The article considers and studies the need to find develop new sources of protein, as well biologically active substances, methods their production processing, used both for obtaining livestock products in other areas human economic activity. One most promising is snail farming, represented by edible species land snails. This covers development a method type raw material from Helix pomatia (gra...

The volatile compounds of wines made from three grape varieties (Monastrell, Cabernet Sauvignon and Syrah) using three pre-fermentation techniques (grape freezing, dry-ice and cold maceration) and a control treatment were measured. The different winemaking practices, which are intended to increase the aromatic properties of wines, produced results that depended on the variety concerned. For exa...

In order to elucidate the aroma components of wine produced in the Loess Plateau region of China, volatile compounds of young wines from Cabernet Sauvignon, Cabernet Gernischet and Chardonnay varieties grown in the new ecological region were investigated for the first time in this research. Among the volatile compounds analyzed by HS-SPME with GC-MS, a total of 45, 44 and 42 volatile compounds ...

In 2002, the maturity of grapevine was researched on the basis of sugar content, total titratable acidity and pH at seven locations with an undulating topography in four varieties 'Chardonnay', 'Riesling', 'Welschriesling' and 'Sauvignon'. All sampling points were geo-referenced simultaneously with DGPS for creating sugar maps. The significant relationship between the varying altitude above sea...

Many woody crop plants such as grapevine are traditionally grown with scion varieties grafted onto rootstocks. The selection of an appropriate rootstock provides a powerful tool to manage the growth and fruiting of the scion (Jones, 2012). In the grapevine propagation, the use of rootstocks is not a new matter. The evidence of the use of rootstocks can be found out even in works written by the ...

Jellies of seven grapevine varieties were physico-chemical and sensorial characterized for the first time. Jellies differed significantly in moisture and ash contents, colour, pH, acidity and antioxidant activities. ‘Tinta Carvalha’ was the darkest and redness jelly, showing the highest antioxidant activity. Regarding sensory characteristics, no significant differences in the appearance, taste,...

Grapevine trunk diseases constitute one of the major problems for viticulture worldwide, with Botryosphaeria dieback considered as most important these diseases. In this work, we aimed to (i) evaluate effect combination two products, Esquive® (a Trichoderma-based product) and LC2017 low-copper-based product), in control Lasiodiplodia theobromae, by evaluating internal lesion length caused inocu...

black meristematic fungi are cosmopolitan and able to adapt to extreme fluctuations of ultraviolet radiation, temperature, and moisture and grow in exposed habitats such as stone surfaces. in a survey on fungi associated with fruit rots, leaf spots, canker, gummosis, dieback and trunk diseases of grapevine and walnut trees in kurdistan province (iran), some black meristematic fungal isolates re...

Optimal control in a multistage physiologically structured insect population model. Abstract: We present an age-and stage-structured population model to study some methods of control of one of the most important grapevine pests, the European grapevine moth. We consider control by insecticides that reduce either the proportion of surviving eggs, larvae or both, as well as chemicals that cause ma...

S. Afr. J. Enol. Vitic., Vol. 32, No. 1, 2011 *Corresponding author: [email protected] [Tel: +27 (0)11 5592558; Fax: +27 (0)11 5592819] Acknowledgements: The authors thank Winetech (Project No. WW08/28), for research funding, Dr O. Augustyn (ARC-Nietvoorbij, Stellenbosch), for sourcing and collecting wine samples, and Prof C.S. Whitehead and M. Fourie (Department of Botany and Plant Biotechnol...