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Journals and Conferences
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We investigated the identity and genetic diversity of more than 100 isolates belonging to Phyllosticta (teleomorph Guignardia), with particular emphasis on Phyllosticta citricarpa and Guignardia mangiferae s.l. occurring on Citrus. Phyllosticta citricarpa is the causal agent of Citrus Black Spot and is subject to phytosanitary legislation in the EU. This… (More)
A homothallic semipapillate slow growing Phytophthora species associated with root rot of strawberries from greenhouse-grown plants in North Carolina, USA, root rot of roses in the Netherlands, and root rot of raspberry in Knoxfield, Australia, was identified. The main character of this organism is the production of paragynous antheridia with broad… (More)
To help understand the diversity of Botryosphaeria species found on horticultural crops in Victoria and New South Wales, 30 isolates were identified using rDNA ITS sequences and elongation factor 1 α (EF-1 α) gene sequences. Cultures had been isolated over the last 25 years and originated from 14 plant species, and about half were from grapevines, stone… (More)
Phylogenetic analyses of Erysiphe alphitoides s. lat. using sequences of the rDNA ITS region and the D1/D2 domains of the 28S rDNA revealed a complex consisting of several genetically and morphologically distinguished taxa, including the already described Erysiphe alphitoides s. str. and E. hypophylla. The ascomata (chasmothecia) of E. hypophylla are… (More)
The powdery mildew fungi (Erysiphales) are a common group of obligate plant pathogens that can be extremely difficult to identify, depending on the reproductive stage encountered, The ribosomal DNA Internal Transcribed Spacer (ITS) region was assessed for its usefulness to link anamorphic Erysiphales with their respective teleomorphs. PCR primers for the… (More)
Despite their economic importance, the knowledge of the biodiversity of many plant pathogens is still fragmentary. In this study we show that this is true also for the white blister rust genus Pustula that is parasitic on several genera in the asterids, including sunflower and the gentian, Eustoma. It is revealed that several distinct species exist in… (More)
An undescribed species of Phytophthora, previously known only from asparagus, is reported causing a basal leaf rot leading to plant death in members of the Agavaceae at the Royal Botanic Gardens, Melbourne. Ribosomal DNA ITS sequences of isolates collected from Agave species in 2000,2002 and 2004 were identical to isolates from Asparagus. The fungus has… (More)
Colletotrichum sansevieriae was detected for the first time on nursery-grown plants of mother-in-law’s tongue (Sansevieria sp.) in Australia.
Phytophthora inundata and P. hedraiandra are reported for the first time in Australia. The former was found in soil around carrot and parsley crops in the Cranbourne area of Victoria. The latter is an historical collection from 1996, isolated from soil near horticultural polyhouses in Werribee, Victoria.
Pythium tracheiphilum, the cause of lettuce stunt, wilt and leaf blight, was recorded for the first time in Australia in July 2005, on gourmet lettuce at two farms at Gingin, near Perth, Western Australia. A subsequent survey of commercial lettuce crops failed to find symptoms of lettuce wilt and leaf blight at additional properties, and P. tracheiphilum… (More)