Survival and Germination of Fungal Sclerotia

Coley-Smith, and J R; Cooke, R.C.

doi:10.1146/annurev.py.09.090171.000433

Cited by 352 publications

(148 citation statements)

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“…The penetration and subsequent colonization by antagonists on the sclerotia of many pathogens obviously reflect much upon their parasitic ability rather than saprophytic attributes in the intensely competitive microbiotic environment in soil. Sclerotium rolfsii is well known to produce sclerotia, the principal structure as the means of survival propagules under adverse environmental condition, sclerotia are known to survive for several years in soil (Coley Smith and Cook, 1971) and how they behave so has been a subject of research to find new methods of biological control. They are commonly thought to be resistant to desiccation and this resistance is usually attributed to the presence of rind (Cook and Al-Hamdani, 1986).…”

Section: Isolatesmentioning

confidence: 99%

Variability in parasitic ability of Trichoderma isolates against sclerotia of Sclerotium rolfsii associated with chickpea

Nagamani

Bhagat²,

Biswas

et al. 2018

Journal of Biological Control

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Section: Isolatesmentioning

confidence: 99%

Variability in parasitic ability of Trichoderma isolates against sclerotia of Sclerotium rolfsii associated with chickpea

Nagamani

Bhagat²,

Biswas

et al. 2018

Journal of Biological Control

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“…in soil has been reported to be as short as a few weeks to as long as 8 years or more (Moore, 1949) and it is difficult to measure in the field even in the absence of susceptible hosts because the "primary" sclerotia produce "secondary" or "daughter" sclerotia in the absence of suitable substrates for colonization (Adams and Ayers, 1979;Coley-Smith and Cooke, 1971). This not only causes an increase in the number of sclerotia, but it also extends their viability (Coley-Smith and Cooke, 1971;Kruger, 1975;Willetts and Wong, 1980). Imolehinet al, (1980) reported that the increased mortality of sclerotia at deeper soil is mainly due to the colonization of sclerotia by antagonistic fungi.…”

Section: Effect Of Different Temperature Regimes On Viability Of Sclementioning

confidence: 99%

Carpogenic Germination and Viability Studies of Sclerotia of Sclerotinia sclerotiorum Causing Lettuce Drop

Gupta¹,

Singh²

2017

Int.J.Curr.Microbiol.App.Sci

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“…Além disso, essa palhada impediu que a parte aérea das plantas entrasse em contado com o solo contaminado. É possível ainda que a palhada tenha mantido um nível de umidade e temperatura mais constante na superfície do solo, permitindo o desenvolvimento de outros microrganismos que poderiam atuar antagônicamente sobre o patógeno (Coley-Smith & Cooke, 1971;Ferraz et al, 1999), seja pelo ataque direto dos escleródios ou do micélio, ou até pela produção de substâncias inibidoras. Este conjunto de fatores explicaria a menor quantidade de doença observada no sistema de plantio direto em relação ao plantio convencional, mesmo com uma população elevada de plantas.…”

Section: Plantio Convencionalunclassified

Intensidade do mofo-branco do feijoeiro em plantio convencional e direto sob diferentes lâminas d'água

et al. 2005

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RESUMOUtilizando-se de um gradiente de lâminas d'água obtidas com o sistema de irrigação por aspersão em linha "line source" e duas cultivares de feijoeiro (Phaseolus vulgaris), sob os sistemas de plantio direto e convencional, verificou-se aumento da intensidade do mofo-branco causado por Sclerotinia sclerotiorum e da produção de escleródios com o incremento da lâmina d'água. Com inóculo inicial de 0,2 escleródio/kg de solo a porcentagem de plantas infetadas variou de 0 a 100% em 1998 e de 0 a 12% em 1999. Maior severidade e incidência do mofo-branco ocorreram na cultivar de porte prostrado, em cultivo convencional. Em ambos os anos, a intensidade da doença, a produção de escleródios e a formação de apotécios foram menores no sistema de plantio direto do que no convencional. Finalmente, em ambos os experimentos foi detectado cerca de quatro vezes mais escleródios no resíduo da trilhadora no plantio convencional que no plantio direto, mostrando que a produção de inóculo para as safras subseqüentes no plantio convencional é muito maior que no direto. Este é um fato relevante, considerando-se a importância do inóculo inicial para as doenças monocíclicas, como é o caso do mofo-branco do feijoeiro, e tem implicações diretas na sustentabilidade do sistema de produção irrigado de inverno.Palavras-chave adicionais: Sclerotinia sclerotiorum, produção de escleródios, germinação carpogênica. ABSTRACT Intensity of white mold of beans in conventional tillage and no-tillage cropping systems under variable water depthsA gradient of water depths, obtained with the line source irrigation system, and two bean (Phaseolus vulgaris) cultivars, under the conventional and the no-tillage cropping systems, demonstrated increases in white mold intensity caused by Sclerotinia sclerotiorum and sclerotium production with larger water depths. With an initial inoculum concentration of 0.2 sclerotia/kg of soil, the percentage of infected plants varied from 0 to 100% (1998) and from 0 to 12% (1999). A higher and more severe incidence of white mold was verified in plots planted with the cultivar of more prostrate habit, in the conventional cropping system. In both years, disease intensity, production of sclerotia and development of apothecia were lower in the no-tillage cropping system. Finally, in both experiments, about four times more sclerotia was present in the residue of grain collected from conventional tillage plots, than in the no-tillage plots, showing that the production of inoculum for the next crop is much larger in the former than in the latter. This is especially relevant, considering the importance of initial inoculum for monocyclic diseases, such as in the case of white mold, with direct implications for the sustainability of winter bean production in the dry season in Brazil.

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Survival and Germination of Fungal Sclerotia

Cited by 352 publications

References 0 publications

Variability in parasitic ability of Trichoderma isolates against sclerotia of Sclerotium rolfsii associated with chickpea

Variability in parasitic ability of Trichoderma isolates against sclerotia of Sclerotium rolfsii associated with chickpea

Carpogenic Germination and Viability Studies of Sclerotia of Sclerotinia sclerotiorum Causing Lettuce Drop

Intensidade do mofo-branco do feijoeiro em plantio convencional e direto sob diferentes lâminas d'água

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