Implementing integrated pest management in vineyards
Walton, V M
University of Stellenbosch
The inundative releases of a mealybug parasite, Coccidoxenoides peregrinus was carried out in thirteen vineyards distributed between Stellenbosch (3), Paarl (1), Robertson (3) and the Hex River Valley (6). C. peregrinus numbers were higher in the release areas compared to the two other areas. C. peregrinus was shown to have a significant impact on percentage parasitism in the release blocks. Release areas had lower fruit loss compared to the buffer and control areas. This method of control compares favourably to the recommended IPM practices concerning the degree of control of vine mealybug. Other natural enemies were also monitored in release, buffer and control areas and consisted mainly of Anagyrus and Leptomastix species. These natural enemies were however displaced by mass released C. peregrinus in the release areas.
Walton, V M. 2002. Evaluation of biological control of vine mealybug by mass releases of C. peregrinus. Poster present at the 1st International Symposium on Biological Control of Arthropods. 24-28 January, Honolulu, Hawaii.
Walton, V M. 2002. The role of genetics and evolution in biological control. Poster presented at the IOBC International Symposium on Biological Control. 14-16 October 2002, Montpellier, France.
Walton, V M. 2003. Pesticides in non-target agricultural environments, environmental and economic implications. Paper presented at the Joint European and Southern African International Conference. 21-23 January 2003, University of Cape Town, Cape Town, South Africa.
Walton, V M. 2003. South African perspective on the vine mealybug problem. Paper presented at the Unified Wine and Grape Symposium. 28-31 January 2003, Sacramento, California, United States.
Walton, V M. 2003. Developments in and future of mealybug research. Presentation at the Virus Work Group, ARC Infruitec-Nietvoorbij. 5 May, Stellenbosch, South Africa
Walton, V M. 2003. Effects of pesticides and fungicides used on grapevines on the mealybug predatory beetle Nephus ‘boschianus’ (Coccinellidae, Scymnini). Pesticides in non-target agricultural environments, environmental and economic implications. Paper presented at the Joint European Southern African International Conference. 21-23 January 2003, University of Cape Town, Cape Town, South Africa.
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