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

Fanleaf/yellow mosaic (169); yellow mosaic (170).

PHOTO 169. Irregularly distributed yellow spots in conjunction with leaf deformation may be indicative that fanleaf combined with yellow mosaic occurs in these Sémillon leaves.

PHOTO 170. Typical of yellow mosaic is the overall (or practically overall) yellowing of leaves.

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