Effects of Summer Pruning on Increasing the Rate of Flower Bud Formation in ‘Satonishiki’ Young Sweet Cherry Trees

Prohexadione-Ca (P-Ca) and ethephon (ETH) were evaluated as potential inhibitors of growth and promoters of early flowering for high density orchard management of sweet cherry (Prunus avium L.) trees on vigorous rootstocks. Single applications (P-Ca at 125 to 250 mg·L-1 active ingredient (a.i.) or ETH at 175 to 200 mg·L-1 a.i.) to young, nonfruiting sweet cherry trees produced short-term, generally transient reductions in terminal shoot elongation, and did not stimulate flower bud formation. Tank-mix applications (P-Ca + ETH) usually produced a stronger, possibly synergistic, reduction in shoot growth rate. Single tank-mix applications either increased subsequent flower bud density on previous season shoots or had no effect; when a second application was made three weeks later to the same trees, subsequent flower bud density on previous season shoots and spurs on older wood increased ≈3-fold over untreated trees. Yield efficiency (g·cm2 trunk cross-sectional area) also increased nearly 3-fold. Chemical names used: (2-chloroethyl) phosphonic acid (ethephon); calcium 3-oxido-4-propionyl-5-oxo-3-cyclohexene carboxylate (prohexadione-Ca); polyoxyethylene polypropoxypropanol, dihydroxypropane, 2-butoxyethanol (Regulaid); aliphatic polycarboxylate, calcium (Tri-Fol).

Download Full-text

Timing and Severity of Summer Pruning Affects Flower Initiation and Shoot Regrowth in Sweet Cherry

HortScience ◽

10.21273/hortsci.33.4.647 ◽

1998 ◽

Vol 33 (4) ◽

pp. 647-649 ◽

Cited By ~ 14

Author(s):

Charlotte M. Guimond ◽

Gregory A. Lang ◽

Preston K. Andrews

Keyword(s):

Shoot Growth ◽

Sweet Cherry ◽

Flower Initiation ◽

Flower Buds ◽

Flower Bud ◽

Lateral Shoot ◽

Current Season ◽

Bud Formation ◽

Lateral Shoots ◽

Flower Bud Formation

To examine the effect of timing and severity of summer pruning on flower bud initiation and vegetative growth, 4-year-old `Bing' cherry trees (Prunus avium L.) were pruned at 31, 34, 37, 38, or 45 days after full bloom (DAFB) with heading cuts 20 cm from the base of current-season lateral shoot growth, or at 38 DAFB by heading current-season lateral shoot growth at 15, 20, 25, or 30 cm from the base of the shoot. The influence of heading cut position between nodes also was examined by cutting at a point (≈20 cm from the shoot base) just above or below a node, or in the middle of an internode. Summer pruning influenced the number of both flower buds and lateral shoots subsequently formed on the shoots. All of the timings and pruning lengths significantly increased the number of both flower buds and lateral shoots, but differences between pruning times were not significant. There was significantly less regrowth when shoots were pruned just below a node or in the center of an internode, rather than just above a node, suggesting that the length of the remaining stub may inhibit regrowth somewhat. The coefficient of determination (r2) between flower bud number and regrowth ranged from -0.34 to -0.45. In young high-density sweet cherry plantings, summer pruning may be useful for increasing flower bud formation on current-season shoots. The time of pruning, length of the shoots after pruning, and location of the pruning cut can influence subsequent flower bud formation and vegetative regrowth.

Download Full-text

Effects of Bulb Storage Temperature on Flower-bud Formation and Dormancy Breaking in Interspecific Hybrids of Lilium × formolongi hort. × L. rubellum Baker

Horticultural Research (Japan) ◽

10.2503/hrj.1.165 ◽

2002 ◽

Vol 1 (3) ◽

pp. 165-167 ◽

Cited By ~ 1

Author(s):

Seiichi Suzuki ◽

Koki Kanahama

Keyword(s):

Interspecific Hybrids ◽

Storage Temperature ◽

Dormancy Breaking ◽

Flower Bud ◽

Bud Formation ◽

Flower Bud Formation

Download Full-text

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

Acta Agrobotanica ◽

10.5586/aa.1983.008 ◽

2013 ◽

Vol 36 (1-2) ◽

pp. 83-94 ◽

Cited By ~ 1

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.

Download Full-text

Chemical regulation of sex expression in certain olive cultivars

Acta Agrobotanica ◽

10.5586/aa.1982.018 ◽

2013 ◽

Vol 35 (2) ◽

pp. 185-190 ◽

Cited By ~ 1

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.

Download Full-text

Direct and apparent residual effects of prohexadione - calcium applied to young cropping sweet cherry trees

Acta Agrobotanica ◽

10.5586/aa.2010.010 ◽

2012 ◽

Vol 63 (1) ◽

pp. 87-92 ◽

Cited By ~ 2

Author(s):

Tadeusz Jacyna ◽

Tomasz Lipa

Keyword(s):

Sweet Cherry ◽

Fruit Shape ◽

Residual Effects ◽

Tree Trunk ◽

Flower Bud ◽

Internode Growth ◽

Carry Over ◽

Prohexadione Calcium ◽

Fruit Diameter ◽

Cherry Trees

The same young cropping 'Regina' sweet cherry trees were foliar treated with prohexadione-calcium (Pro- Ca) in two consecutive years at a concentration of [ 125, 125 x 2, 250 ]-(A) and [ 250, 375, 500 ]-(B) mg ProCa l<sup>-1</sup>, respectively. The following year some trees from A-treatments were left untreated to observe carry-over effects (C). None of A-treatments influenced tree trunk, shoot extension and internode growth, whereas B-treatments reduced shoot extension and internode length, simultaneously increasing flower bud density, particularly by 500 mg ProCa l<sup>-1</sup>. There were no carry-over effects produced by C-trees, except some retardation in shoot extension. None of the treatments influenced the tree cropping level. Fruit diameter was reduced by A-treatments, but fruit shape (L/D ratio) and mass were reduced by treatments B, and such reduction was also exhibited by C-trees (residual effects).

Download Full-text