Rhizoctonia spp. associated with root rots of subterranean clover in Western Australia

Wong, DH; Sivasithamparam, Krishnapillai

doi:10.1016/s0007-1536(85)80152-2

Cited by 22 publications

(23 citation statements)

References 21 publications

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“…Path. 92 (1986) sterigmata and supporting hypha below basidium of our T. cucumeris isolates were similar to those of Rogers (1935), Talbot (1962, 1965), Parmeter et al (1967), Talbot (1970) and Wong and Sivasithamparam (1985), (Table 3).…”

Section: Anastomosis Groupingsupporting

confidence: 85%

Identity and pathogenicity of Rhizoctonia spp. associated with bare patch disease of cereals at a field site in Western Australia

Roberts

Sivasithamparam

1986

Netherlands Journal of Plant Pathology

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Roots of seedlings of wheat and barley affected by bare patch disease at a field site in Western Australia were assessed for root damage and plated to isolate fungi. The patches were variable in shape and size and had the most severely affected plants in the centre. Of the 165 isolates of Rhizoctonia spp. obtained, 90% were multinucleate and 10% binucleate, the former being predominant in the plants at the centre of the patch. The relative frequency of binucleate isolates increased with proximity to the periphery. The increase in activity of avirulent binucleate isolates towards the periphery of the patch may be related to the sharp and abrupt edging of the patch. A variety of other species of fungi such as Fusarium spp., Mortierella spp., Bipolaris sorokiniana, Pythium sp. and Trichoderma sp. were encountered within the patches. The multinucleate isolates belonging to anastomosis groups (Ag) 2-1, 2-2 and 8 (Thanatephorus cucumeris) were most pathogenic to wheat. The binucleate isolates of Ag C, D, E, and K (Ceratobasidiurn sp.) were less pathogenic. It is suggested that the bare patch disease is caused by a complex of root rot fungi composed of one or more anastomosis groups of Rhizoctonia spp. and other associated fungi.

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Section: Anastomosis Groupingsupporting

confidence: 85%

Identity and pathogenicity of Rhizoctonia spp. associated with bare patch disease of cereals at a field site in Western Australia

Roberts

Sivasithamparam

1986

Netherlands Journal of Plant Pathology

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“…Although C. destructans has been isolated previously from roots of strawberry (Manici et al 2005;Morocko 2006), it is usually considered as only a weak pathogen (Manici et al 2005). Pathogen complexes of soil-borne pathogens causing root disease, such as those associated with root rot in annual pasture legumes (e.g., Wong et al 1985), are common in WA sandy soils. It is possible that the same applies for other pathogens like C. destructans, which may be of greater significance in causing root disease of strawberry in WA as a component of a disease complex.…”

Section: Discussionmentioning

confidence: 99%

Severity of crown and root diseases of strawberry and associated fungal and oomycete pathogens in Western Australia

Fang

Phillips²,

et al. 2010

Australasian Plant Pathol.

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The decline/death of strawberry plants is considered to be a serious challenge to strawberry production in Western Australia (WA). Although crown and root diseases have been found to be important contributing factors, little is known on the extent of crown and root diseases or the associated fungal and oomycete pathogens. Surveys were undertaken in 2008 to determine the severity of crown and root diseases in commercial strawberry fields in WA, to determine the influence of cropping history, fumigation, soil nutrients and pH on severity of such diseases, and to identify the associated pathogens. Among the sites surveyed, there was a significant variation with the decline/ death index (%DI) ranging from 2.9 to 39.7. The level of strawberry plant decline/death progressed significantly from August to October, with the %DI rising from 13.0 to 39.2; There was a significant difference in strawberry plant decline/death between fumigated and non-fumigated beds, with a %DI of 7.1 for fumigated and 45.2 for nonfumigated beds. However, it was evident that in situations where there were periods of 3 or more years involving crop rotations between successive strawberry crops that the level of plant decline/death was lower, even in the absence of fumigation. Both the severity of crown disease and root disease were positively correlated with that of strawberry plant decline/death. There was a significant negative correlation between soil pH and the decline/death of strawberry plants. The main pathogens associated with crown and root diseases of strawberry were Fusarium oxysporum, Rhizoctonia spp. (

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“…While R. solani ZG4 (AG2-2) has been reported to cause hypocotyl rot on legumes (Sweetingham et al 1986) and soybean (Glycine max [L.] Merr.) (Fenille et al 2004), AG2-2 has been reported causing crown and root rot of H. coronarium in Queensland, Australia (Ryley et al 2004), root rot of subterranean clover (Wong and Sivasithamparam 1985;MacNish et al 1994 (Sumner 1985); wheat (T. aestivum) and barley (Furgal-Wegrzycka et al 1998); and several grasses (Haygood and Martin 1990;Herr and Fulton 1995).…”

Section: Discussionmentioning

confidence: 99%

“…Hence it is not surprising that root rot diseases play an important role in these regions on annual pasture productivity and persistence and can be caused by one or more of different fungal pathogens including species of Pythium, Phytophthora, Fusarium and Rhizoctonia (Wong et al 1985a;Barbetti et al 1986). Rhizoctonia solani causes root disease on many plant species worldwide including wheat (Triticum) (Roget 1995), oil-seed Brassica (Khangura et al 1999;Klein-Gebbinck and Woods 2002), pasture legumes (Barbetti et al 1986;Ryley et al 2004), tomato (Lycopersicum esculentum Miller) (Berta et al 2005), soybean (Glycine) (Dorrance et al 2003) and lupin (Kumar et al 2002;Chang et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Cross-pathogenicity of Rhizoctonia solani strains on pasture legumes in pasture-crop rotations

et al. 2007

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Rhizoctonia spp. associated with root rots of subterranean clover in Western Australia

Cited by 22 publications

References 21 publications

Identity and pathogenicity of Rhizoctonia spp. associated with bare patch disease of cereals at a field site in Western Australia

Identity and pathogenicity of Rhizoctonia spp. associated with bare patch disease of cereals at a field site in Western Australia

Severity of crown and root diseases of strawberry and associated fungal and oomycete pathogens in Western Australia

Cross-pathogenicity of Rhizoctonia solani strains on pasture legumes in pasture-crop rotations

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