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Table 1.

The critical minimum temperature for apricot in phenological phases of development, °С (average values) for the south of Russia and Zailiyskiy Alatau (Kazakhstan)

Phonological phases of development Temperatures in the North Caucasus (℃) Temperatures in submountain areas of the Republic of Kazakhstan (℃)
Exogenous dormancy January, I, II, –24℃ January, III, – 28℃ February, I, II, – 24 ℃
Swelling of flower buds January, III; February, I, II, –23℃; February, III, –20℃ February, III, – 20℃
Bursting of flower buds March, I, II, –10℃ March, I, II, –10℃
Appearance of petals March, III, –5℃ March, III, –5℃
Blossoming April, I, –3℃ April, I, –3℃
Primordium April, III, –1℃ April, III, –1℃

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