Webinar will Share Status of a Smartphone App to Help Growers Count Grape Clusters March 09, 2021 SEATTLE (March 5, 2021) – Automating the labor-intensive task of crop estimation has long been a research goal of the wine grape industry. Washington State University researchers are leading an effort to develop a cutting edge smartphone app to address the issue, and the industry is invited to a one-hour webinar on April 8 to hear all about it. Each summer, wine grape growers and wineries spend thousands of hours counting and weighing grape berries and clusters to estimate crop yields. It’s a vital step to guide vineyard management decisions, but it doesn’t provide real-time data. Because the estimate represents only one point in time, weather events occurring after data collection can skew the numbers.