NPI, 417 Wakara Way, a company developing chemicals for agriculture, has purchased the label, technical data package and existing inventories of gibberellic acid, marketed under the name of Gibrel, from MSD AgVet. Terms of the purchase weren't disclosed.

Dave Martin, NPI executive vice president, said that during 1991, NPI will sell the existing inventories of Gibrel and begin formulating products for the 1992 selling season to grape and citrus growers.