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  • Author or Editor: D. E. Crowe x
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Abstract

3-indolebutyric acid (IBA) applied to the midvein of lowbush blueberry leaves stimulated lateral shoot development in what is normally an unbranched stem. IBA was effective when applied as a 2% mixture in either lanolin or water. The site of application and habit of shoot growth were shown to influence the treatment response.

Open Access

Abstract

A 4-year study was conducted to compare vine growth and yield in ambient air with growth in air charcoal-filtered to remove ozone. Open top chambers, with and without charcoal filters, were placed over individual vines in a mature ‘Concord’ (Vitis labruscana, Bailey) vineyard. Vines growing in open top chambers, regardless of charcoal filtration, grew less, had delayed maturity of shoots, and delayed leaf senescence as compared to those not growing in chambers. Though chamber effect masked treatment effect on total vine productivity, charcoal filtration reduced oxidant stipple and increased fruit soluble solids. Year-to-year variability in severity of oxidant stipple may be related to seasonal rainfall and ambient ozone levels.

Open Access