I have vines that are over ten years old which have recently developed blisters all over them not unlike insect galls, but everywhere. Many of the immature grapes have disappeared. What is infecting my vines & what can I do to get rid of it? I have attached a picture. Thank you, Grape Novice
Your photo is a bit out of focus, but this looks like Erenium Mite galls to me. Have a look at this: http://www.omafra.gov.on.ca/english/crops/hort/news/hortmatt/2004/12hrt04a1.htm The fruit dropping would be unrelated. Ralph
