Control of graft union rot in grape vine nurseries with sanitation, fungicidal and biological control treatments
Fourie, P H
Poor take of grafted vines in nurseries can partly be attributed to infection of graft unions and the rotting thereof. General take percentages during the 1997 – 1998 and 1998 – 1999 seasons were 46 and 47%, respectively. The aim of this project is to evaluate several sanitation, fungicidal and biological control treatments for control of graft union infection and to determine whether these treatments would increase percentage take and thus limit losses in nurseries.
Two nurseries in Wellington (Micha and Voor-Groenberg), where grafting, callus and planting will be done, were selected. Preliminary arrangements for the research actions were discussed with the parties involved.
Five treatments were formulated: captan (Merpan 50 SC at 1000 mL/100 L water), Sporekill (150 mL/100 L water), captan/Sporekill (above concentrations), Trichoflow (2 g/L water), and tap water (control).
The rootstock (2500 x Richter 110 [RQ28B-XAM]) and scion (2500 x Cabernet Sauvignon [CS46C-XH]) material were drenched for 10 minutes in each of these treatments (500 each per treatment) prior to cold storage. The rootstock and scion material will again be treated after cold storage, prior to grafting. Grafting will be done during the first week of September.
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Fourie, P H and Halleen, F. 2001. Grapevine decline in South Africa with specific reference to black goo decline and black foot disease. 13th Biennial Conference of the APPS, 24-27 September. Cairns, France.
Fourie, P H and Halleen, F. 2002. Proactive measures in nurseries to control black decline in grapevines. 40th Congress of the Southern African Society of Plant Pathology (SASPP), South Africa.
Fourie, P H and Halleen, F. 2002. Black goo simptome, voorkoming en bestryding. South African Society for Enology and Viticulture Vineyard Forum Winter Meeting, 7 June.
Fourie, P H and Halleen, F. 2002. Navorsing in die kwekerybedryf. Voor-Groenberg Nursery Information Day, 7 June.
Fourie, P H and Halleen, F. 2002. Proactive control measures for black goo decline in grapevine. 26th National Congress of the South African Society for Enology and Viticulture Congress. 14-15 November. Somerset West, South Africa.
Fourie, P H and Halleen, F. 2003. Proactive control measures for Petri disease in grapevine nurseries. 3rd International Workshop on Grapevine Trunk Diseases. 1-2 February. Lincoln, New Zealand.
Fourie, P H and Halleen, F. 2003. Nursery strategies for the proactive management of decline and dieback: research progress. National Congress of the South African Society for Enology and Viticulture. 5-7 November. Somerset West, South Africa.
Fourie, P H and Halleen, F. 2004. Proactive management of grapevine trunk disease in nurseries: an integrated approach. 42nd Congress of the Southern African Society of Plant Pathology (SASPP), South Africa.
Fourie, P H and Halleen, F. 2005. Integrated strategies for pro-active management of grapevine trunk diseases in nurseries. 4th International Workshop on Grapevine Trunk Diseases. 20-21 January. Stellenbosch, South Africa.
Fourie, P H, Halleen, F. 2006. Chemical and biological protection of grapevine propagation material from trunk disease pathogens, European Journal of Plant Pathology, v. 116 (p. 255-265)
Fourie, P H, Halleen, F. 2006. Sanitêre beheermaatreëls teen stampatogene in wingerdkwekerye, WineLand, Mnth Oct (206) (p. 80-82)
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