Quality Table Grapes

Produce

Any grapes that pass the taste test are often considered acceptable fruit quality by backyard growers. Commercial growers must use a more complex consumer definition of acceptable fruit quality that involves not only taste but also appearance, including compactness of the cluster, berry color, berry size, and freedom from visible defects such as cracking, rot and spray residue.

Numerous vine practices can influence these aspects of table grape quality (Table 2). Grape growers must decide how important individual fruit quality components are to their fruit production and marketing. For example, if berry size is considered important, the grower should use one or more of the vine cultural practices that influence berry size (Table 2). Grape varieties vary greatly in their response to cultural practices. Some table grape varieties for temperate climates have been extensively evaluated with regard to these practices and information to guide growers is available (Zabadal et al., 1997). Many table grape varieties, however, have never been evaluated for their response to cultural practices such as trunk or cane girdling. The results might be dazzling or disastrous.

The purpose of the information presented below is to guide table grape growers in their selection and use of special cultural practices for table grapes. The prospects are good that some backyard viticulturists will undertake totally new combinations of these cultural practices on varieties that have never been manipulated in this way before. Viticultural frontiers await. Apply treatments first on a small trial basis and expand your successes. The following vine practices are presented from those most to least commonly used.

Table 2. Four aspects of table grape quality and the cultural practices that may influence them.

Aspects of

Cultural practices

table grape

to influence grape

quality

quality

Promote

• Choice of training system

fruit

• Increased pruning severity

maturity

• Shoot positioning

• Crop adjustment

Reduce

• Cluster thinning

cluster

• Gibberellic acid sprays

compactness

• Brushing

Increase

• Increased pruning severity

cluster

• Flower cluster thinning

compactness

• Girdling prior to bloom

• Shoot topping

• Berry thinning

Increase

• Flower cluster thinning

berry size

• Berry thinning

• Girdling at fruit set

• Gibberellic acid sprays

• Brushing

Section IV -

Special Practices to Produce Quality Table Grapes

Berry Boosters

Berry Boosters

Acai, Maqui And Many Other Popular Berries That Will Change Your Life And Health. Berries have been demonstrated to be some of the healthiest foods on the planet. Each month or so it seems fresh research is being brought out and new berries are being exposed and analyzed for their health giving attributes.

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