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What has caused the bumps on the leaves of my grape vine?

Our Advice:

The bumps are caused by Erinose mites feeding underneath the leaves. If only a few leaves are affected, just remove them. If the damage is widespread, apply sprays of SB Plant Invigourator or Organic 2 in 1 from Vitax in spring and again in late-summer when the mites are migrating and easier to control.

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