Glomerella leaf spot causes irregular spots on the leaves and can defoliate an orchard by harvest. Glomerella is showing up in Gala and Golden Delicious orchards in southeastern U.S., but it has the potential to move north if warm summers continue. As the climate warms and new apple varieties are introduced, apple growers might have to deal with apple diseases they’ve not experienced before, warns Dr. Turner Sutton, plant pathologist at North Carolina State University. Growers in the southeastern United States have been seeing more diseases in their orchards during the past 10 to 15 years, Sutton reported at the […]