grapevine galls

Discussion in 'HortForum' started by Steve Anderson, Jun 27, 2009.

  1. Steve Anderson

    Steve Anderson Member

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    Hi everyone -- My concord grapevines have been producing for many years, and still appear vigorous and healthy. However, this summer I have noticed a great many small galls on both leaves and new shoots. Cutting one open I found a tiny yellow worm, not unlike what one finds on a goldenrod galls. Are these dangerous and if so, how can I control or eliminate them?
     

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