caa a22 4500 465725503 CHVBK 20180323111728.0 cr unu---uuuuu 170327e19901201xx s 000 0 eng 10.1071/APP9900122 doi (NATIONALLICENCE)springer-10.1071/APP9900122 Phosphonic (phosphorous) acid treatments control Phytophthora diseases in avocado and pineapple [Elektronische Daten] [K. Pegg, A. Whiley, P. Hargreaves] Trunk injections of partially neutralised solutions of phosphonic (phosphorous) acid were very effective for the rehabilitation and protection of avocado trees infected by Phytophthora cinnamomi. Injections at flush maturity were more effective for the accumulation of phosphonate in feeder roots than when trees were actively flushing. Chemically compatible mixtures of phosphonic acid and zinc salts increased zinc leaf concentrations above the critical threshold concentration (30 mg/kg DM). A single pre-harvest spray of potassium phosphonate or four post-plant sprays of potassium phosphonate controlled root and heart rot of pineapple caused by P. cinnamomi. Australasian Plant Pathology Society, 1990 Pegg K. Plant Pathology Branch, Queensland Department of Primary Industries, Meiers Road, 4068, Indooroopilly, Queensland aut Whiley A. Horticulture Branch, Queensland Department of Primary Industries, Maroochy Horticultural Research Station, 4560, Nambour, Queensland aut Hargreaves P. Agricultural Chemistry Branch, Queensland Department of Primary Industries, Meiers Road, 4068, Indooroopilly, Queensland aut Australasian Plant Pathology Springer Netherlands 19/4(1990-12-01), 122-124 0815-3191 19:4<122 1990 19 13313 https://doi.org/10.1071/APP9900122 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1071/APP9900122 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pegg K. Plant Pathology Branch, Queensland Department of Primary Industries, Meiers Road, 4068, Indooroopilly, Queensland aut NATIONALLICENCE 700 1- Whiley A. Horticulture Branch, Queensland Department of Primary Industries, Maroochy Horticultural Research Station, 4560, Nambour, Queensland aut NATIONALLICENCE 700 1- Hargreaves P. Agricultural Chemistry Branch, Queensland Department of Primary Industries, Meiers Road, 4068, Indooroopilly, Queensland aut NATIONALLICENCE 773 0- Australasian Plant Pathology Springer Netherlands 19/4(1990-12-01), 122-124 0815-3191 19:4<122 1990 19 13313 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer