Inactivation of conidia of Botrytis cinerea and Monilinia fructigena using UV-C and heat treatment

Marquenie, David; Lammertyn, Jeroen; Soontjens, Carine; Impe, Jan Van; Nicolaı̈, Bart; Michiels, Chris W.

doi:10.1016/s0168-1605(01)00719-x

Cited by 97 publications

(54 citation statements)

References 16 publications

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“…Stevens et al (1996; observed the useful effects of UV-C irradiation against fungal pathogens causing rot in various fruit species. Marquenie et al (2002) applied UV-C and heat treatment, and found that Monilinia fructigena reacted more sensitively to these treatments than Botrytis cinerea. Brown et al (2001) treated cabbage seeds with low dose UV-C radiation against the black-vein disease of cabbage species (Xanthomonas campestris pv.…”

Section: Introductionmentioning

confidence: 99%

Effect of low dose UV-C radiation on the germination rate and fungal contamination of tall fescue ( Festuca arundinacea schreb.) seeds

Varga

Nagy

2008

Acta Agronomica Hungarica

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The effects of UV-C radiation on the germination rate and fungal contamination of tall fescue seeds were investigated. Samples from the same seed lot were irradiated in two different ways in two consecutive years. The seeds were irradiated with a Hg vapour lamp using different doses. In the first trial one side of the seeds was irradiated, while in the second trial a mirror was used to irradiate the whole seed surface. The results showed that various doses of UV-C irradiation had an effect on the germination rate, but there were no significant differences in germination percentage between the treatments. Differences in fungal contamination rates were observed when the seeds were irradiated on all sides. The presence of 21 fungal genera was identified on the seeds, the saprotrophic fungi Alternaria, Rhizopus and Penicillium being dominant.

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Section: Introductionmentioning

confidence: 99%

Effect of low dose UV-C radiation on the germination rate and fungal contamination of tall fescue ( Festuca arundinacea schreb.) seeds

Varga

Nagy

2008

Acta Agronomica Hungarica

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“…Para as temperaturas de 50 e 55 o C, independentemente do tempo de exposição, a sobrevivência foi ainda mais reduzida, com o controle superior a 99%. Resultados semelhantes foram obtidos por Marquenie et al (2002), que observaram maior inativação dos conídios de B. cinerea e Monilinia fructigena com o aumento na temperatura e a duração do tratamento. Conforme Oster (2004), a sobrevivência de conídios de B. dothidea foi inibida na temperatura de 58 o C durante 60 s. A maior sensibilidade de conídios de C. perennans ao calor, em comparação a B. dothidea, pode estar relacionada às diferenças nas características genéticas entre esses dois patógenos ou ao maior tamanho dos conídios de B. dothidea (5-8x15-29 μm) em relação aos de C. perennans (1-2x5-8 μm) (Bogo et al, 2008).…”

Section: Resultsunclassified

“…Conforme Oster (2004), a sobrevivência de conídios de B. dothidea foi inibida na temperatura de 58 o C durante 60 s. A maior sensibilidade de conídios de C. perennans ao calor, em comparação a B. dothidea, pode estar relacionada às diferenças nas características genéticas entre esses dois patógenos ou ao maior tamanho dos conídios de B. dothidea (5-8x15-29 μm) em relação aos de C. perennans (1-2x5-8 μm) (Bogo et al, 2008). Fato semelhante foi observado por Marquenie et al (2002), que concluíram que os conídios de M. fructigena foram mais sensíveis ao calor do que os de B. cinerea.…”

Section: Resultsunclassified

“…Uma suspensão de 3 mL, com 5x10 2 conídios mL -1 do patógeno em placas de Petri esterilizadas (6 cm de diâmetro), foi submetida às doses de radiação UV-C 0,018, 0,037, 0,075 e 0,150 kJ m -2 , no primeiro experimento, e 0,375, 0,750, 1,500 e 3,000 kJ m -2 , no segundo. Em ambos os experimentos, o tratamento testemunha não recebeu radiação UV-C. As doses de radiação UV-C foram definidas de acordo com os trabalhos de Moy (1983) e Marquenie et al (2002). Após cada tratamento, alíquotas de 0,1 mL de cada placa foram transferidas para placas com BDA acidificado (pH 4,5 ajustado com ácido lático a 85%) e incubadas a 22 o C por sete dias, sob luz fluorescente contínua (luz do dia).…”

Section: Methodsunclassified

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Água aquecida e radiação UV-C no controle pós-colheita de Cryptosporiopsis perennans em maçãs

Bartnicki

Valdebenito‐Sanhueza

Amarante

et al. 2010

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar a colonização de Cryptosporiopsis perennans na epiderme de maçãs e a eficiência da aplicação de água aquecida e radiação UV-C no controle desse patógeno. Em maçãs submetidas à inoculação de C. perennans, a colonização de lenticelas e das áreas adjacentes pelo patógeno foi avaliada por microscopia eletrônica de varredura. A sensibilidade dos conídios de C. perennans aos tratamentos foi avaliada em suspensão aquosa, às temperaturas de 28, 45, 50 e 55 o C, por 15 e 30 s, e às doses de radiação UV-C de 0, 018, 0,037, 0,075, 0,150, 0,375, 0,750, 1,500 e 3,000 kJ m -2 . Em maçãs submetidas à inoculação de C. perennans, foram avaliados os efeitos de 0,375, 0,750 e 1,500 kJ m -2 de radiação UV-C e da aspersão de água aquecida à 50 o C, por 15 e 30 s no controle do patógeno. O fungo produziu abundante micélio e conídios nas lenticelas e nas áreas adjacentes, na epiderme das maçãs. A água aquecida a 50 o C por 15 s e à dose de radiação de UV-C de 0,750 kJ m -2 reduzem em mais de 99% a sobrevivência de conídios. A aspersão de água aquecida a 50 o C por 15 s e à dose de radiação de UV-C de 0,375 kJ m -2 , controlam C. perennans em maçãs.Termos para indexação: Malus domestica, desinfestação, podridão-olho-de-boi, pós-colheita, radiação UV-C, tratamento térmico. Heated water and UV-C radiation to postharvest control of Cryptosporiopsis perennans on applesAbstract -The objective of this work was to assess the colonization of Cryptosporiopsis perennans in the epidermis of apples and the efficiency of heated water and UV-C radiation application to control this pathogen.In apples inoculated with C. perennans, the colonization of lenticels and adjacent areas by the pathogen was observed by electronic scanning microscopy. The sensitivity of C. perennans conidia was evaluated in aqueous suspension, at temperatures of 28, 45, 50 and 55 o C for 15 and 30 s, and at UV-C radiation doses of 0. 018, 0.037, 0.075, 0.150, 0.375, 0.750, 1.500 and 3.000 kJ m -2 . The effects of UV-C radiation doses at 0.375, 0.750 and 1.500 kJ m -2 and heated water at 50 o C, sprayed during 15 and 30 s were evaluated for controlling C. perennans in apples inoculated with the pathogen. The fungus produced abundant mycelium and conidia in lenticels and adjacent areas on the epidermis of the apples. The heated water at 50 o C during 15 s and a 0.750 kJ m -2 UV-C radiation dose reduced conidia survival in more than 99%. Heated water sprayed at 50 o C during 15 s and a UV-C radiation dose of 0.375 kJ m -2 control C. perennans in apples.

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“…In addition, some researchers have examined extending the shelf life of fresh fruits by combining UV irradiation with thermal technologies (Marquenie et al, 2002a;Pan et al, 2004). The combined effect of UV-C irradiation and heat on the inactivation of spores of Botrytis cinerea and Monilinia fructigena, which are the major contaminants of strawberries and cherry fruits, have been investigated in vitro (Marquenie et al, 2002b). This combination reduced the intensity of UV irradiation required to inactivate both molds.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Heat Treatments on Bacillus subtilis Spores Inactivated by Ultraviolet Irradiation

Hamanaka

Yamada

Trivittayasil

et al. 2011

FSTR

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The influence of a combination of ultraviolet (UV) irradiation with infrared radiation heating (IRH) and conductive heating (CH) on the inactivation of bacterial spores (Bacillus subtilis) was investigated at 20, 30, 40, and 50℃ on the surface of agar plates. The survival curves of B. subtilis spores were convex downward. Generally, the inactivation efficiency of UV irradiation with IRH was greater than that with CH for B. subtilis spores. A 4.1 log reduction of B. subtilis spores was obtained by 60 sec of UV irradiation with IRH at 50℃. The highest decimal reduction time was obtained at around 30℃ of IRH. These variations in the inactivation characteristics of UV irradiation might be caused by differences in the UV and IR absorption characteristics of spores exposed at different temperatures.

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Inactivation of conidia of Botrytis cinerea and Monilinia fructigena using UV-C and heat treatment

Cited by 97 publications

References 16 publications

Effect of low dose UV-C radiation on the germination rate and fungal contamination of tall fescue ( Festuca arundinacea schreb.) seeds

Effect of low dose UV-C radiation on the germination rate and fungal contamination of tall fescue ( Festuca arundinacea schreb.) seeds

Água aquecida e radiação UV-C no controle pós-colheita de Cryptosporiopsis perennans em maçãs

Effect of Different Heat Treatments on Bacillus subtilis Spores Inactivated by Ultraviolet Irradiation

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