Dr. Peter explores the fuzzy fungi that cause powdery mildew and a slew of summer rots including black rot and bitter rot. Then shifting our focus from fungal diseases to bacterial, she explains how to curb the spread of a tumour-like growth known as crown gall and infamous fire blight infections. Dr. Kari Peter is an Associate Research Professor of Tree Fruit Pathology who loves to help with a burning question about tree fruit diseases! She is located at the Penn State Fruit Research and Extension Center in Biglerville, Pennsylvania.