1 |
Pollen transmission of Cherry leafroll virus in sweet cherry (Prunus avium L.)Hou, Hui, January 2006 (has links) (PDF)
Thesis (M.S. in plant pathology)--Washington State University, December 2006. / Includes bibliographical references (p. 67-70).
|
2 |
Causes of and practical strategies for reducing sweet cherry polycarpyMartin, Rolando, January 2008 (has links) (PDF)
Thesis (M.S. in horticulture)--Washington State University, December 2008. / Title from PDF title page (viewed on Mar. 2, 2009). "Department of Horticulture and Landscape Architecture." Includes bibliographical references.
|
3 |
Manipulation of the chilling requirement of sweet cherry trees /Kapp, Cornelius Johannes. January 2008 (has links)
Thesis (MScAgric)--University of Stellenbosch, 2008. / Bibliography. Also available via the Internet.
|
4 |
Factors leading to poor fruit set and yield of sweet cherries in South Africa /Sheard, Andrew Grant. January 2008 (has links)
Thesis (MScAgric)--University of Stellenbosch, 2008. / Bibliography. Also available via the Internet.
|
5 |
Radiation-induced mutations in sweet cherry, (Prunus avium L.) cvs Napoleon and BingSaamin, Shaharudin 03 October 1986 (has links)
Graduation date: 1987
|
6 |
The impact of deficit irrigation strategies on sweet cherry (Prunus avium L) physiology and spectral reflectanceAntunez-Barria, Alejandro Jose, January 2006 (has links) (PDF)
Thesis (Ph. D.)--Washington State University, December 2006. / Includes bibliographical references.
|
7 |
Storage nitrogen manipulations in sweet cherry (Prunus avium L.) on dwarfing rootstocksOuzounis, Theoharis. January 2008 (has links)
Thesis (M.S.)--Michigan State University. Dept. of Horticulture, 2008. / Title from PDF t.p. (viewed on July 28, 2009) Includes bibliographical references. Also issued in print.
|
8 |
Factors leading to poor fruit set and yield of sweet cherries in South AfricaSheard, Andrew Grant 03 1900 (has links)
Thesis (MScAgric (Horticulture))--Stellenbosch University, 2008. / Sweet cherries (Prunus avium L.) have a high chilling requirement and grow best in areas receiving >1 100 Utah chill units during winter. The main production areas in South Africa, and particularly the eastern Free State, frequently receive insufficient winter chilling and late spring frosts leading to problems of poor budburst, flowering, floral abnormalities and poor fruit set. Research was conducted on the cultivar ‘Bing’ to determine the main factors causing its low fruit set. Various trials were conducted to optimize the timing of rest breaking agents, identify suitable cross pollinizers that flower synchronously with ‘Bing’, and evaluate the influence of temperature and pollen-pistil interactions on fertilization and fruit set.
Pollen biology studies using 2- to 3-year-old ‘Bing’ sweet cherry trees were conducted near Clarens, eastern Free State, during the 2005 and 2006 seasons to determine the most suitable cross pollinizer/s for ‘Bing’ and to assess the influence of temperature and pollen-pistil interactions on pollen tube growth and ovule longevity. Significant differences in pollen germination (‘rates’ deleted) occurred between pollinizers, although differences were noted in pollen performance on the stigma and style (in vivo) compared to the artificial media (in vitro), indicating a lack of correlation between in vitro germination and in vivo pollen-pistil interactions. Pollen tube growth, following cross pollination, was influenced by pollinizer genotype, temperature, and the number of pollen grains deposited on the stigma. The highest pollen tube growth rates in ‘Bing’ styles were recorded for the pollinizers ‘Black Tartarian’ (2006), ‘Lapins’ and ‘Rainier’ sweet cherry cultivars at temperatures of approximately 21°C. Temperature had the most significant influence on ovule longevity with the lower orchard temperatures extending ovule viability compared to the higher laboratory temperatures, although pollen tube growth rates were also reduced, thus shortening the effective pollination period. Cross pollination was also shown to extend ovule viability. The results indicate that ‘Black Tartarian’, ‘Lapins’ and ‘Rainier’ were the most suitable pollinizers for ‘Bing’. Hand-pollination with pollen from these donors resulted in a several-fold increase in seed set over naturally-pollinated control flowers. It appears that the principle factors causing poor fruit set in ‘Bing’ sweet cherry are premature abortion of the ovule before fertilization and inadequate transfer of sufficient viable pollen under orchard conditions.
Rest breaking trials were conducted on 4-year-old ‘Bing’ sweet cherry trees on ‘Gisela® 5’ rootstock near Clarens (28°28’S; 28°19’E, 1860m) and Reitz (28°0’S; 28°28’E; 1717m) in the eastern Free State, South Africa, during the 2005 and 2006 seasons respectively. In 2005 five treatments were evaluated; viz. 1% and 2% Dormex® (hydrogen cyanamide, HCN); 1% Dormex® + 3% mineral oil; and 3% Lift® (thidiazuron and mineral oil) sprayed at three dates (29 July 2005, 5 August 2005 and 12 August 2005) preceding expected the “green-tip” stage of flower development, plus an unsprayed control. In 2006 four treatments were evaluated; viz. 1% Dormex®; 1% Dormex® + 3% mineral oil; 3% Lift® applied on three dates (26 July 2006, 7 August 2006 and 12 August 2006) and an unsprayed control. No interaction was observed between time of application and type of rest breaking agent (RBA). RBAs were effective at improving budburst and yield during both seasons with the time of application of RBAs having the most significant influence on budburst and production efficiency in ‘Bing’ sweet cherry trees. RBAs were most effective at improving vegetative budburst when applied 9 to 16 days before the (‘actual’ deleted) “green-tip” stage of flower development. Floral budburst and yield were increased by 1% Dormex® + 3% mineral oil and 3% Lift®, but results varied between seasons indicating that time of RBA application should be based on chilling accumulation and bud development stage and not based on calendar date.
This current research suggests that ‘Bing’ sweet cherry is poorly suited climatically to the current production areas of the eastern Free State and short-term research needs to identify methods of improving chilling and fruit set by means of evaporative cooling and fruit set-enhancing plant growth regulators. Longer term work requires the identification of new, lower chill cultivars with improved climatic adaptation to South African conditions.
|
9 |
Response of apple, peach, and sweet cherry to mechanical blossom thinningSauerteig, Kendra A. 29 March 2012 (has links)
Crop load management of fruit trees is a challenge for producers. For this experiment apple, peach, and sweet cherry trees were thinned using mechanical blossom thinning (MBT), and hand blossom thinning (HBT) to mimic MBT. Apple bloom was reduced by MBT, but only one treatment consistently reduced fruit set. Marketable yield, fruit weight, and quality were unaffected by thinning treatments. An apple spur leaf study found that damage from MBT was negligible. Mechanical blossom thinning of peach significantly reduced fruit set and hand thinning requirements at ‘June drop’. Marketable yield, fruit firmness, and soluble solids concentration were largely unaffected by thinning treatments, but fruit weight and size increased in one year. The two highest rates of sweet cherry MBT and HBT reduced fruit set but total yield, fruit weight, and quality were unaffected. Overall, MBT may be a viable option for tree fruit producers, especially peach growers. / The University of Guelph/OMAFRA Sustainable Production Systems Research Programme, the Niagara Peninsula Fruit and Vegetable Growers' Association, NSERC.
|
10 |
Genetic relationships and pollination studies in sweet cherry (Prunus avium L) / Andrew Granger.Granger, Andrew January 1995 (has links)
Bibliography: leaves 143-150. / xxii, 150 leaves : col. ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Isozyme analysis was carried out on sweet cherry (Prunus avium) leaves. Cultivars were identified and compared. Progeny from controlled hybridisations were examined to determine inheritance patterns of isozymes. Isozymes were also used to determine gene flow in cherry orchards and to determine pollen donors of selected cultivars. / Thesis (Ph.D.)--University of Adelaide, Dept. of Horticulture, Viticulture and Oenology, (1996?)
|
Page generated in 0.0494 seconds