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

Enation.

PHOTO 252. In addition to a witche’s broom format, seriously stunted growth can be seen in these Sauvignon blanc grapevines (as observed in Photo 251) – which can be associated with the incidence of enation in conjunction with other harmful virus diseases.

PHOTO 253. A typical example of witche’s broom (as in Photos 251 & 252) associated with enation. In this instance enation occurs in conjunction with fanleaf – as reflected by the visual occurrence of characteristic traits of the latter, with the leaf in the 16:00 position. Note that as a result of mechanical harvesting the bunch which has been stripped of its berries can obviously not be associated with enation/fanleaf.

164 • A Guide to Grapevine Abnormalities in South Africa