Role of root disease in the poor establishment of <i>Medicago</i> pastures after cereal cropping in South Australia

Pankhurst, C. E.; Hawke, Bruce; McDonald, H. J.

doi:10.1111/ppa.1998.47.6.749

Cited by 11 publications

(3 citation statements)

References 22 publications

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“…Conversely, Fusarium spp. found in wheat contributed to root rot and poor establishment of subsequent legume-based pastures (Pankhurst et al 1998). Satyaprasad et al (1997) found that pathogenicity of F. avenaceum to potato tubers was not related to the plant species from which the isolates originated.…”

Section: Resultsmentioning

confidence: 98%

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Pathogenicity to Potato Tubers of Fusarium spp. Isolated from Potato, Cereal and Forage Crops

et al. 2008

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Section: Resultsmentioning

confidence: 98%

“…Strains of F. avenaceum are commonly implicated as causal agents of root rot and wilt in forage crops (Miller-Garvin and Viands 1994;Pankhurst et al 1998;Sivasithamparam 1993). In addition, various strains of F. avenaceum are also frequently isolated from asymptomatic alfalfa (Pegg and Parry 1983) and red clover plants (R.D.…”

Section: Resultsmentioning

confidence: 99%

Pathogenicity to Potato Tubers of Fusarium spp. Isolated from Potato, Cereal and Forage Crops

et al. 2008

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“…The role of R. solani in reducing the establishment of pasture legumes in Australia was demonstrated by Pankhurst et al (1998). Given the presence of AG-2-2 on several hosts in Queensland and in the temperate regions of southern Australia, it is likely that the pathogen will have an impact on the establishment and persistence of sulla in some areas, unless resistant or tolerant cultivars are developed.…”

Section: Discussionmentioning

confidence: 99%

Rhizoctonia crown and root rot of the pasture legume, sulla (Hedysarum coronarium)

Ryley

Lloyd²,

Johnson³

et al. 2004

Austral. Plant Pathol.

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Abstract. Rhizoctonia solani AG-2-2 was isolated from wilting and dying plants of sulla (Hedysarum coronarium), which is currently being assessed in eastern and southern Australia for its potential as a pasture and forage legume. Infected plants in the field had extensive rotting of the taproot, lateral roots and crown. Koch's postulates were fulfilled using three inoculation methods. The disease may pose a considerable threat to the potential use of H. coronarium in the dryland, grazing farming systems of Australia, with resistance offering the most viable option for minimising its impact.A P 0 3 0 9 3 R h i z o c t o n i a c r o w n a n d r o o t r o t o f s u l l a M . J . Ry l e y e t a l .

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Relationship of rainfall, cultural practices, soil and plant nutrients, and seedling survival with root disease and parasitic nematode numbers in annual Medicago spp. Pastures

You¹,

Sivasithamparam²,

Riley³

et al. 1999

Aust. J. Agric. Res.

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Surveys were conducted for annual Medicago spp. (medic) pastures in the grain belt of south-west Western Australia during spring 1996 and winter–spring 1997 to determine the relationship of rainfall, cultural practices, soil and plant nutrients, and seedling survival with severity of root disease and numbers of parasitic nematodes. Medic pasture was sampled on 116 farms. Most pastures consisted of a single medic variety, viz. Serena, Santiago, Cyprus, or Caliph, whereas about 33% of sites had mixed varieties. Regression analyses showed that high rainfall and application of phosphorus fertilisers were correlated with increased severity of rot in medic tap roots. Crop history and medic variety were not related to the level of root rot. Numbers of Pratylenchusin medic roots were not correlated with the level of tap or lateral root rot, medic variety, rainfall, or with the application of insecticide, fertilisers, or herbicides. Soil with relatively high levels of P, NO3-, or Fe was associated with an increased level of tap root rot. Soils with high pH were associated with reduced tap root rot. Soils with relatively high K were related to severe lateral root rot, whereas relatively high levels of P in soil were associated with reduced lateral root rot. Plants with high levels of tap root rot showed low levels of Mg, whilst low levels of Ca and NO3– in tissues were related to high levels of lateral root rot. High levels of tap root rot were associated with relatively high levels of total N, K, and S, Cu, Zn, Mn, and NO3- in plant tissues. Plants with relatively high levels of lateral root rot had relatively high levels of Cu in shoots. Of the 116 annual Medicago pastures sampled, only 1% had adequate Mg content and only 19% had adequate Ca content. However, 83% had higher than adequate levels of Cu, 70% had higher than adequate levels of Mn, and all samples showed more than adequate levels of chloride. Experimental sites of M. polymorpha cv. Serena at 6 farms showed that the percentage survival rate of seedlings was negatively correlated with the severity of tap and lateral root rot in the previous year. These results indicate that in the farms surveyed there is a serious threat to annual medic pastures from root rot fungi. The severity of the disease was partly determined by soil conditions and cultural practices.

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Role of root disease in the poor establishment of Medicago pastures after cereal cropping in South Australia

Cited by 11 publications

References 22 publications

Pathogenicity to Potato Tubers of Fusarium spp. Isolated from Potato, Cereal and Forage Crops

Pathogenicity to Potato Tubers of Fusarium spp. Isolated from Potato, Cereal and Forage Crops

Rhizoctonia crown and root rot of the pasture legume, sulla (Hedysarum coronarium)

Relationship of rainfall, cultural practices, soil and plant nutrients, and seedling survival with root disease and parasitic nematode numbers in annual Medicago spp. Pastures

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