ISHS Acta Horticulturae 545: V International Protea Research Symposium
PROTEACEAE PATHOGENS: THE SIGNIFICANCE OF THEIR DISTRIBUTION IN RELATION TO RECENT CHANGES IN PHYTOSANITARY REGULATIONS |
| Author: | J.E. Taylor |
| Keywords: | protea diseases, Australia, export, Proteaceae, quarantine, South Africa, U.S.A. |
| Abstract:
Pathogens of proteas causes losses to producers in terms of lower productivity, a reduction in aesthetic qualities, and from phytosanitary rejections during export. Protea pathogens in South Africa are fairly well documented, but little is known about pathogens of South African proteas cultivated elsewhere in the world. The recent Sanitary and Phytosanitary Agreement (SPS) ratified by the World Trade Organisation (WTO), demands a scientific basis for phytosanitary decisions and regulations. However, currently phytosanitary decisions are carried out on the basis of little or no prior knowledge of the fungus in the importing country. Obviously there are implications for trade and this highlights the need for a science-based study of protea pathogens. Moreover, global transfer of protea germplasm and the re-importation of propagation material into South Africa poses disease risks for the native flora, from introduced pathogens. In order provide a basis for the development of science-based plant quarantine decisions and regulations, studies have been undertaken on the pathogens of proteas cultivated in Australia, South Africa, the U.S.A. and Zimbabwe. The results of the studies of the pathogens recorded in protea plantations are discussed. These illustrate that many pathogens, which cause rejection at quarantine, are already established in the importing countries. In addition, the findings highlight the need for further studies. | |
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