This paper reports the first detections of Morulaimus gigas outside Western Australia in turf samples from South Australia, Victoria, New South Wales and Queensland. New infestations were also found in turf samples from Western Australia. Approximately 7% of turf samples tested between 1996 and 2008 contained M. gigas with 87% of these above the damage threshold. M. gigas was associated with turf decline in bent grass, Agrostis tenuisa new addition to the previously recorded hosts.
Summary. Seventeen sites, including locations in all the
major white clover growing regions of Australia, were surveyed for the
presence of plant parasitic nematodes in autumn and spring 1993.
Trifolium repens L. cvv. Haifa and Irrigation, plus 1
other cultivar, were sampled at each site and nematodes extracted from roots,
stems and soil. Thirteen genera of plant parasitic nematodes were detected.
The clover cyst nematode, Heterodera trifolii, and root
knot nematodes, Meloidogyne spp., were each recorded at
over 75% of the sites. The most common genera of plant parasitic
nematodes detected were Tylenchus, which was present at
all sites, and Pratylenchus (root lesion nematode),
which was present at all but 1 site. Other plant parasitic nematode genera
found included Ditylenchus,
Helicotylenchus and Paratylenchus.
The widespread presence of nematodes in white clover pastures, and the high
populations at some sites, suggest that they may be economically important to
the Australian dairy industry.
Abstract. Bursaphelenchus hunanensis (Nematoda: Aphelenchida: Parasitaphelenchidae), identified morphologically in 2001, was associated with dying trees from several species of the genus Pinus at several locations around Melbourne, Victoria. This is the first record for Australia of this nematode and the first detection of this species outside China. The nematode was apparently eradicated through a targeted campaign and perhaps poor vectors. This success is significant because it demonstrates that eradication may be a viable strategy for dealing with incursions of exotic nematodes.
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