A Guide to Grapevine Abnormalities in South Africa - P.G. GOUSSARD

Glyphosate phytotoxicity.

PHOTO 498. Shrunken, cup-shaped leaves and shortened/thickened internodes are considered characteristic of glyphosate toxicity.

PHOTO 499. In this example, irregular indentations, evaginations and enlarged leaf sinuses, with the leaf blades sometimes displaying a ridged appearance, are thought to be associated with glyphosate uptakes in affected grapevines.

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