Control of eutypa in vineyards

Project Number
WW 06-19

Project title
Control of eutypa in vineyards

Project leader
Halleen, F

Team members
Groenewald, M

Project description
Eutypa dieback, caused by the fungus Eutypa lata, is a serious disease in South African vineyards. No fungicide is registered for control of this disease in local vineyards. Studies were therefore undertaken to investigate the effectiveness of fungicides, biological control agents and combinations of fungicides and biological control agents against this pathogen.

Benomyl proved to be an effective fungicide according to the in vitro results. It is still the only fungicide registered for pruning wound protection against Eutypa dieback in America and is therefore recommended for further use in South Africa. Field trials, however, will further test the efficacy of this fungicide when exposed to a wider range of naturally occurring Eutypa ascospores which might vary more in their sensitivity towards fungicides. Tebuconazole, flusilazole, fenarimol and myclobutanil also proved to be effective and might be used as effective alternatives to benomyl, especially in the light of possible resistance towards benomyl. A Trichoderma isolate, isolate T77, was selected according to results obtained from in vitro and in vivo studies of 306 Trichoderma isolates and formulated to be tested in field trials. An antagonistic soil isolate, Tr1, which was insensitive to lower concentrations of the fungicides myclobutanil and fenarimol will be tested as a biological/chemical treatment in the field trials.

These results therefore indicate the possible use of various fungicides, biological, as well as biological/chemical applications for grapevine pruning wound protection against Eutypa dieback.

Poster(s)
Halleen, F. 2000. In vitro sensitivity of Eutypa lata to various fungicides. Poster presented at the 2nd International Congress of the South African Society for Enology and Viticulture. 8-10 November, Cape Town, South Africa.

Halleen, F, Volkmann, A S and Fourie, P H. 2000. Incidence of Eutypa-like symptoms in Cabernet Sauvignon vineyards in the greater Stellenbosch area. Poster presented at the 2nd International Congress of the South African Society for Enology and Viticulture. 8-10 November, Cape Town, South Africa.

Presentation(s)
Halleen, F, Fourie, P H and Calitz, F. 2000. In vitro sensitivity of Eutypa lata to various fungicides. 2nd International Congress of the South African Society for Enology and Viticulture, 8-10 November, Cape Town.

Volkmann, A S, Halleen, F and Fourie, P H. 2000. Incidence of Eutypa-like symptoms in Cabernet Sauvignon vineyards in the greater Stellenbosch area. Paper presented at the 2nd International Congress for Enology and Viticulture. 8-10 November, Cape Town, South Africa.

Fourie, P H, Halleen, F and Volkmann, A S. 2000. Fungi associated with grapevine wood, root and trunk diseases: A summary of the 1999-2000 results from the diagnostic services at Nietvoorbij. Paper presented at the 2nd International Congress for Enology and Viticulture. 8-10 November, Cape Town, South Africa.

Halleen F. 2001. Tandpyn (Euypa terugsterwing): ‘n oorsig. Presentation at the ARC Infruitec-Nietvoorbij Disease and Pest Information Day, 16 August, Grabouw, South Africa.

Fourie, P and Halleen, F. 2001. Stam- en wortelsiektes van wingerd. VinPro Information Day, 6 June, Robertson.

Fourie, P and Halleen, F. 2001. Stam- en wortelsiektes van wingerd. VinPro Information Day, 6 August, Grabouw.

Fourie, P and Halleen, F. 2001. Stam- en wortelsiektes van wingerd. VinPro Information Day, 28 August, Barrydale.

Fourie, P and Halleen, F. 2001. Stam- en wortelsiektes van wingerd. VinPro Information Day, 29 August, Worcester.

Fourie, P and Halleen, F. 2001. Stam- en wortelsiektes van wingerd. VinPro Information Day, 4 September, Vredendal.

Fourie, P and Halleen, F. 2001. Stam- en wortelsiektes van wingerd. VinPro Information Day, 5 September, Stellenbosch.

Fourie, P and Halleen, F. 2002. Diagnostiese dienste – resultate ten opsigte van stamsiektes. Presentation at the South African Society for Enology and Viticulture: Vineyard Forum: Winter Meeting. 7 June, Stellenbosch, South Africa.

Fourie, P and Halleen, F. 2002. Stam- en wortelsiektes van wingerd. ARC Infruitec-Nietvoorbij Siekte- en Plaag Bestuur Inligtingsdag, 23 July, Malmesbury.

Fourie, P and Halleen, F. 2002. Tandpyn by wingerd. ARC Infruitec-Nietvoorbij Siekte- en Plaag Bestuur Inligtingsdag, 23 Julie, Malmesbury.

Halleen, F. 2002. Tandpyn in wingerd beheer en jongste navorsingsresultate. VinPro Information Day. 13 August, Stellenbosch.

Safodien, S, Halleen, F, Crous, P W, Smit, A and Smit, L. 2002. The status of Eutypa on grapevines in South Africa. Paper presented at the 26th National Congress of the South African Society for Enology and Viticulture. 14-15 November, Somerset West, South Africa.

Safodien, S, Halleen, F, Crous, P W, Arendse, M, Botha, A and Smit, W A. 2003. Development of a PCR-based assay for the identification of Eutypa lata from grapevines. Paper presented at the 42nd Congress of the Southern African Society for Plant Pathology. 19-21 January, Winterton, South Africa.

Safodien, S, Halleen, F, Crous, P W , Smit, L, Botha, A and Smit, W A. 2003. The characterisation of Eutypa isolates associated with Eutypa dieback of grapevine in South Africa. Paper presented at the 41st Congress of the Southern African Society for Plant Pathology. 19-22 January, Bloemfontein, South Africa.

Safodien, S, Halleen, F, Crous, P W, Smit, L, Botha, A and Smit, W A. 2003. The characterisation of Eutypa isolates associated with Eutypa dieback of grapevines in South Africa. Paper presented at the 3rd International Workshop on Grapevine Trunk Disease. 1-2 February, Christchurch, New Zealand.

Halleen F. 2003. Voorkoms, simptome en beheer van die wingerdsiektes witroes, tandpyn, streepvlek, swartvoet en black goo. Modular Course in Table Grape Cultivation. Elsenburg Agricultural College and ARC Infruitec-Nietvoorbij, 14 May, Stellenbosch.

Halleen, F and Fourie, P H. 2003. Trunk disease in South Africa. Presentation at the Coonawarra Grapegrowers’ Association, Seminar on Grapevine Disease. 5 February, Coonawarra, Australia.

Halleen, F. 2003. Diseases associated with pruning. Presentation VinPro Information Day. 23 July, Malmesbury.

Halleen, F and Fourie, P H. 2005. Fungi associated with pruning wound infections and control thereof. Paper presented at the 27th National Congress of the South African Society for Enology and Viticulture. 5-7 November, Somerset West, South Africa.

Article
Halleen, F, Volkman, A, Fourie, P H. 2001. Incidence of Eutypa-like symptoms in Cabernet Sauvignon vineyards in the greater Stellenbosch area, WineLand, Mnth Jun (p. 111-112)

Halleen, F, Fourie, P H, Calitz, F J. 2001. In vitro sensitivity of Eutypa lata to various fungicides, WineLand, (p. 113-115)

Van Niekerk, J M, Fourie, P H, Halleen, F. 2003. Ekonomiese impak van Eutypa terugsterwing (tandpyn) WineLand, Mnth Dec (p. 78-80)

Halleen, F, Fourie, P H, Lombard, P J. 2010. Protection of grapevine pruning wounds against Eutypa lata by biological and chemical methods, South African Journal of Enology and Viticulture, v. 31 (2) (p. 125-132)
Article.pdf

FinalReport.pdf

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