited by chlormequat set flower buds on the spurs and in the subapical part of long shoots. The course of flower bud differentiation starts in the second half of July and is similar to that in the apple tree.

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