Abstract
Soil drenches and foliar sprays of potassium phosphonate protected glasshouse-grown Xanthorrhoea minor and X australis against root rot caused by Phytophthora cinnamomi. Three concentrations of potassium phosphonate (0.1, 1.0 and 5.0 mg/mL), applied by both methods, reduced the severity of root rot symptoms and increased plant survival rates. Soil drenches were more effective than foliar sprays. The highest rate of foliar spray (5.0 mg/mL) was phytotoxic to both species, causing burning of leaf tips.
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An erratum to this article is available at http://dx.doi.org/10.1007/BF03213708.
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Ali, Z., Guest, D.I. Potassium phosphonate controls root rot of Xanthorrhoea australis and X minor caused by Phytophthora cinnamomi . Australasian Plant Pathology 27, 40–44 (1998). https://doi.org/10.1071/AP98003
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DOI: https://doi.org/10.1071/AP98003