Thompson Seedless

Exploratory studies indicate that 64 mature Valencia oranges per sample, when picked in a consistent manner with 16 fruits from each of 4 randomized normal trees, suffice to give fair (10%) agreement between replicates such a sample ordinarily weighs from 18 to 24 pounds. Very cursory tests with Thompson seedless grapes demonstrate... 

Spanos, G.A. and Wrolstad, R.E., Influence of processing and storage on the phenolic composition of Thompson seedless grape juice, J. Agric. Food Chem., 38, 1565, 1990. 

Figure 3. Close-up of berries of Thompson Seedless 89 days after being sprayed with KGAS at full bloom on May 29...

In Thompson Seedless, pollination and fertilization occur but the embryo soon aborts. Stout (31) called this condition stenospermy. To determine whether girdling, KGA3, or 4-CPA would induce berry development following emasculation in this variety, clusters were emasculated on May 13. Four clusters... 

Figure 10. Thompson Seedless clusters 69 days after treatment...

Effect of GAl9 GA2, GAs, and GAU on Black Corinth and Thompson Seedless Fruit... 

Clusters of Black Corinth and Thompson Seedless were dipped in solutions of GAi, GA2, GAs, and GA4 at 0. 1, 5, or 10 p.p.m. All clusters of Black Corinth responded to all gibberellins, although the response appeared less to GA2 than to... 

Table III. Response of Thompson Seedless Grapes to KGA3 Sprays...

One Thompson Seedless and one Black Corinth vine, sprayed after flowering in two consecutive years, respectively, showed no visible injury from KGA3 at 1000 and 100 p.p.m. Thus, high concentrations are not toxic to the seedless varieties studied, although far lower concentrations are highly toxic to the seeded varieties studied. A generalization must await tests with more varieties. 

To test whether KGA3 moved from one part of a cluster to another, the apical or basal portions of young Thompson Seedless and Black Corinth clusters were treated (44). Only sprayed berries enlarged, indicating little or no translocation of KGA3 from one berry to another (Figure 12). When KGA3 was applied to... 

Figure 12. Thompson Seedless cluster 79 days after basal portion treated with KGAZ at 100 p.p.m.

Figure 14. Thompson Seedless grapes 76 days after being sprayed on June 11 with KGAS...

Qrapes Thompson Seedless treated in Indio Entire cluster 0 3400 4600... 

Thompson Seedless treated at Davis Grapes only 62 32 8... 

Fermentation of the base white wine, used in producing the fortifying brandy, follows standard procedures. In Cognac, nonaromatic varieties, such as Trebbiano and Baco 22A, are used, where in Armagnac, Trebbiano is preferred. These cultivars have little varietal aroma, retain high acidity, and have limited alcohol production potential. In California, French Colombard, Thompson Seedless, and Tokay are the cultivars without distinctive flavor used to produce a brandy base wine. 

Sweet-Wine Grapes Trousseau, Sultana, Palamino (Palomino), Thomson s Seedling (Thompson Seedless), Muscat of Alexandria,... 

Post-Prohibition. The repeal of Prohibition found eastern viticulture, what there was left of it, in deep depression. Unlike California, it was not helped by the huge grape deal directed at home winemakers and it had lost much of the fresh fruit market to Thompson Seedless, Flame Tokay, and Emperor from the Central Valley, short on flavor but long on shipability. 

Figure 4. Change in carotenoid contents during maturation of three varieties of grapes (A) Concord grapes (B) Thompson seedless and (C) Chilean red.

Schwartz, M. and Costell, E. (1986). Influencia de la Temperatura en el Comportamiento Reologico del Azucar de Uva Reologico del Azucar de Uva (cv, Thompson Seedless). Revista de Agroquimica y Tecnologia de Alimentos 3(26), 365-372. 

Muscat Hambourg Muscat Ottonel Italia Wurzer Grenache Merlot Nobling Rul nder Shiraz (Syn. Syrah) Terret Thompson Seedless Ugni Blanc... 

In this investigation we processed pears, apples and Thompson seedless grapes into juice and juice concentrate and tracked the compositional changes through processing and storage. The quality... 

Figures 1, 2, and 3 outline the unit operations for the different processing trials. SO2 addition is commonly used in commercial processing of Thompson seedless grapes into concentrates. We were particularly interested in its influence on composition and quality and did parallel trials with and without addition of 70 ppm S02 ...

Thompson Seedless Grapes) fs02 Addition, 70 ppm J Tno SO2 Addition)... 

Figure 1. Unit operations for processing Thompson Seedless white grape juice samples. (Reproduced from ref. 4. Copyright 1989 American Chemical Society.)...

Figure 9. Effect of processing and storage on the phenolics of Thompson Seedless grape juice. Unit operations code P, pressed juice E, enzyme clarification Ft, filtered B, bottled single-strength juice C, concentrate and CS, stored concentrate.

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