Abstract
Phosphonic acid applied as a soil drench, a foliar spray or a trunk injection before infection prevented the development of cankers in almond and cherry trees inoculated with Phytophthora cambivora. Foliar applications of 2 g phosphonic acid/L in autumn and spring were an effective and practical treatment. Trunk injections were also effectively but in some cases caused severe leaf scorch and leaf drop.
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References
Wicks, T.J. (1988)—Effect of metalaxyl on the control of Phytophthora crown rot of almonds. Australian Journal of Experimental Agriculture 28: 547–552.
Wicks, T.J. and Hall, B. (1988)—Preliminary evaluation of phosphorous acid, fosetyl-Al and metalaxyl for controlling Phytophthora cambivora on almond and cherry. Crop Protection 7: 314–318.
Wicks, T.J. and Lee, T.C. (1986)—Phytophthora crown rot of almond trees. Australian Journal of Agricultural Research 37: 277–287.
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Wicks, T., Hall, B. Evaluation of phosphonic (phosphorous) acid for the control of Phytophthora cambivora on almond and cherry in South Australia. Australasian Plant Pathology 19, 132–133 (1990). https://doi.org/10.1071/APP9900132
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DOI: https://doi.org/10.1071/APP9900132