Prevention of grapevine leafroll disease spread between successive vineyards on the same site

Project Number
WW 07-18

Project title
Prevention of grapevine leafroll disease spread between successive vineyards on the same site

Project leader
Pietersen, G

Institution
ARC Plant Protection Research Institute

Project description
A number of sources and means of spread of grapevine leafroll disease have been identified in South Africa through spatio-temporal analyses of spread of grapevine leafroll disease in foundation- and mother-blocks. At one of these sites circumstantial evidence was obtained that leafroll infection of a newly established blocks occurred due to the presence of grapevine leafroll disease infection with attendant viruliferous mealybugs in the preceding vineyard on that site. It is extremely difficult to separate this mode of spread from other primary spread modes at most sites, and the frequency of occurrence of this means of spread is unknown, but may be significant. Unfortunately, as sites suitable for optimal viticulture is limited in South Africa, producers are forced to establish new vineyards at sites where Vitis was planted previously, thereby probably perpetuating the leafroll problem at these sites. In this project we wish to confirm the spread of leafroll between two successive vineyard blocks and perform a field experiment designed to assess control methods such as the use of fallow periods, systemic insecticide use with or without herbicide, and possibly also soil fumigation (depending on availability of a suitable compound and a large enough vineyard block) to prevent the perpetuation of grapevine leafroll infection from a preceding vineyard

Presentation(s)
Pietersen, G. 2006. Tackling the grapevine leafroll disease problem in South Africa. Paper presented at the 44th Congress of the Southern African Society for Plant Pathology. 22-25 January 2006, Hartbeespoort Dam, South Africa.

Pietersen, G, Spreeth, N, Oosthuizen, T W, Van Rensburg, A, Tooth, D and Rossouw, N. 2006. An integrated control strategy to prevent the spread of grapevine leafroll disease at the Vergelegen Wine Estate – a model for the South African wine industry. Paper presented at the 29th National Congress of the South African Society for Enology and Viticulture. 14-17 November, Somerset West, South Africa.

Pietersen, G. 2006. Use of remote sensing to monitor the spread of grapevine disease in South Africa. Paper presented at the 15th International Council for the Study of Virus and Virus-like Diseases of the Grapevine. 3-7 April, Stellenbosch, South Africa.

Saccaggi, D L, Krüger, K and Pietersen, G. 2006. Rapid identification of three mealy bug species by multiplex PCR. Paper presented at the 15th International Council for the Study of Virus and Virus-like Diseases of the Grapevine. 3-7 April. Stellenbosch, South Africa.

Pietersen, G. 2007. Progress report. Presentation at the Winetech Information Day. 2 May, Stellenbosch, South Africa.

Pietersen, G. 2007. Virus epidemiology. Presented at the Winetech Virus Information Day. 4 May, Stellenbosch, South Africa.

Pietersen, G. 2008. Grapevine leafroll disease in South Africa. Presentation to the New Zealand Wine Producers. 6 March, Martinborough, New Zealand

Pietersen, G. 2008. Current studies on leafroll control in South Africa. Presentation to the New Zealand Wine Producers. 6 March, Martinborough, New Zealand.

Pietersen, G. 2008. Grapevine leafroll disease in South Africa. Presentation to the New Zealand Wine Producers. 7 March, Napier, New Zealand.

Pietersen, G. 2008. Current studies on leafroll control in South Africa. Presentation to the New Zealand Wine Producers. 7 March, Napier, New Zealand.

Pietersen, G. 2008. Grapevine leafroll disease in South Africa. Presentation to the New Zealand Wine Producers. 10 March, Gisborne, New Zealand.

Pietersen, G. 2008. Current studies on leafroll control in South Africa. Presentation to the New Zealand Wine Producers. 10 March, Gisborne, New Zealand.

Pietersen, G. 2008. Grapevine leafroll disease in South Africa. Presentation to the New Zealand Wine Producers. 12 March, Marlborough, New Zealand.

Pietersen, G. 2008. Current studies on leafroll control in South Africa. Presentation: New Zealand Wine Producers, Marlborough, New Zealand, 12 March.

Pietersen, G. 2008. Current studies on leafroll control in South Africa. Presentation: New Zealand Wine Producers, Marlborough, New Zealand, Nelson, New Zealand, 13 March.

Pietersen, G. 2009. Grapevine leafroll disease in South Africa. Presentation: Producers invited by Golan Heights Winery, Israel, 19 May.

Jooste, A E C, Goszczynski, D E, Burger, J T and Pietersen, G. 2009. Identification of a third molecular variant of grapevine leafroll associated virus-3 (GLRaV-3) associated with grapevine leafroll disease in vineyards of the Western Cape. Paper presented at the 46th Congress of the South African Society for Plant Pathology, Gordon’s Bay, South Africa, 25-28 January.

Pietersen, G. 2009. A South African experience in combating/controlling grapevine leafroll disease. Paper presented at the 15th Romeo Bragato Conference, Napier, New Zealand, 20-24 August.

Pietersen, G. 2009. Principles and problems related to rouging and replacement strategies. Paper presented at the 15th Romeo Bragato Conference, Napier, New Zealand, 20-24 August.

Pietersen, G. 2009. Grapevine leafroll epidemiology and control in south Africa. Paper presented at the 15th Romeo Bragato Conference, Napier, New Zealand, 20-24 August.

Jooste, A E C, Maree, H J, Pietersen, G, Goszczynski, D E and Burger, J T. 2009. Identification and distribution of three divergent molecular variants of GLRaV-3 in South African vineyards. Paper presented at the 16th Congress of the International Council for the Study of Virus and Virus-like Diseases of the Grapevine, Dijon, France, 31 August – 4 September

Pietersen, G, Spreeth, N, Oosthuizen, W T, Van Rensburg, A, Lottering, D, Tooth, D and Rossouw, N. 2009. A case study of control of grapevine leafroll disease spread on Vergelegen Wine Estate, South Africa from 2002 to 2008. Paper presented at the 16th Congress of the International Council for the Study of Virus and Virus-like Diseases of the Grapevine, Dijon, France, 31 August – 4 September

Douglas, N, Pietersen, G and Kruger, K. 2009. A real time RT-PCR assay for the detection and quantification of grapevine leafroll-associated virus 3 (GLRaV-3) in Vitis Vinifera L. (Vitaceae) and Planoccus ficus (Signoret) (Hemiptera; Pseudoccidae). Paper presented at the 16th Congress of the International Council for the Study of Virus and Virus-like Diseases of the Grapevine, Dijon, France, 31 August – 4 September

. Pietersen, G, Oosthuizen, W T, Jooste, E, Filippin, L, Bertazzon, N and Angelini, E. 2009. Shiraz disease and grapevine yellows in South Africa. Paper presented at the 16th Congress of the International Council for the Study of Virus and Virus-like Diseases of the Grapevine, Dijon, France, 31 August – 4 September

Pietersen, G. 2010. Review of grapevine leafroll disease research and application 2003-2010. VinPro Winetech Regional Information Day, Vredendal, South Africa, 4 May

Pietersen, G. 2010. Successful control of grapevine leafroll disease at Vergelegen Wine Estate, Worcester, South Africa, 6 May.

Pietersen, G. 2010. Review of grapevine leafroll disease research and application 2003-2010. VinPro Winetech Regional Information Day

Pietersen, G. 2010. Successful control of grapevine leafroll disease at Vergelegen Wine Estate. VinPro Winetech Regional Information Day Robertson, South Africa, 11 May.

Pietersen, G. 2010. Review of grapevine leafroll disease research and application 2003-2010. 2) Successful control of grapevine leafroll disease at Vergelegen Wine Estate. VinPro Winetech Regional Information Day, Stellenbosch, South Africa, 12 May.

Pietersen, G. 2010. Principles of grapevine leafroll disease control and Successful control of grapevine leafroll disease at Vergelegen Wine Estate. Constantia Interest Group, Cape Town, South Africa

Pietersen, G. 2010. 1) Principles of grapevine leafroll disease control. 2) Successful control of grapevine leafroll disease at Vergelegen Wine Estate. Domain Brahm, Paarl, South Africa, 27 May.

Pietersen, G. 2010. The management of grapevine leafroll disease at Terrason Grapevine Training Programme. Wellington, South Africa, 2 June

Pietersen, G. 2011. Control of grapevine leafroll in South Africa. Winetech Virus Day. Stellenbosch, South Africa, 24 May

Pietersen, G. 2011. Progress on control of leafroll in South Africa. Uniwines Producers Study Group, Rawsonville, South Africa, 26 May.

Paper
Pietersen, G. 2006. Use of remote sensing to monitor the spread of grapevine leafroll disease in South Africa, IN: Proceedings of the 15th Congress of the International Council for the Study of Virus and Virus-like Diseases of the Grapevine. (p. 122-123) 3-7 April 2006,

Pietersen, G. 2006. Spatio-temporal distribution dynamics of grapevine leafroll disease in Western Cape vineyards, IN: Proceedings of the 15th Congress of the International Council for the Study of Virus and Virus-like Diseases of the Grapevine. (p. 126-127) 3-7 April 2006,

Saccaggi, D L, Kruger, K, Pietersen, G. 2006. Rapid identification of three mealybug species by multiplex PCR, IN: Proceedings of the 15th Congress of the International Council for the Study of Virus and Virus-like Diseases of the Grapevine. (p. 124-125) 3-7 April 2006,

Spreeth, N, Oosthuizen, W T, Van Rensburg, A, Tooth, D, Rossouw, N, Pietersen, G. 2006. Vergelegen, South Africa: A case study of an integrated control strategy to prevent the spread of grapevine leafroll disease, IN: Proceedings of the 15th Congress of the International Council for the Study of Virus and Virus-like Diseases of the Grapevine. (p. 142-143) 3-7 April 2006,

FinalReport-G2.pdf
FinalReport-G2a.pdf

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