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

Leafroll.

PHOTO 206. A typical example of a dieback vineyard – a situation where many grapevines have died while the remainder await uprooting – as eventually caused by leafroll.

PHOTO 207. Anatomical changes/reactions induced by leafroll in the petioles. Note the slightly wavy cambium and especially phloem degeneration (obliteration, deforming and necrosis of sieve-cells – pictured left at 11:00).

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