Oxidative Processes in Bud Dormancy and the Use of Hydrogen Cyanamide in Breaking Dormancy

Shulman, Y.; Nir, G.; Lavee, S.

doi:10.17660/actahortic.1986.179.11

Cited by 59 publications

(38 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…North (1993) also concluded that the lack of effect of HCN on fruit size in 'Golden Delicious' was because of the influence of thinning practices. Shulman et al (1986) found high concentrations of HCN (Dormex®) to be phytotoxic, with concentrations of 2.5% Dormex® resulting in dieback of twigs in apples. The 3% rate used in the first year of this work showed similar effects, particularly when applied close to budburst.…”

Section: Discussionmentioning

confidence: 99%

“…Preliminary work in Brazil (Petri 1989) has shown that application of hydrogen cyanamide (HCN) can break the winter dormancy of apple trees, as well as increase fruit weight as a result of earlier budbreak. Shulman et al (1986) and North (1993) also reported the rest breaking effects of HCN in apple. HCN has also been used to shorten the flowering period and overcome insufficient chilling in kiwifruit (Hampton & Parker 1992;Richardson et al 1994), peach (Powell & Lyons 1994), and blueberry (Williamson et al 2002).…”

Section: Introductionmentioning

confidence: 95%

See 1 more Smart Citation

Hydrogen cyanamide impacts on flowering, crop load, and fruit quality of red ‘Fuji’ apple (Malus domestica)

Bound¹,

Jones

2004

New Zealand Journal of Crop and Horticultural Science

View full text Add to dashboard Cite

The extended flowering period of many apple (Malus domestica) cultivars often causes problems in the management of crop load. Hydrogen cyanamide (Dormex ® ) was examined over a 2-year period for its effect on flowering, crop load, fruit size, and quality of 'Fuji' apple. In Year 1, hydrogen cyanamide was applied at 5 application times (40, 30, 20, 10, or 0 days before estimated budburst (dBEB)) at 3% v/v. These treatments were compared with an untreated control. In Year 2, hydrogen cyanamide was applied at 1%, 2%, or 3% v/v at either 40 or 30 dBEB. The blossom thinner ethephon was applied to all hydrogen cyanamide treated trees at full bloom. An untreated control, a hand-thinned treatment, and a chemically thinned control were also included. Hydrogen cyanamide advanced flowering in both years when applied at 40 or 30 dBEB. In Year 1, full bloom was advanced by more than 1 week and the flowering period from pink bud to full bloom compressed by the 40 dBEB application, resulting in a very clearly defined full bloom date. Application of hydrogen cyanamide at budburst or 10 dBEB resulted in extended flower development and some bud scorching. Unseasonally warm spring weather conditions in the second year resulted in an abnormally short flowering period. It would appear that under these conditions hydrogen cyanamide can still be used to advance flowering but is not necessary to compress the flowering period. Hydrogen cyanamide reduced fruit set in the first year but not the second. Most treatments showed no detrimental effect on fruit quality. There was no evidence of any negative interactions between HCN and ethephon.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Hydrogen cyanamide impacts on flowering, crop load, and fruit quality of red ‘Fuji’ apple (Malus domestica)

Bound¹,

Jones

2004

New Zealand Journal of Crop and Horticultural Science

View full text Add to dashboard Cite

show abstract

“…The development of hydrogen cyanamide (HCN) in the 1980's as a RBA resulted in cyanamide becoming commercially useful as a rest breaking spray (Shulman et al, 1986). HCN has been shown to be effective in the breaking of dormancy in sweet cherries (Snir & Erez, 1988;Costa et al, 2004).…”

Section: Effect Of Timing and Concentration Of Rest Breaking Agents Omentioning

confidence: 99%

Effect of timing and concentration of rest breaking agents on budburst in ‘Bing’ sweet cherry under conditions of inadequate winter chilling in South Africa

Sheard

Johnson

Cook³

2009

South African Journal of Plant and Soil

View full text Add to dashboard Cite

The effect of timing of various rest breaking agents (RBAs) on vegetative and floral budburst, and production efficiency was investigated on 4-year-old 'Bing' sweet cherry trees on 'Gisela ® 5' rootstock. Two experiments were conducted, near Clarens (28°28'S; 28°19'E, 1860 m.a.s.l) and Reitz (28°0'S; 28°28'E; 1717 m.a. Compared to the control, RBAs were most effective at improving vegetative budburst during both seasons while results of floral budburst and production efficiency varied between seasons indicating that time of RBA application should be based on chilling accumulation and bud development stage and not only calendar date. The time of application of RBAs had the most significant influence on budburst and production efficiency. No interaction was observed between time and treatment.

show abstract

“…Liang et A. R. Ferguson 'Hayward') is often limited by inadequate winter chilling (Linsley-Noakes & Allan 1987). When hydrogen cyanamide (HC) is applied to dormant vines, the amount of budbreak and flowering increases and it has been used to offset the effects of poor winter chilling in a range of countries including: New Zealand (Henzell & Briscoe 1986); Israel (Shulman et al 1986); Australia (Paulin & McHattie 1989); Chile (Lockwood 1989); South Africa (Linsley-Noakes 1989); Brazil (Shuck & Petri 1995); and Italy (Costa et al 1997). Some consider the application of HC to be the management practice that currently has the greatest single effect on the profitability of kiwifruit production in New Zealand.…”

Section: Introductionmentioning

confidence: 99%

Effects of hydrogen cyanamide on budbreak and flowering in kiwifruit (Actinidia deliciosa’Hayward')

McPherson

Richardson²,

Snelgar

et al. 2001

New Zealand Journal of Crop and Horticultural Science

View full text Add to dashboard Cite

Effects of hydrogen cyanamide (HC) application to kiwifruit (Actinidia deliciosa (A. Chev.) C.F. Liang et A. R. Ferguson 'Hayward') vines were assessed over four seasons in three New Zealand kiwifruit-growing areas. HC advanced the date of budbreak to c. 40 days after application, despite the date of application varying from 33 to 92 days before natural budbreak. For every day that HC advanced budbreak, there was a 0.5-day advance in the date of flowering (r 2 = 0.92). The smaller advance in flowering resulted from the cooler temperatures experienced between budbreak and flowering in the treated vines. HC applications tended to reduce the spread of budbreak and flowering, with the greatest effect at the warmest sites. H01011 Received 19 March 2001; accepted 20 August 2001Application of HC usually increased budbreak and the total number of flowers at the warmest two sites, but only slightly reduced their seasonal variation as this was largely the result of the amount of winter chilling vines received. The number of flowers per winter bud produced by untreated vines was reduced by 0.44 per 1°C. The percentage of total flowers that were lateral or side flowers was reduced by HC application from 14 to 4% at the warmest site and 29 to 19% at the coolest site.

show abstract

Oxidative Processes in Bud Dormancy and the Use of Hydrogen Cyanamide in Breaking Dormancy

Cited by 59 publications

References 0 publications

Hydrogen cyanamide impacts on flowering, crop load, and fruit quality of red ‘Fuji’ apple (Malus domestica)

Hydrogen cyanamide impacts on flowering, crop load, and fruit quality of red ‘Fuji’ apple (Malus domestica)

Effect of timing and concentration of rest breaking agents on budburst in ‘Bing’ sweet cherry under conditions of inadequate winter chilling in South Africa

Effects of hydrogen cyanamide on budbreak and flowering in kiwifruit (Actinidia deliciosa’Hayward')

Contact Info

Product

Resources

About