At least once a week, Ethan Wirth grabs his pest management book and traverses the 5-acre vineyard at DC Estate Winery in South Beloit. As he looks at the grapes, he’ll sometimes reference the book, which lists common insect and fungal issues. “Scouting,” as the 33-year-old operations manager called it, is an important step in creating high-quality wine. It also might be the primary way grape ...