Peach Cultivars in Florida and Their Chilling Requirements

Sharpe, R. H.; Sherman, W. B.; Martsolf, J. D.

doi:10.17660/actahortic.1990.279.21

Cited by 15 publications

(11 citation statements)

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“…This generated a strong chilling-negation effect, yielding only about 23% net chilling accumulation and explains the relatively low amount of CU reported in this study. This is inconsistent with the observed phenological behavior and confirms that the Utah model is not suitable for simulating dormancy evolution of temperate fruits in tropical climates (Guardian and Biggs, 1964; Pèrez et al, 2008;Sharpe, 1969;Rouse and Sherman, 2003;Sharpe et al, 1990). On the other hand, the Mean Temperature model (considering the period 15 June-15 July as the coldest month) seemed to estimate higher chilling unit accumulation than the Utah model (Table 2).…”

Section: Tree Phenologymentioning

confidence: 84%

“…Another approach is the Mean Temperature model based on the relationship between the mean monthly temperature of the coldest month and total chill accumulation (Sharpe et al, 1990;Weinberger, 1956). The model uses either the temperature of the coldest month or the one of the two coldest months in winter to estimate chill accumulation and has given better results than the standard Utah model in those areas with low chill accumulation (Byrne and Bacon, 1992).…”

Section: Introductionmentioning

confidence: 99%

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Climatic Characterization and Phenology of Local Peach Genotypes in the Udzungwa Uplands of Tanzania

Scalisi

Bianco

Pernice

et al. 2014

International Journal of Fruit Science

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The phenology of two local peach genotypes was studied to verify whether peaches can be produced in the Tanzanian uplands. Observations were conducted on trees of one early-and one late-ripening peach genotype in 2010 and 2011. Temperature trends were reconstructed and three chilling estimation models were tested. The two peach genotypes differed for timing of flower and leaf bud-break. Common symptoms of insufficient chilling (presence of numerous stages at a specific date and about 20% of undeveloped flower buds) were observed in the late genotype. Both Utah and Dynamic models indicated low chilling accumulation, lower than the Mean Temperature model in most cases. This is inconsistent with the actual phenology, suggesting that (1) both models show some limitations under our conditions, (2) the two genotypes partly adapted to the local climate, and (3) mechanisms other than chilling (seasonal rainfall fluctuations) play a role in rest control.

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Section: Tree Phenologymentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Climatic Characterization and Phenology of Local Peach Genotypes in the Udzungwa Uplands of Tanzania

Scalisi

Bianco

Pernice

et al. 2014

International Journal of Fruit Science

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“…There are several models used to calculate chill hours ( for examples please see Richardson, Seeley, and Walker 1974;Sharpe, Sherman, and Martsolf 1990;Weinberger 1956). One model in particular that defines a chill unit as 1 hour below 45°F (7°C) but above 32°F (0°C) works well for determining ranges of accumulation in low-chill peaches.…”

Section: Fruit Developmental Periods and Chill Accumulationmentioning

confidence: 99%

“…The fruit ripen about 7-10 days earlier than 'TropicBeauty' in Gainesville, Florida with an FDP of 78 days. Adapted from Weinberger (1956) and Sharpe (1990). Areas with this Jan. mean temperature or a lower one will provide sufficient chilling to grow this peach successfully.…”

Section: Cultivar Descriptionsmentioning

confidence: 99%

Florida Peach and Nectarine Varieties

Olmstead

Chaparro

Andersen

et al. 2013

EDIS

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The University of Florida has developed high-quality, low-chilling, early maturing peach and nectarine cultivars that can be grown from the panhandle of Florida to as far south as Immokalee. Low-chilling cultivars can grow and produce fruit under Florida conditions that are much warmer in winter than in northern states. Furthermore, ripening of these cultivars during April and May ensures an early spring market window for tree-ripe fresh fruit in Florida before peaches and nectarines from other southeastern states and California come to market. Both commercial and dooryard recommended varieties span the growing season. This 8-page fact sheet was written by Mercy Olmstead, Jose Chaparro, Pete Andersen, Jeff Williamson, and James Ferguson, and published by the UF Department of Horticultural Sciences, May 2013. http://edis.ifas.ufl.edu/mg374

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“…This is based on full bloom consistently occurring just before 'Sunlite' nectarine at Attapulgus where full bloom occurs most seasons in mid-February (Table 1). 'Gulfcrimson' has fruited well where the coldest month averages 12 to 14°C (Sharpe et al, 1990) and in colder locations in the absence of spring frosts. Thus, we expect this new peach to be adapted in areas where 'Flordaking' and 'Sunlite' nectarine have been grown successfully.…”

Section: Descriptionmentioning

confidence: 99%