Search Results

You are looking at 1 - 2 of 2 items for

  • Author or Editor: J. Wiebe x
Clear All Modify Search

Abstract

Five grape cultivars (Vitis spp.) varying in vine vigor were planted at 4 spacings (1.8 m × 1.8 m, 1.8 m × 2.7 m, 2.7 m × 1.8 m, 2.7 m × 2.7 m) on a Trafalgar silty clay loam soil in Ontario. In each of the first 5 harvest years (years 3 through 7 following planting), lowest yields per vine were obtained from the closest spacing (1.8 m × 1.8 m) but the increased plant number at this spacing resulted in highest yields/ha. Fruit quality, as evidenced by soluble solids and titratable acidity, was not adversely affected by close spacing. There was a greater reduction in fruit yields per vine and vegetative growth at the closer within-row spacing than at the closer between-row spacing; this effect of within-row competition was especially pronounced for the vigorous cultivars. Results obtained in this study indicate that increasing the planting density (by reducing the between-row distance) of grapevines on clay loam soils in Ontario may lead to economical increases in production.

Open Access

Abstract

Cluster-thinning of the French hybrid grape cultivar ‘de Chaunac’ (Vitis sp.) resulted in superior fruit quality and an increase in vigor of the vines in comparison to the unthinned vines in a similar pruning and management regime. The higher sugar levels associated with thinning are consistently desirable for wine making under Ontario conditions. The favorable test site used limited the expression of vine decline and winter injury usually associated with over-cropping of this cultivar in the Niagara Peninsula of Ontario.

Open Access