Commercial use of growth regulators

Date or time period: 1960s

From the 1960s, 4-CPA (auxin) was used to increase fruitset and berry size of Zante (Corinth) Currant in California, CCC (clormequat) to increase fruitset of winegrape varieties and gibberellin (GA3) to improve berry size and loosen bunches of Sultana and other seedless varieties