Journal article

Species of root-knot nematodes (Meloidogyne spp.) affecting tobacco in north Queensland, including two new host races of M. arenaria

JM Stanton, PC O'Brien, LG Schipke, A Hugall, C Moritz

Australasian Plant Pathology | Published : 1992

Abstract

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 the..

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University of Melbourne Researchers

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