Pathogenicity of 21 newly described Phytophthora species against seven Western Australian native plant species. (29th January 2018)

• Record Type: Journal Article
• Authors: Belhaj, R.; McComb, J.; Burgess, T. I.; Hardy, G. E. St. J.
• Is Part Of: Plant pathology. Volume 67:Number 5(2018)
• Page Start: 1140
• Page End: 1149
• Publication Date: 2018-01-29
• Subjects: Phytophthora boodjera -- Phytophthora constricta -- Phytophthora elongata -- Phytophthora moyootj -- Phytophthora niederhauserii -- Phytophthora rosacearum; Agricultural pests -- Periodicals; Plant diseases -- Periodicals; 632
• DOI: 10.1111/ppa.12827
• Languages: English
• ISSNs: 0032-0862

Abstract

Abstract : The pathogenicity of some Phytophthora species recently described from Western Australia, together with P. cinnamomi as a control, was tested against seven Western Australian native plant species in the glasshouse. Host species were Banksia grandis, B. littoralis, B. occidentalis, Casuarina obesa, Corymbia calophylla, Eucalyptus marginata and Lambertia inermis . Twenty‐two Phytophthora species were grown on a vermiculite, millet seed and V8 substrate and used as soil inoculum when the plant hosts were approximately 3 months old. Pathogenicity was assessed after 6 weeks and plants were scored for death, root damage, and percentage reduction of shoot growth compared with control plants. The pathogenicity of P. cinnamomi was confirmed. Phytophthora niederhauserii was shown to be similar to P. cinnamomi in pathogenicity and of concern ecologically. Other species that killed one or more hosts were P. boodjera, P. constricta, P. elongata, P. moyootj and P. rosacearum, while P. condilina, P. gibbosa, P. gregata, P. litoralis and P . 'personii' caused significant reduction to shoot and/or root growth, but did not kill plants. Host species susceptible to the highest number of Phytophthora species were B. grandis, B. littoralis, B. occidentalis and E. marginata . No Phytophthora species tested killed C. calophylla .