I think that might be grape-vine blister mite. They do not cause major issues to the growth. To try and break the cycle, you could try to clear out fallen leaves in autumn and winter time and lay a new thick mulch over the winter.
I think that might be grape-vine blister mite. They do not cause major issues to the growth. To try and break the cycle, you could try to clear out fallen leaves in autumn and winter time and lay a new thick mulch over the winter.
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