Disaster loomed in Burgundy's 1993 vintage. To save their grape crops, growers had to spray twice as much fungicide as in a normal year. Marcelle ("Lalou") Bize-Leroy would have none of that. As a result of her unusual business model, the Leroy cellars in Auxey-Duresses may house the greatest collection of mature Burgundy anywhere. Wine Spectator's Bruce Sanderson explains.