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

PART 11

VARIA 11

I n the preceding sections of this guide (Part 1 to Part 10) the spotlight fell on grapevine abnormalities based on causes which could be divided into specific categories, namely: (i) plant material problems; (ii) fungal diseases; (iii) bacterial diseases; (iv) virus and virus-like diseases; (v) grapevine pests; (vi) abiotic abnormalities; (vii) genetic deviations; (viii) deficiencies and toxicity of nutritional elements; (ix) herbicide phytotoxicity and (x) injudicious/faulty cultivation practices/ actions. Apart from harmful interventions as are effected by abovementioned proven and visually recognizable phenomena in vines and the products thereof, the occurrence of an extensive and varied spectrum of non-harmful examples in this regard is well-known in the cultivation areas of South Africa. Nevertheless the continuous and scrupulous monitoring of vineyard blocks is strongly advised, to ensure that one keeps abreast of any occurrence of such situations, including any advantages or disadvantages which may be attached to them – even if it only based on interesting observations. In conclusion the details regarding the occurrence of typical examples thereof are visually illustrated in an additional category (Part 11 – Varia) with short explanatory captions.

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