Labor rights activist Dolores Huerta revealed she was among women and girls who say they were sexually abused by César Chavez, the long-admired Latino icon, while he led the United Farm Workers union. Huerta says in a statement released Wednesday that she stayed silent for 60 years out of concern that her words would hurt the farmworker movement. The stunning allegations against Chavez, who died more than three decades ago, drew immediate calls to change events and memorials honoring the man who in the 1960s brought to light the struggles of field workers.