ISHS Acta Horticulturae 185: I International Protea Research Symposium
CONTROL OF PHYTOPHTHORA ROOT ROT OF PROTEAS IN SOUTH AFRICA |
| Authors: | S.L. von Broembsen, G.J. Brits |
| Abstract:
Root rot caused by Phytophthora cinnamomi is a limiting factor in the production of cut flowers from Leucospermum, Leucadendron, Serruria and Banksia spp. in South Africa. Prevention remains the most effective method of controlling this disease. However, the widespread occurrence of P. cinnamomi in mountain fynbos vegetation and rivers of the southwestern Cape Province poses special problems in preventing root rot. Cultural methods which reduce or avoid conditions favourable for disease are also an important means of control. Attempts to develop fungicide treatments which give good field control for highly susceptible proteas have been largely unsuccessful. Plant breeding is probably the most promising approach to disease control. There is considerable resistance in the genus Protea and the more resistant Protea spp. can be used on infested lands. There is also tolerance in the genus Leucospermum which might be utilized in breeding programs and for rootstock development. | |
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