Search Results

You are looking at 1 - 2 of 2 items for

  • Author or Editor: V. A. Dirks x
Clear All Modify Search

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

Abstract

Field samplings in 3 peach orchards with 4 seedling rootstocks showed that Siberian C seedlings had significantly higher levels of Pratylenchus penetrans [(Cobb) Filip, and Stek.] populations in both root tissues and surrounding soil than 3 other seedling rootstocks tested. Little difference in nematode populations could be shown between seedlings of Veteran, Harrow Blood and Rutgers Red Leaf. Greenhouse studies of infected and nematode-free seedlings of these rootstocks confirmed field results. Significant reduction in growth occurred in all the rootstocks tested, with Siberian C seedlings being the most severely affected. Nematode control and plant breeding implications are discussed.

Open Access