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Plant and Soil

, Volume 107, Issue 1, pp 107–112 | Cite as

Phytophthora root-rot of container-grown citrus as affected by foliar sprays and soil drenches of phosphorous and acetyl salicylic acids

  • G. E. Walker
Article

Abstract

Mycelial growth ofPhytophthora nicotianae var.parasitica in vitro was inhibited by phosphorous and acetyl salicylic acids at 10 ppm; mycelial growth ofP. citrophthora was inhibited by phosphorous acid at 10 ppm and acetyl salicylic acid at 100 ppm. Foliar sprays and soil drenches with these chemicals were compared with soil applications of metalaxyl as treatments for Phytophthora root-rot of container-grown citrus (var. Cleopatra mandarin) caused by the aforementioned spp. Foliar sprays with 0.1% phosphorous acid were as effective as the metalaxyl treatment in promoting root growth and phosphorous acid offers considerable potential as an alternative treatment for Phytophthora root-rot of citrus.

Key words

acetyl salicylic acid citrus metalaxyl phosphorous acid Phytophthora citrophthora P. nicotianae var.parasitica root-rot 

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Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • G. E. Walker
    • 1
  1. 1.South Australian Department of AgricultureLoxton Research CentreLoxton

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