caa a22 4500 469105909 CHVBK 20180323133056.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1071/APP9920150 doi (NATIONALLICENCE)springer-10.1071/APP9920150 Species of root-knot nematodes ( Meloidogyne spp.) affecting tobacco in north Queensland, including two new host races of M. arenaria [Elektronische Daten] [J. Stanton, P. O'Brien, L. Schipke, A. Hugall, C. Moritz] Thirty-six tobacco crops in the Mareeba-Dimbulah tobaccogrowing region of north Queensland were sampled and 50% of these were infected by root-knot nematodes. These nematodes were identified by perineal patterns, reactions of standard differential host plants, ß-esterase phenotypes and restriction fragment length polymorphisms in mitochondrial DNA (mtDNA) and in a I.8kb mtDNA polymerase chain reaction (PCR) product. Field populations were found to contain one or more of M. javanica, M. arenaria race 2 and two variants of M. arenaria race 2. It is suggested that these variants be considered as races 2a and 2b of M. arenaria. These new races can be differentiated from M. arenaria race 2 by their reduced reproduction on Bothriochloa insculpta cv. Hatch and Chloris gayana cv. Callide, by ß-esterase phenotype and by RFLPs of mtDNA and an mtDNA PCR product. They can be distinguished from each other by differential reproduction on Brachiaria humidicola and C. gayana cv. Samford. Australasian Plant Pathology Society, 1992 Stanton J. Plant Pathology Branch, Queensland Department of Primary Industries, Meiers Road, 4068, Indooroopilly, Queensland aut O'Brien P. Plant Pathology Branch, Queensland Department of Primary Industries, Meiers Road, 4068, Indooroopilly, Queensland aut Schipke L. Plant Pathology Branch, Queensland Department of Primary Industries, 4880, Mareeba, Queensland aut Hugall A. Department of Zoology, University of Queensland, 4072, St. Lucia, Queensland aut Moritz C. Department of Zoology, University of Queensland, 4072, St. Lucia, Queensland aut Australasian Plant Pathology Springer Netherlands 21/4(1992-12-01), 150-157 0156-0972 21:4<150 1992 21 13313 https://doi.org/10.1071/APP9920150 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1071/APP9920150 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Stanton J. Plant Pathology Branch, Queensland Department of Primary Industries, Meiers Road, 4068, Indooroopilly, Queensland aut NATIONALLICENCE 700 1- O'Brien P. Plant Pathology Branch, Queensland Department of Primary Industries, Meiers Road, 4068, Indooroopilly, Queensland aut NATIONALLICENCE 700 1- Schipke L. Plant Pathology Branch, Queensland Department of Primary Industries, 4880, Mareeba, Queensland aut NATIONALLICENCE 700 1- Hugall A. Department of Zoology, University of Queensland, 4072, St. Lucia, Queensland aut NATIONALLICENCE 700 1- Moritz C. Department of Zoology, University of Queensland, 4072, St. Lucia, Queensland aut NATIONALLICENCE 773 0- Australasian Plant Pathology Springer Netherlands 21/4(1992-12-01), 150-157 0156-0972 21:4<150 1992 21 13313 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer