Abstract

Abstract Impedance in situ of one-year-old fruiting shoot internodes was evaluated as a means of measuring hardiness, and to determine the effect of temperature and rest on the development of hardiness in dormant buds of blueberries (Vaccinium corymbosum L.). Impedance measured by inserting 2 stainless steel needles through the bark into the phloem and cambium showed the relative hardiness levels of woody tissue at each date. Impedance varied inversely with temperature during hardening and dehardening. Differences in bud hardiness among cultivars at specified dates were not always shown.

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