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

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dc.contributor.authorSheard A.G.
dc.contributor.authorJohnson S.D.
dc.contributor.authorCook N.C.
dc.date.accessioned2011-05-15T15:55:00Z
dc.date.available2011-05-15T15:55:00Z
dc.date.issued2009
dc.description.abstractThe 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.s.l) in the eastern Free State, during 2005 and 2006, respectively. The 2005 experiment evaluated five treatments; 1 % and 2% Dormex® (49% hydrogen cyanamide, HCN); 1% Dormex® + 3% Budbreak® oil (869.3 g L-1 mineral oil); and 3% Lift® (thidiazuron and mineral oil) sprayed on whole trees on three dates preceding expected "green- tip", and an unsprayed control. In 2006 four treatments were evaluated; 1 % Dormex®; 1 % Dormex® + 3% Bud- break® oil (869.3 g L-1 mineral oil); 3% Lift® applied on three dates, and an unsprayed control. 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.
dc.description.versionArticle
dc.identifier.citationSouth African Journal of Plant and Soil
dc.identifier.citation26
dc.identifier.citation2
dc.identifier.issn2571862
dc.identifier.urihttp://hdl.handle.net/10019.1/9523
dc.subjectbudburst
dc.subjectclimate conditions
dc.subjectcrop production
dc.subjectdevelopmental biology
dc.subjectdicotyledon
dc.subjectexperimental study
dc.subjectrootstock
dc.subjectAfrica
dc.subjectSouth Africa
dc.subjectSouthern Africa
dc.subjectSub-Saharan Africa
dc.subjectPrunus
dc.subjectPrunus avium
dc.titleEffect of timing and concentration of rest breaking agents on budburst in 'Bing' sweet cherry under conditions of inadequate winter chilling in South Africa
dc.typeArticle
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