 The grape boycott and strike were victorious, and grape growers, for the first time in U.S. history, signed industry-wide contracts with Mr. Chavez and the UFW. With these first contracts, the UFW temporarily ended the exploitation of farmworkers and their children in the grape fields and banned the use of such deadly pesticides as DDT. In 1973, however, the farmworkers were forced once again to strike and boycott.