Tolerance of peach flower buds to low sub-zero temperatures in winter

https://doi.org/10.17221/206/2015-HORTSCICitation:Szymajda M., Żurawicz E. (2016): Tolerance of peach flower buds to low sub-zero temperatures in winter. Hort. Sci. (Prague), 43: 126-133.
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After each of three consecutive winters, 2010/2011, 2011/2012 and 2012/2013, the extent of frost damage to flower buds was studied in 25 genotypes of peach growing in the collection of varieties in the Experimental Orchard in Dąbrowice near Skierniewice (central Poland). The lowest temperatures during those winters were quite similar: –22.3°C (February 22, 2011), –23.3°C (February 3 and 4, 2012), and –21.4°C (March 24, 2013). However, after the winters of 2010/2011 and 2011/2012 the extent of damage to peach flower buds was much larger than after the 2012/2013 winter. This was caused by different weather patterns during those winters. During the 2010/2011 and 2011/2012 winters, before the occurrence of the lowest temperature, there were periods of above-zero temperatures, which resulted in a reduction in tolerance of flower buds to severe winter frosts. During the 2012/2013 winter, sub-zero temperatures persisted for most of the time, which helped the flower buds to maintain high tolerance to low sub-zero temperatures until late March.
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