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| Titel: |
Identification of Eutypa lata, a Grapevine Parasite |
| Auteur: |
Goran Delibašić Srđan Aćimović Sanja Gajić |
| Verschenen in: |
Pesticidi i Fitomedicina |
| Paginering: | Jaargang 21 (2006) nr. 3 pagina's 193-203 |
| Jaar: |
2006 |
| Inhoud: |
The phytopathogenic fungus Eutypa lata (Pers.: Fr.) Tul. and C. Tul., the causing agent of eutypa dieback, has been increasingly often identified in recent times as a cause of grapevine disease. It was first discovered and identified in Australian vineyards (Carter,1973), where it represented one of the most dangerous fungus pathogens of this plant. A few years later it was discovered in European vineyards as well. This polyfagous fungus,known originally as E. armeniaca (Honsf. & Carter), was first discovered on apricot, on which it caused the “gummosis disease”.In Serbia, Eutypa lata has not been determined officially. However, bearing in mind the form of its spreading (anemochory), as well as the fact that our country is a major producer of grape and fruit, we need to pay special attention to this dangerous pathogen since thereare indications that it is already present in our vineyards.During the period between 2003 and 2005, an inspection of a great number of vineyards in the areas of Vršac, Fruška Gora and Kruševac, was conducted. Many of them had grapevines with typical eutypa dieback symptoms. The aim of the inspection was to find grapevines with this disease, to mark them and take samples for laboratory analysis. Marking suspicious grapevines enabled us to monitor the volume of symptoms, as well as other changes on grapevines. Different colours were used for markings, according to the principle “same colour – same year” The procedure revealed that the average periodbetween early and mild disease symptoms and extreme changes, including withering of entire vines, was 2 to 3 years.The signs of eutypa dieback on diseased grapevines are manifested: on leaves in the form of chlorosis, twisting, necrosis of the edges, drying out and falling off; on shoots,where the shortening of internodia is noticable, as well as colour change and “zig-zag” distribution of internodes; on blossoms and clusters, where absence of flowering, partial bareness and irregular berry size are observed; and on trunks, where necrosis appears on the cross section in a typical “V” form.These studies also established that there is not a single grapevine plant with symptoms indicating eutypa dieback or a similar disease that is older than 8-10 years.The research results, based on examination and monitoring of disease development in the studied vineyards in previous years, indicate that the fungus Eutypa lata, the inducer of grapevine eutyposis, is most probably present in Serbia, and that our viticulture is facingyet another serious threat.In most European and other viticultural centers, highly specialized research teams are being organised to deal with the phenomenon of eutypa dieback, and its inducer Eutypa lata, which is more and more frequently classified as a top priority disease of wooden tissue,especially considering that the economic losses are very significant and occur in all vineyards,regardless of their location. Therefore, in order to prevent infection and fight the disease successfully, we need to take immediate measures of integral protection of grapevinewithout any delay. |
| Uitgever: |
Institute of Pesticides and Environmental Protection (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 4 van 6 gevonden artikelen
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