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We have characterised six Australian Cucumber mosaic virus (CMV) strains belonging to different subgroups, determined by the sequence of their complete RNA 3 and by their host range and the symptoms they cause on species in the Solanaceae, Cucurbitaceae and on sweet corn. These data allowed...
The pathogen that causes a leaf blotch and a rot of cymbidium orchids in New Zealand has been identified as Phytophthora multivesiculata using morphological characteristics and Internal Transcribed Spacer (ITS) fingerprinting. It is widespread in the North Island of the country.
A series of experiments was conducted to assess the effect of different levels of initial anthracnose inoculum (as transplanted infected seedlings) on final infection and yield of lupins. The influences of environment and cultivar resistance on anthracnose infection were also examined....
A technique that enables observation of primary and secondary stages of the life cycle of Plasmodiophora brassicae in brassica roots is described. Brassica seeds were sown directly into 5 mL pippette tips containing an acid-washed, coarse, mixed-grade sand. These were suspended in a buffered...
The contents of galls formed by Anguina woodi in Ehrharta villosa var. villosa from South Africa were examined. Bacterial colonisation was evident in six of 48 galls and inhibited nematode development, but did not prevent it in all cases. Galls without evident bacterial colonisation contained a...
Pantoea ananas is described for the first time in Australia as a pathogen of rice (Oryza sativa). Necrotic lesions occurred on the rachis and stem, extending into the flag leaf sheath and stopping at the second node. Lesions were often observed on the flag leaf sheath near the collar. Affected...
Lupinus mutabilis (pearl lupin) P26956 remained uninfected after repeated sap inoculations with Cucumber mosaic virus (CMV) isolates LW, SN-1, CP, LE, SL and BA. In contrast, plants of L. mutabilis P26961 were readily infected by isolates LW, SN-1 and CP. Isolates LE, SL and BA infected most or...
Tomato spotted wilt virus (genus Tospovirus) is recorded on chickpea (Cicer arietinum) in Australia for the first time. It caused shoot tip symptoms of wilting, necrosis, bunching and chlorosis, followed by premature death of plants.
A new pathotype of Bremia lactucae was identified from lettuce in Australia in 2001. It differs only slightly from AUS 2 by possessing an additional virulence factor and it is proposed that it be named AUS 3.
Pinus spp. have a number of fungal endophytes of which the latent pathogen Diplodia pinea is a well-known example. In this study, 12 simple sequence repeat (SSR) markers were used to consider the origin of the southern hemisphere isolates and to evaluate genetic diversity and gene flow between...
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