Considering how popular grapes are in terms of their antioxidant benefits, we compared concord, purple, red, and green grapes for total antioxidant capacity (TAC) and carbohydrate concentration. All grapes were acquired from commercial sources and samples of each were separated into skinned and not skinned groups. Each whole grape and the skins were individually homogenized and then separated i...

• Container Fumigation of Table Grapes • Ozone and Table Grapes / Stone Fruit • Ozone and Citrus • SO2 Low Emission Rates to Control Botrytis • CO2 Effects on ‘Thompson Seedless’ Table Grapes • CO2 Effects on ‘Redglobe’ Table Grapes • Pomegranate Postharvest Fungicide Update • Postharvest Abstracts • Future Events COOPERATIVE EXTENSION University of California Kearney Agricultural Center 9240 S...

Grapes are one of the important fruit crop in the world, with production rates of approx. 50 million tons per year (Schieber et al., 2001). Grapes can be decay during pre harvest and post harvest and post harvest decay of grapes can be due to physical, physiological, or pathological factors. Rachis dehydration is a main decay factor (physical deterioration) of grapes during the pre or postharve...

Two modern laser-based techniques were synchronously applied to study the dynamics of the trans-resveratrol activity in Botrytis cinerea-infected grapes. Direct analysis of trans-resveratrol in both infected and noninfected grapes (Vitis vinifera, Aledo variety) was performed by using an analytical technique incorporating laser desorption coupled with laser resonant ionization and time-of-fligh...

Different soil types can significantly affect the composition of wine grapes and the final wine product. In this study, the effects of soil types on the composition of Cabernet Sauvignon grapes and wine produced in the Helan Mountains were evaluated. Three different representative soil types--aeolian, sierozem and irrigation silting soil were studied. The compositions of grapes and wines were m...

AIMS To identify ascomycetous yeasts recovered from sound and damaged grapes by the presence of honeydew or sour rot. METHODS AND RESULTS In sound grapes, the mean yeast counts ranged from 3.20 +/- 1.04 log CFU g(-1) to 5.87 +/- 0.64 log CFU g(-1). In honeydew grapes, the mean counts ranged from 3.88 +/- 0.80 log CFU g(-1) to 6.64 +/- 0.77 log CFU g(-1). In sour rot grapes counts varied betwe...

Tempranillo grapes were immersed in solutions of pyrimethanil, metalaxyl, dichlofluanid and penconazol fungicides at different concentrations for several different times. Determinations of the fungicide residues was carried out by GC-NPD, with an additional confirmation by GC-MS. The percentage absorption was determined as well as the distribution between surface, skin and pulp of the grapes. T...

What soils are best for grapes? The best grape soils are deep, well-drained loams, free from high concentrations of alkali, boron, or other toxic materials. Deeper soils produce the heaviest crops and are preferred for raisins, common wine grapes, and some varieties of table grapes. However, grapes are adapted to a wide variety of soil types and can be grown successfully on soils not suitable f...

In order to analyze and compare the phenolic characteristics of red wine grapes with diverse genetic backgrounds, skin phenolics among 21 different cultivars belonging to Vitis vinifera L., East Asian and North American Vitis species and hybrids, as well as 2 varieties of muscadine grapes were estimated by HPLC-MS/MS. There were 45 anthocyanins, 28 flavonols, 8 flavan-3-ols, 9 cinnamic acids, 5...

Deciding when to harvest the grapes is one of the most important choices that a winemaker or vineyard manager has to make. Sugar level in the grapes is often used as a maturity index, but sugar level at maturity is variable depending on the climate of the region where the grapes are grown and, therefore, is an inadequate indicator by itself. Others use the sugar to acid ratio or the color of th...