The First Ladies of Virginia yesterday starred at the most successful fund-raiser of Supervisor Audrey Moore's race for chairman of the Fairfax County Board.

State Attorney General Mary Sue Terry; Jeannie Baliles, wife of Gov. Gerald L. Baliles, and Lynda Robb, wife of former governor Charles S. Robb, attracted 60 people to a filet mignon luncheon that poured $20,000 into Moore's campaign.

As they rallied behind Annandale District Democrat Moore in the final days of her race against Republican Chairman John F. Herrity, the Democratic First Ladies seemed like veteran athletes giving a pep talk to the rookie.

Baliles warned Moore not to "give up until the last minute" in her race, one of the state's "most publicized, most intense and most contentious." She told Moore: "Work a little harder, a little longer. Elections are not won by the fainthearted."

The $250-a-plate luncheon at the Tysons Sheraton, the only Moore fund-raiser that has cost more than $35 to attend, boosted Moore's hopes of affording the television advertising that she has promised but not aired.

Moore has raised $270,000. Herrity has about $400,000.

Last month, a Herrity breakfast featuring Sen. Robert J. Dole (R-Kan.), a presidential candidate, drew $70,000 and was believed to be the largest county fund-raiser ever. Herrity has had an extensive radio and television campaign in the past month.

"There is something about two weeks before the election when candidates begin to levitate" as they sense victory, said Terry, the first woman elected to statewide office in Virginia. She added that Moore is feeling that lift.

Moore said she knows that she has her work cut out for her, especially if she wins the Nov. 3 election. "We need to face up to {traffic and development problems} and get them straightened out . . . . We need to keep the prosperity going {and} get the traffic moving."

Robb, who grew up in the White House as a daughter of Lyndon B. Johnson, said she was campaigning for Moore because "I always supported Democrats. Audrey has a lot of energy. I'm glad we have women willing to put themselves on the line and run for office."

Sheila Coates, president of the Black Women United for Action, also attended the luncheon and said there were more women behind Moore than those in office or the governor's mansion. "We are becoming an elitist county," Coates said. "And Audrey Moore is more sensitive to the needs of the total community." Coates said Moore's work for affirmative action, more human services and affordable housing has won her the backing of minorities.

Fairfax Democratic Party Chairman Harris Miller, who introduced himself as "the only man at the head table," told the crowd of men and women that Moore's biggest problem was not Herrity: "Our biggest concern right now is complacency," he said, urging guests to put bumper stickers on their cars and to tell friends to vote.