grapevine disease - concord grapes - Ask Extension
Hello! Looking for help. Attache are images. please review and advise.
Have never seen anything like this, on my vines which have been growing for ...
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grapevine disease - concord grapes #252453
Asked June 08, 2015, 8:27 PM EDT
Hello! Looking for help. Attache are images. please review and advise.
Have never seen anything like this, on my vines which have been growing for 5 years nor has my dad who has been working with grapes for 50+ years.
only thing different that I know of is that we put mulch on ground throughout are grapevine area.
Butler County Pennsylvania
Expert Response
You are seeing injury from the grape tumid gall maker. It was formerly called tomato grapevine galls
The galls are caused by a small midge. It does not require treatment. Prune out and destroy galls to reduce future damage.
The galls are caused by a small midge. It does not require treatment. Prune out and destroy galls to reduce future damage.
Thanks for the info!
The damage is fairly spread out throughout the vines and leaves. Do we cut everything that has damage?
For leaves - do we cut out just the part with damage, or entire leaf?
The damage is fairly spread out throughout the vines and leaves. Do we cut everything that has damage?
For leaves - do we cut out just the part with damage, or entire leaf?
Removing the entire leaf is the most expedient By removing the galls you reduce gall potential for 2016. No yield loss is associated with this midge. You could choose to do nothing, but there is a possibility that you will see more galls in 2016. I would remove leaves in most cases unless it would severely defoliate a vine.
Ok!
Thank you so much for the help and detailed explanation!!!
Thank you so much for the help and detailed explanation!!!
Please feel free to contact us at anytime!
