Floral and Vegetative Bud Development of ‘Sungold’ and ‘Sunlite’ Nectarine as influenced by Evaporative Cooling by Overhead Sprinkling during Rest1

Gilreath, Phyllis R.; Buchanan, D. W.

doi:10.21273/jashs.106.3.321

Cited by 15 publications

(3 citation statements)

References 5 publications

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“…Further reasons for inaccuracies may be that cultivars may differ in their apparent base temperature and in their heat requirements for floral bud break [ 35 , 36 ]. To a small extent, bloom dates obtained from different locations may also be affected by differences in tree vigor caused by variation in training systems and tree densities, or by other environmental factors, such as water conditions [ 37 , 38 ].…”

Section: Resultsmentioning

confidence: 99%

Impact of Chill and Heat Exposures under Diverse Climatic Conditions on Peach and Nectarine Flowering Phenology

Drogoudi¹,

Cantín

Brandi³

et al. 2023

Plants

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The present study aims to generalize cultivar-specific tree phenology responses to winter and spring temperatures and assess the effectiveness of the Tabuenca test and various chill and heat accumulation models in predicting bloom dates for a wide range of climatic conditions and years. To this end, we estimated the dates of rest completion and blooming and correlated them with observed bloom dates for 14 peach and nectarine cultivars that were evaluated in 11 locations across Europe (Greece, France, Italy, Romania and Spain), within the EUFRIN cultivar testing trial network. Chill accumulation varied considerably among the studied sites, ranging from 45 Chill Portions (CP) in Murcia-Torre Pacheco (Spain) to 97–98 CP in Cuneo (Italy) and Bucharest (Romania). Rest completion occurred latest or was not achieved at all for some cultivars in the southern sites in Murcia. Dormancy release happened earliest in Bucharest and Cuneo, sites where heat accumulation had a strong influence on the regulation of bloom time. Blooming occurred earliest in the moderately cold regions of Lleida (Spain) and Bellegarde (France), and 7–11 days later in the warmer locations of Rome (Italy) and Naoussa (Greece), suggesting that bloom timing is strongly influenced by delayed rest completion in these locations. The Dynamic Model resulted in both more homogeneous chill accumulation across years and better predictions of bloom dates, compared with the Utah, Positive Utah and Chilling Hours models. Prediction of bloom dates was less successful for low-chill cultivars than for medium- and high-chill cultivars. Further climatic and experimental data are needed to make estimates of the climatic needs of peach cultivars more robust and to generate reliable advice for enhancing the resilience of peach production under varying and changing climatic conditions.

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Section: Resultsmentioning

confidence: 99%

Impact of Chill and Heat Exposures under Diverse Climatic Conditions on Peach and Nectarine Flowering Phenology

Drogoudi¹,

Cantín

Brandi³

et al. 2023

Plants

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show abstract

“…This system is in use for delaying bloom when applied after rest completion (1,2) and for reducing excessive foliage and fruit tem perature (8). Recently, EC was tried also as a means to improve budbreak by operating the system when the temperature rose above 10°C (6,7). This paper reports preliminary data obtained with evaporative cooling dur ing warm winter days in Israel.…”

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confidence: 99%

“…It seems also that un der their conditions, counteracting high day temperature was an important cause for the favorable effect obtained. Since they failed to predict the date of the rest termination for the sprinkled treatment using various models (7), they suggest that other factors are also involved in breaking bud rest when using overhead sprinkling. It still could be that the models used are not accurate enough or that the cause for the response observed could have been other than reduced daytime tem perature, as proposed by Westwood and Bjornstad (9).…”

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confidence: 99%