Abstract
Abstract The seasonal vegetative growth sequences of the highbush blueberry (Vaccinium corymbosum Ait.) and certain features, including apical abortion, are described during growth under usual conditions and under the influence of succinic acid-2,2-dimethylhydrazide (daminozide) sprays. Apical abortion, followed by chlorosis and necrosis of the distal portion of the shoot is a natural phenomenon in highbugh blueberry and results in episodic, sympodial extension growth. Daminozide sprays did not substantially alter the abortion pattern, though shoot growth was substantially reduced the first year of spray application. Shoot growth was not significantly reduced in bushes sprayed but not pruned for 2 years.
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