 This wine can also be made in a sparkling "Spumante" style.Grapes are limited to yields of 10 tonnes/ha with a minimum alcohol level of 11%.Over the years Ortrugo has been known under a variety of synonyms including Altrughe, Altrugo, Altrugo de Rovescala, Altrugo de Rovalesca, Artrugo, Barbasina, Barbesina, Barbesino, Barbesino bianco, Barbsin agglomerato, Barbsin bianco, Ortrugo de Rovescala, Trebbiano di Tortona, Vernasino bianco and Vernesina.