The role of insects in the dispersal of trunk disease pathogens

Project Number
WW 06-39

Project title
The role of insects in the dispersal of trunk disease pathogens

Project leader
Halleen, F

Team members
Halleen, F
Mostert, L
Allsopp, E
Knipe, M
Du Plessis, N
Marais, D
Rosenburg, J
Shubane, A

Project description
Several pathogens are associated with trunk diseases of grapevines. These pathogens cause the decline and dieback of grapevines, which leads to severe economic losses due to the reduction in quantity and quality of grapes. The control of trunk disease pathogens is difficult since no fungicides are available or registered. Consequently, the management of inoculum sources must form part of an integrated disease management strategy. Infected planting material is a known source of inoculum, however, the spread from infected vines to healthy vines remains unclear. Insects could be role players in the spread of trunk disease pathogens, but very little research has been done in this area.

The objectives of this study will be to:
1. determine if any particular insects are associated with declining grapevines and
2. determine if specific trunk disease pathogens occur within and/or on these insects.

Poster(s)
Moyo, P. 2013. Ants and millipedes as vectors of Phaemoniella chlamdospora to grapevine pruning wounds. Poster presented at the 10th International Congress of Plant Pathology. 25-30 August, Beijing, China.

Moyo, P. 2013. Grapevine pruning wound sap as food source for millipedes and cocktail ants, two of the main carriers of Petri disease pathogens. Poster presented at the 48th Congress of the Southern African Society for Plant Pathology. 20-24 January, Bela Bela, South Africa

Presentation(s)
Halleen, F. 2009. Grapevine trunk disease research. Presentation at the Friday Forum, University of Stellenbosch. Faculty of AgriScience. Department of Plant Pathology, 18 November, Stellenbosch, South Africa.

Moyo, P, Mostert, L, Halleen, F, Roets, F and Allsopp, E. 2010. The role of arthropods in the dispersal of grapevine trunk disease pathogens associated with Petri disease and esca. Presentation at the Friday Forum, University of Stellenbosch. Faculty of AgriScience. Department Plant Pathology. 12 November, Stellenbosch, South Africa.

Moyo, P, Mostert, L, Halleen, F and Allsopp, E. 2011. Detection of Petri disease and esca fungi on arthropods associated with grapevines. Presentation to the Friday Forum. University of Stellenbosch. Faculty of AgriScience. Department of Plant Pathology. 15 April, Stellenbosch, South Africa.

Moyo, P, Mostert, L, Halleen, F and Allsopp, E. 2011. The role of arthropods in the dispersal of fungi associated with Petri disease and esca of grapevine. Lecture. University of Stellenbosch, Faculty of AgriScience, Department of Plant Pathology. 15 April, Stellenbosch, South Africa.

Halleen, F. 2012. Grapevine trunk disease research. Presentation at the ARC Infruitec-Nietvoorbij Information Day. 26 July, Stellenbosch, South Africa.

Halleen, F. 2012. Thrip Audit: Epidemiology and etiology of esca on grapevine in South Africa. Presentation at the ARC Infruitec-Nietvoorbij Information Day. 28 August, Stellenbosch, South Africa.

Moyo, P, Halleen, F, Roets, R, Allsopp, E and Mostert, L. 2012. Grapevine sap as food source for millipedes and ants, the carriers of Petri disease pathogens. Lecture. University of Stellenbosch, Department of Plant Pathology. 18 October, Stellenbosch, South Africa.

Moyo, P, Halleen, F, Roets, R, Allsopp, E and Mostert, L. 2012. Anthropods disseminate Petri and several other grapevine trunk disease pathogens. Paper presented at the 8th International Workshop on Grapevine Trunk Diseases. 18-21 June, Valencia, Spain.

Moyo, P. 2012. Dissemination of Petri disease and esca pathogens by anthropods. Paper presented at the 34th National Congress of the South African Society for Enology and Viticulture. 14-16 November, Somerset West, South Africa.

Moyo, P. 2013. Detection of Petri disease and esca pathogens on anthropods found in vineyards. Paper presented at the 48th Congress of the Southern African Society for Plant Pathology. 20-24 January, Bela Bela, South Africa.

Moyo, P, Halleen, F, Roets, R, Allsopp, E and Mostert, L. 2013. The role of arthropods in the dispersal of grapevine trunk disease. Presentation at the Winetech VinPro Information Day. 18 April, Bienne Donne, Stellenbosch, South Africa.

Moyo, P, Halleen, F, Roets, R, Allsopp, E and Mostert, L. 2013. Oordra van patogene deur duisendpote op snoeiwonde. Presentation at the Winetech VinPro Information Day. 6 August, Robertson, South Africa.

Moyo, P, Halleen, F, Roets, R, Allsopp, E and Mostert, L. 2013. Oordra van patogene deur duisendpote op snoeiwonde. Presentation at the Winetech VinPro Information Day. 7 August, Worcester, South Africa.

Moyo, P, Halleen, F, Roets, R, Allsopp, E and Mostert, L. 2013. Oordra van patogene deur duisendpote op snoeiwonde. Presentation at the Winetech VinPro Information Day. 8 August, Paarl, South Africa.

Moyo, P, Halleen, F, Roets, R, Allsopp, E and Mostert, L. 2013. Oordra van patogene deur duisendpote op snoeiwonde. Presentation at the Winetech VinPro Information Day. 13 August, Vredendal, South Africa.

Moyo, P, Halleen, F, Roets, R, Allsopp, E and Mostert, L. 2013. Oordra van patogene deur duisendpote op snoeiwonde. Presentation at the Winetech VinPro Information Day. 4 September, Stellenbosch, South Africa.

Article
Moyo, P, Allsopp, E, Roets, F, Mostert, L, Halleen, F. 2014. Arthropods vector grapevine trunk disease pathogens, Pythopathology, Mnth October v. 104 (10) (p. 1063-1069)
http://dx.doi.org/10.1094/PHYTO-11-13-0303-R

Dissertation
Moyo, P. 2013. The role of arthropods in the dispersal of trunk disease pathogens associated with Petri disease and Esca. PhD. (Agric) University of Stellenbosch, Stellenbosch, South Africa.

FinalReport.pdf

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