Incidência fúngica e contaminações por micotoxinas em grãos de híbridos comerciais de milho em função da umidade de colheita

Marques, Odair José; Filho, Pedro Soares Vidigal; Dalpasquale, Valdecir Antoninho; Scapim, Carlos Alberto; Pricinotto, Luiz Fernando; Júnior, Miguel Machinski

doi:10.4025/actasciagron.v31i4.5690

Cited by 16 publications

(20 citation statements)

References 7 publications

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“…was the most abundant in corn samples in summer storage, which was verified by Dilkin et al (2000) and Marques et al (2009) high occurrence of Aspergillus sp. and aflatoxins in the corn samples in this study contradicted the hypothesis presented in previous research (Hirooka et al, 2007;Mohale et al, 2013;Rocha et al, 2009).…”

Section: Resultsmentioning

confidence: 89%

“…Moreover, Marques et al (2009) verified differences in the incidence of Aspergillus sp. and the occurrence of aflatoxins in crops cultivated in Astorga, north of Paraná.…”

Section: Resultsmentioning

confidence: 99%

“…was verified from the harvest in kernel samples as well as in corncobs, the aflatoxin contamination was detected after the drying of the kernel samples. Marques et al (2009), in a study on aflatoxin contamination of corn kernels in the field, found that weather conditions at harvest might favor the development of aflatoxins and also that the density of plants can create a microclimate adequate for the development of Aspergillus. 3 2B688RR ---------------nd nd Nd 2,99 2,99 2B688RR nd 14,5 nd nd 14,5 ---------------6 2B688RR ----------nd 9,1 nd 3,2 12,3 -----30K73Hx 0,49 11,8 nd nd 12,3 ---------------2B688RR nd 9,3 nd 3,5 12,8 nd 9,1 nd Nd 9,1 --…”

Section: Resultsmentioning

confidence: 99%

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Occurrence of Aspergillus sp., Fusarium sp., and aflatoxins in corn hybrids with different systems of storage

et al. 2016

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ABSTRACT. The aim of this study was to assess alternatives for viable corn storage for small rural properties in two annual storage experiments. A 4×5 factorial design was used with four types of storage (conventional bags, hermetic bags, metal silos and corncobs) and five periods of storage (0, 3, 6, 9 and 12 months). We used corn hybrids 2B688RR and 30K73Hx cultivated in winter 2012 and summer 2012/2013 in the city of Dois Vizinhos, Paraná, Brazil. The moisture contents, counts of Aspergillus sp. and Fusarium sp., and the occurrence of aflatoxins (B 1 , B 2 , G 1 and G 2 ) were assessed. The kernels stored in hermetic bags had lower moisture contents. Aspergillus sp. and Fusarium sp. were observed in 20.37 and 86.11% of winter storage samples, respectively, and in 83.3 and 91.6% of summer storage samples, respectively. The storage system and time of storage had no influence on the occurrence of Aspergillus sp. and aflatoxins in the winter crop samples. The corncobs from the summer crop samples had the lowest counts of Aspergillus sp. and did not have aflatoxins. We detected aflatoxins at concentrations of 2.8-14.5 and 3-197.5 μg kg -1 in the winter and summer crop samples, respectively.

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Section: Resultsmentioning

confidence: 89%

“…Moreover, Marques et al (2009) verified differences in the incidence of Aspergillus sp. and the occurrence of aflatoxins in crops cultivated in Astorga, north of Paraná.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Occurrence of Aspergillus sp., Fusarium sp., and aflatoxins in corn hybrids with different systems of storage

et al. 2016

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“…Por ser rico em amido, o milho é um dos cereais mais vulneráveis ao desenvolvimento de fungos e à contaminação por micotoxinas, metabólitos secundários tóxicos produzidos por fungos filamentosos, principalmente os dos gêneros Aspergillus, Penicillium e Fusarium (Marín et al, 1998a;Marques et al, 2009). A contaminação pode ocorrer no campo ou durante armazenagem ou, ainda, após o processamento (Ono et al, 2006).…”

Section: Introductionunclassified

Análise de trilha da contaminação por aflatoxinas em grãos de milho armazenados

Domênico

Danner

Busso

et al. 2015

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi determinar a magnitude dos efeitos diretos e indiretos de parâmetros físico-químicos e microbiológicos sobre a ocorrência de aflatoxinas em grãos de milho armazenados, por meio da análise de trilha. Os dados foram coletados em dois experimentos: um cultivo de inverno (colheita do milho em julho de 2012) e um cultivo de verão (colheita em fevereiro de 2013). Os grãos foram armazenados por 12 meses, em dois tipos de acondicionamentos: em sacarias convencionais de polipropileno e a granel em silo metálico. Avaliaram-se 14 características dos grãos. Calculou-se a matriz de correlações de Pearson entre todos os parâmetros, realizou-se o diagnóstico de multicolinearidade e, posteriormente, aplicou-se a análise de trilha com regressão em crista. Observou-se forte influência das condições ambientais entre as safras de inverno e de verão, e entre época e tipo de armazenagem, nos coeficientes de análise de trilha. As variáveis teor de umidade, conteúdo de cinzas, proteínas, lipídios, grãos sem defeitos, massa volumétrica, incidência de Penicillium sp., Aspergillus sp. e Fusarium sp. devem ser consideradas conjuntamente na definição da possibilidade de ocorrência de aflatoxinas na massa de grãos armazenados.Termos para indexação: Zea mays, armazenagem, micotoxinas, multicolinearidade. Path analysis of aflatoxin contamination on stored maize kernelsAbstract -The objective of this work was to determine the magnitude of the direct and indirect effects of the physicochemical and microbiological parameters on the occurrence of aflatoxins on stored maize kernels, through path analysis. Data were collected in two experiments: one winter crop (maize harvest in July 2012) and one summer crop (harvest in February 2013). Grains were stored for 12 months in two types of packaging: in conventional polypropylene sacks and bulk storage in metallic silo. Fourteen grain characteristics were evaluated. The matrix of Pearson's correlations was calculated between all parameters, the diagnosis of multicollinearity was performed, and subsequently path analysis was applied with ridge regression. A strong influence of environmental conditions was observed between winter and summer crops, and between season and type of storage, in path analysis coefficients. The variables moisture content, ash, proteins, lipids, undamaged kernels, volumetric weight, incidence of Penicillium sp., Aspergillus sp., and Fusarium sp. should be considered together for defining the probability of aflatoxin occurrence in the bulk of stored kernels.

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“…Harvest delay is the major responsible for the increase in rotten grains and mycotoxin content derived from the presence of Aspergillus, Penicillium and Fusarium (Marques et al, 2009). Such fungi use endosperm storage compounds as energy source for their growth and development (Alakonya et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Harvest time, stem and grain sensibility of maize hybrids with contrasting growth cycles

Panison¹,

Sangoi²,

Casa³

et al. 2016

Afr. J. Agric. Res.

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The delay of maize harvest may affect the stem and grain sanity. This work was carried out aiming to evaluate the effects of harvest time on the incidence of stem rots and rotten grains of maize hybrids with contrasting growth cycles. The experiment was set in Lages, SC, during the 2012/2013 and 2013/2014 growing seasons. A randomized block design, disposed in split plots was used. Five singlecross hybrids were tested in the main plots: P1630H and P32R22H (hipper early cycle), P2530 (super early cycle) and P30F53YH and P30R50YH (early cycle). Five harvest times were assessed in the split plots: 0 (grain physiological maturity), 10, 20, 30 and 40 days after physiological maturity. The incidence of stem rots increased proportionally to the delay in harvest time, regardless of hybrid growth cycle. More than 60% of the stems presented rot symptoms when harvest was performed 30 and 40 days after physiological maturity. Such behavior enhanced the percentage of lodged and broken stems when harvest was postponed. Harvest time did not affect the percentage of rotten grains, which was higher for hybrid P32R22H due to its poor ear husk coverage. Harvest delay affected more significantly the stem than grain sanity of maize hybrids.

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Incidência fúngica e contaminações por micotoxinas em grãos de híbridos comerciais de milho em função da umidade de colheita

Cited by 16 publications

References 7 publications

<b>Occurrence of <i>Aspergillus</i> sp., <i>Fusarium</i> sp., and aflatoxins in corn hybrids with different systems of storage

<b>Occurrence of <i>Aspergillus</i> sp., <i>Fusarium</i> sp., and aflatoxins in corn hybrids with different systems of storage

Análise de trilha da contaminação por aflatoxinas em grãos de milho armazenados

Harvest time, stem and grain sensibility of maize hybrids with contrasting growth cycles

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