North American Fruit Explorers mailing list at ibiblio

["Rodney Eveland" <reveland@collinscom.net>]

http://www.crfg.org/tidbits/gibberellic.html

excerpt:  Item 3 in the above URL

Effects of Gibberellic Acid

Increased fruit set. When there is difficulty with fruit set because
of incomplete pollination, GA may be effectively used to increase
fruit set. The resulting fruit may be partially or entirely seedless.

Item 4 from the url....

Hybridizing. Pollination within self-incompatible clones and between
closely related species may some times be forced by the application of
GA and cytokinin to the blooms at the time of hand pollination.

I understand that many seedless grapes are sprayed with gibberellic
acid to get a profitable crop.