L. Szalay, SZ. Németh, B. Timon, GY. Végvári
The determination of the frost resistance and winter hardiness of peach and apricot varieties is an important task in Hungary, as production can only be competitive if the location and variety are wisely chosen. Various overwintering organs of trees have very different levels of frost resistance, and this resistance also varies greatly over time. During dormancy flower buds are the most frost sensitive organs of peach and apricot trees. From the practical point of view frost resistance and winter hardiness of the flower buds deserve detailed study. The development rate of the overwintering organs of peach and apricot varieties and changes in their frost resistance during the dormancy period have been regularly investigated in recent years in the gene bank collection of Corvinus University of Budapest. The present paper provides an analysis of frost hardiness of flower buds based on the results obtained in three consecutive winters with very diverse weather conditions. The hardening processes of overwintering organs are fundamentally determined by environmental factors, particularly by temperature. Thus, even at the same location, the development rate of the flower buds and the development of frost resistance may differ from year to year. The determination of the maximum frost resistance genetically attainable and the description of changes in frost resistance are only possible in a series of experiments over several years.
Szalay, L., Németh, SZ., Timon, B. and Végvári, GY. (2012). FROST HARDINESS OF PEACH AND APRICOT FLOWER BUDS. Acta Hortic. 962, 291-296
DOI: 10.17660/ActaHortic.2012.962.41
frost tolerance, winter hardiness, endodormancy, ecodormancy, peach, apricot

Acta Horticulturae