A temperature-type model for describing the relationship between fungal growth and water activity

Sautour, Marc; Dantigny, Philippe; Diviès, Charles; Bensoussan, Maurice

doi:10.1016/s0168-1605(01)00471-8

Cited by 98 publications

(59 citation statements)

References 28 publications

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“…(2)) offer good accuracy and predict even the slowest growth observed in our experiments. Beside secondary models used here to predict the growth of grey mould under 'in vitro' conditions, literature describes other models such as the linear Arrhenius-Davey equation (Davey, 1989) and the cardinal modelling approach (Dantigny, 1998;Sautour et al, 2001Sautour et al, , 2002. These models could also be applied in the same way to predict the radial growth of B. cinerea.…”

Section: Resultsmentioning

confidence: 99%

Predictive modelling of temperature and water activity (solutes) on the in vitro radial growth of Botrytis cinerea Pers

Lahlali

Serrhini

Friel

et al. 2007

International Journal of Food Microbiology

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The objective of this work was to develop validated models predicting the 'in vitro' effect of a w and temperature on the radial growth of Botrytis cinerea. The growth rate (g, mm d− 1 ) of B. cinerea was calculated at three incubation temperatures (25°C, 15°C, 5°C) and six water activities (ranging from 0.995 to 0.890). The water activity was adjusted with glucose, NaCl, glycerol, or sorbitol. Statistical analysis showed a significant effect of temperature, solute, a w , and their two-and three-way interactions on the growth rate. No growth was observed at a w = 0.93 in the presence of NaCl or at 0.89 in the presence of a non-ionic solute. The maximum colony growth rate decreased when the incubation temperature and water activity was lowered. Secondary models, relating the colony growth rate with a w or a w and temperature were developed. Optimum a w values for growth ranged from 0.981 to 0.987 in glycerol-, sorbitol-, or glucose-modified medium and were close to 1 in NaClmodified medium. A quadratic polynomial equation was used to describe the combined effects of temperature and a w on g (mm d − 1 ) in the presence of each solute. The highest and lowest radial growth rates were observed in models based on glucose and NaCl respectively, whatever the incubation temperature. All models prove to be good predictors of the growth rates of B. cinerea within the limits of experiments. The quadratic polynomial equation has bias factors of 0.957, 1.036, 0.950, and 0.860 and accuracy factors of 1.089, 1.070, 1.120 and 1.260 in media supplemented with glucose, NaCl, glycerol and sorbitol respectively. The results from modelling confirm the general finding that a w has a greater influence on fungal growth than temperature.

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Section: Resultsmentioning

confidence: 99%

Predictive modelling of temperature and water activity (solutes) on the in vitro radial growth of Botrytis cinerea Pers

Lahlali

Serrhini

Friel

et al. 2007

International Journal of Food Microbiology

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“…Previous studies have demonstrated that growth of moulds may occur in a wide range of RH when A w of the product ranges between 0.81 and 0.99. In these conditions mould growth depends on other variables like pH, atmosphere, solute concentrations or mould species studied (García, Ramos, Sanchis, & Marín, 2011;Gibson, Baranyi, Pitt, Eyles, & Roberts, 1994;Sautour, Dantigny, Divies, & Bensoussan, 2001). It is also assumed at lower RH in dry-cured ham Aspergillus species grow better than those of Penicillium (Comi, Orlic, Redzepovic, Urso, & Iacumin, 2004;Nuñez et al, 1996).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of hazard of aflatoxin B1, ochratoxin A and patulin production in dry-cured ham and early detection of producing moulds by qPCR

et al. 2012

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“…Diversos modelos apontam que a duração do molhamento foliar, associado à temperatura, atua como fator fundamental para o processo de eficiência da infecção de doenças, como o míldio da videira (LALANCETE et al, 1987). Com água livre disponível, vários processos relacionados às infecções das doenças, incluindo a liberação e a germinação de esporos, penetração do tubo germinativo de fungos e a multiplicação de células de fitobactérias, ficam apenas dependentes da temperatura para seu estabelecimento (SAUTOUR et al, 2001). Deste modo, considerando que na área coberta o fator água não está presente, as condições de infecção das doenças fúngicas são dificultadas.…”

Section: Incidência De Doenças Fúngicas E Necessidade De Controleunclassified

Cultivo protegido de videira: manejo fitossanitário, qualidade enológica e impacto ambiental

Chavarria

Santos

2013

Rev. Bras. Frutic.

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RESUMO -O cultivo protegido na cultura da videira apresenta-se como uma alternativa na diminuição da incidência de doenças fúngicas em regiões que apresentam excesso de chuvas. A utilização de cobertura plástica sobre as linhas de cultivo da videira ocasiona modificações no microclima ao redor da planta, principalmente pela ausência de água livre sobre folhas e frutos. Estas alterações propiciam condições desfavoráveis ao desenvolvimento de doenças fúngicas, com a menor necessidade do uso de fungicidas, como as podridões de cachos, que atualmente são um dos maiores problemas no controle fitossanitário, em regiões produtoras tradicionais, como a Serra Gaúcha. Todavia, o oídio da videira que outrora não apresentava incidência em condições de alta umidade relativa, em condições de cultivo protegido, deve ser monitorado. Outro aspecto que merece cautela é o uso de fungicidas, pois destaca-se que, pela redução de radiação ultravioleta e ausência de chuvas sobre os cachos, devido ao uso da cobertura plástica, o período residual dos fungicidas é prolongado. Este maior acúmulo é preocupante, tanto nas uvas destinadas ao consumo in natura, que afeta diretamente o consumidor, quanto às destinadas à vinificação, que prejudica a atuação das leveduras na fermentação dos vinhos. De forma geral, a tecnologia de cobrimento dos vinhedos é eficaz no controle de doenças fúngicas e na redução do uso de fungicidas, contudo deve ser considerada como um novo sistema de produção, principalmente por exigir um manejo fitossanitário distinto em relação ao cultivo convencional. Os plásticos de cobertura, usados, devem ser considerados resíduo agrícola, exigindo cuidados específicos para que seja evitada contaminação ambiental. Termos para indexação: plasticultura, videira, água livre, doenças fúngicas, resíduos. PROTECTED CULTIVATION OF GRAPEVINE: DISEASE MANAGEMENT, ENOLOGICAL QUALITY, AND ENVIRONMENTAL IMPACTABSTRACT -The protected cultivation of grapes is an alternative to reduce the incidence of fungal diseases in regions with excess rainfall. The use of plastic covering on vine planting rows produces changes in the microclimate around the plant, due mainly to the absence of freely available water on leaves and berries. These changes hinder the development of fungal diseases, such as bunch rot -currently one of the biggest challenges in disease control in traditional grape growing regions like Serra Gaúcha -and reduce fungicide use. However, powdery mildew, whose incidence under high relative humidity conditions is usually low, must be closely monitored in protected cultivation. Also, fungicides must be used with caution as plastic covering reduces the incidence of ultraviolet radiation and rainfall on clusters, thereby increasing the residual effect of fungicides. The higher accumulation of fungicide on grapes directly affects their in natura consumption and compromises yeast fermentation during the winemaking process. In general, plastic covering is efficient in controlling fungal diseases and in reducing fungicide use, but it must b...

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A temperature-type model for describing the relationship between fungal growth and water activity

Cited by 98 publications

References 28 publications

Predictive modelling of temperature and water activity (solutes) on the in vitro radial growth of Botrytis cinerea Pers

Predictive modelling of temperature and water activity (solutes) on the in vitro radial growth of Botrytis cinerea Pers

Evaluation of hazard of aflatoxin B1, ochratoxin A and patulin production in dry-cured ham and early detection of producing moulds by qPCR

Cultivo protegido de videira: manejo fitossanitário, qualidade enológica e impacto ambiental

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