Natural spread, importance and distribution of yellows, stem pitting and enation disease of grapevine in some viticultural areas of Greece

During an extensive field survey of virus and virus-like diseases of Grapevine in vineyards of Central and Northern Greece, and in Crete island, data were collected on the natural spread, importance and distribution of the diseases described in this paper. The «yellows» disease of Grapevine, exhibit...

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Bibliographic Details
Published in:Phytopathologia mediterranea 1985-08, Vol.24 (1-2), p.73-78
Main Authors: Rumbos, I.C, Avgelis, A.D. (Plant Protection Inst., Heraklion (Greece))
Format: Article
Language:English
Subjects:
Disease etiology
GRAPEVINES
GRECE
GRECIA
GREECE
Infectious diseases
Pitting
Plant diseases
PLANT VIRUSES
Plants
Rootstocks
Symptoms
VID
VIGNE
Vineyards
Viral diseases
VIROLOGIA
VIROLOGIE
VIROLOGY
VIRUS DE LAS PLANTAS
VIRUS DES VEGETAUX
Viruses
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Summary:During an extensive field survey of virus and virus-like diseases of Grapevine in vineyards of Central and Northern Greece, and in Crete island, data were collected on the natural spread, importance and distribution of the diseases described in this paper. The «yellows» disease of Grapevine, exhibiting symptoms similar to those attributed to flavescence dorée and black wood, has a limited distribution and little economic importance. It occured in a few vineyards infecting a low percentage of plants (0,1-1%), although in some cases incidence was of 10-20%. The natural spread of the disease and the inconsistency of symptom expression were observed over a 7 year study in an infected vineyard. The most susceptible cultivars were Razaki and Roditis. The stem pitting disease is considered an important factor associated with serious yield losses and reduced longevity observed in numerous vineyards. Besides 'Razaki' and 'Sultana', which were found to be the most sensitive cultivars, severe symptoms were also observed in the cv. Muscat de Hamburg, Savatiano, Roditis, and Xynomavro Naoussis, and on the rootstocks 110 R, 99 R, Kober 5 BB, and 420 A. Enation seems to be restricted to Crete, where 'Razaki' was most seriously affected. The inconsistency of the symptomatology of the disease was studied during the period 1978-83 in the same vineyard where the disease incidence fluctuated between 1,5 and 5%. Durante una estesa serie di rilievi in campo sulle virosi e malattie virus-simili della Vite, nelle zone viticole della Grecia centrale e settentrionale e nell'isola di Creta, sono stati acquisiti dati sulla diffusione naturale, importanza e distribuzione dei «giallumi», del legno riccio e delle enazioni. I «giallumi», che si manifestano con una sintomatologia simile a quella attribuibile alia flavescenza dorata e al legno nero, hanno una limitata distribuzione e modesta importanza economica. Sono stati riscontrati in vari vigneti con bassa incidenza (0,1-1%), benché in certi casi la diffusione sia apparsa rilevante (10-20%). La diffusione naturale e l'incostante apparizione della malattia sono state accertate con uno studio settennale in un vigneto infetto. Razaki e Roditis sono le cultivar più sensibili. Molto diffuso è risultato il legno riccio riscontrato in numerosi vigneti, e causa di seri danni e ridotta longevità dei ceppi. Oltre 'Razaki' e 'Sultana', che sono le varietà più sensibili, gravi sintomi sono stati osservati su 'Moscato di Amburgo', 'Savatiano', 'Ro
ISSN:0031-9465
1593-2095