downy mildew
acref-9780198705383-e-1057-audio-1057.mp4
acref-9780198705383-e-1057-audio-1057.mp4
acref-9780198705383-e-1057-audio-1057.mp4
acref-9780198705383-e-1057-audio-1057.mp4
downy mildew, one of the most economically significant diseases affecting vines, often called peronospora in parts of Europe, and mildiou…