 These contracts agreed to wage rises for pickers, the introduction of a health plan, and new safety measures regarding the use of pesticides on the crop.In July 1970, the Grower-Shipper Association representing lettuce growing companies in California's Salinas Valley renegotiated its contracts with the Teamsters, allowing the latter union to represent their employees.Chavez was angry at this, traveling to Salinas to talk with the lettuce cutters, many of whom were dissatisfied with the way that the Teamsters represented them.