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Isolations from affected plant parts of pyrethrum exhibiting flower bud abortion and necrotic symptoms consistently yielded a Phoma sp., identified as the anamorph of Didpella ligulicola, the causal agent of ray blight of chrysanthemum. Pathogenicity of both mycelial and conidial inoculum of the...
We examined the differentiation of 22 Australian isolates of cucumber mosaic cucumovirus (CMV) by comparing PAGE mobilities of the three RNAs (dsRNA mobilities), serogroups using monoclonal antibodies, dot blot hybridisation (DBH) with subgroup-specific RNA 3 probes and PCR-restriction enzyme...
Soil drenches and foliar sprays of potassium phosphonate protected glasshouse-grown Xanthorrhoea minor and X australis against root rot caused by Phytophthora cinnamomi. Three concentrations of potassium phosphonate (0.1, 1.0 and 5.0 mg/mL), applied by both methods, reduced the severity of root...
Fusarium oxysporum was isolated from flannel flowers (Actinotus helianthi) which were severely wilted. Isolates of the fungus were used to inoculate healthy seedlings. Symptoms, similar to those observed in the original seedlings, were observed after 17 weeks and the fungus re-isolated.
Burning of fossil fuel, large scale clearing of forests and other human activities have changed global climate. Atmospheric concentration of radiatively active CO2, methane, nitrous oxide and chlorofluorocarbons has increased to cause global warming. In Australia temperature is projected to rise...
Bauxite mining in Western Australia occurs in forest infested with Phytophthora cinnamomi. The mining company Alcoa identified the need for a treatment to eradicate P. cinnamomi from relatively small volumes (<60 m3) of topsoil and gravel. This study examined the efficacy of copper sulphate...
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