Gibberellins, like auxin, can cause the development of parthenocarpic fruits, including apples, currants, cucumbers, and eggplants. In some fruits, such as mandarin oranges, almonds, and peaches, the gibberellins have been effective, where auxin has not, in the promotion of fruit development. The major commercial application of gibberellins, however, is in the production of table grapes. In the United States, large amounts of gibberellic acid (GA3) are applied annually to the Thompson Seedless grapes, a cultivar of Vitis vinifera. Treatment causes larger fruit and much looser clusters, making them more attractive to the consumer (Figure 27–21).