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

Fanleaf.

PHOTO 165. Virus particles associated with fanleaf. Also known as nepoviruses where “ne” refers to nematodes (being soil-borne vectors) and “po” to polyhedral (shape of the particles).

PHOTO 166. Typical of fanleaf is leaf deformation associated with wider petiole sinuses, asymmetrical leaf blades and main veins being drawn together.

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