Downy Mildew

Jim Olis* and Brian Hudelson, UW-Madison Plant Pathology *Completed as partial fulfillment of the requirements for a BS in Plant Pathology at the University of Wisconsin Madison. Revised:  8/6/2012 Item number:  XHT1077 What is downy mildew? The downy mildews are a group of fungal diseases that cause destruction of the leaves, stems, flowers and fruits […]

Guignardia Leaf Spot

Brian Hudelson, UW-Madison Plant Pathology, UW-Extension Revised:  4/28/2012 Item number:  XHT1123 What is Guignardia leaf spot?  Guignardia leaf spot is a common fungal leaf spot that affects vining plants such as Boston ivy and Virginia-creeper.  The pathogen that causes Guignardia leaf spot also causes a leaf spot and fruit rot of grape called black rot. […]

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