caa a22 4500 465725562 CHVBK 20180323111728.0 cr unu---uuuuu 170327e19901201xx s 000 0 eng 10.1071/APP9900141 doi (NATIONALLICENCE)springer-10.1071/APP9900141 Phytotoxicity of phosphonic (phosphorous) acid and fosetyl-Al to the host in mycorrhizal cultures on maize [Elektronische Daten] [N. Wellings, J. Thompson, M. Fiske] Phosphonic acid (0.1 g per pot) and fosetyl-Al (0.148 g per pot) applied as soil drenches before planting to control Pythium myriotylum in VAM cultures on maize (Zea mays) decreased top dry weight and mycorrhizal root length. Per cent mycorrhizal root length was not significantly reduced indicating phytotoxicity but not fungitoxicity of the chemicals to VAM. Treated plants were stunted and rosetted with white, variegated streaking of the leaves symptomatic of phosphonate injury. Metalaxyl (0.0125 g per pot as a soil drench or 0.0188 g per pot as granules) did not adversely affect plant growth or mycorrhizal root length and hence metalaxyl granules are routinely used to inhibit Pythium contamination of our rnycorrhizal cultures. Australasian Plant Pathology Society, 1990 Wellings N. Queensland Wheat Research Institute, PO Box 2282, 4350, Toowoomba, Queensland aut Thompson J. Queensland Wheat Research Institute, PO Box 2282, 4350, Toowoomba, Queensland aut Fiske M. Queensland Wheat Research Institute, PO Box 2282, 4350, Toowoomba, Queensland aut Australasian Plant Pathology Springer Netherlands 19/4(1990-12-01), 141-142 0815-3191 19:4<141 1990 19 13313 https://doi.org/10.1071/APP9900141 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1071/APP9900141 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wellings N. Queensland Wheat Research Institute, PO Box 2282, 4350, Toowoomba, Queensland aut NATIONALLICENCE 700 1- Thompson J. Queensland Wheat Research Institute, PO Box 2282, 4350, Toowoomba, Queensland aut NATIONALLICENCE 700 1- Fiske M. Queensland Wheat Research Institute, PO Box 2282, 4350, Toowoomba, Queensland aut NATIONALLICENCE 773 0- Australasian Plant Pathology Springer Netherlands 19/4(1990-12-01), 141-142 0815-3191 19:4<141 1990 19 13313 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer