Viabilidade de Fusarium graminearum em sementes de trigo durante o armazenamento

Barros, Francisco Xavier de; Neto, Telles; Reis, Erlei Melo; Casa, Ricardo Trezzi; Agrônomo, Engenheiro

doi:10.1590/s0100-54052007000400017

Cited by 11 publications

(6 citation statements)

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“…Telles Neto et al (2007), when evaluating the viability of Fusarium graminearum in wheat seeds during storage, observed a reduction in the contamination, and at 12 months of storage the incidence was 0%; however, in the present study, after 30 days of storage, a reduction in the incidence of this fungus was observed, but the behavior for a longer storage period cannot be affirmed.…”

Section: Resultscontrasting

confidence: 87%

Mortality of insects and quality of maize grains in hermetic and non-hermetic storage

Viebrantz

Radünz

Dionello

2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TDue to the need to improve the quality and safety of foods, chemical methods used to control grain pests have been replaced by alternative methods. For example, modified atmosphere within the storage units has been used. Therefore, the objective was to evaluate maize grain quality and mortality of insects of the species Sitophilus zeamais and Tribolium castaneum in hermetic and non-hermetic environments for 50 days of storage. The hermetic units consisted of polyethylene "bags" with capacity for 60 kg. A cage with 20 adults of each species and 200 g of maize was placed inside each unit. The oxygen level was quantified every five days. Evaluations of insect mortality and survival occurred at 10, 20, 30, 40 and 50 days of storage. At 0, 30 and 50 days, density, moisture and fungal incidence analyses were conducted. The airtight system is efficient in the control of insects, with satisfactory mortality values for both species. Insects favor the development of fungi during the storage, regardless of the storage system.Mortalidade de insetos e qualidade de grãos de milho em armazenamento hermético e não-hermético R E S U M O Devido à necessidade de melhorar a qualidade e a segurança dos alimentos, a utilização de métodos químicos para o controle de pragas de grãos tem sido substituída por métodos alternativos; tem-se, como exemplo, o uso da atmosfera modificada no interior das unidades armazenadoras; portanto, o objetivo do trabalho foi avaliar a qualidade de grãos de milho e a mortalidade de insetos das espécies Sitophilus zeamais e Tribolium castaneum em ambiente hermético e não hermético, durante 50 dias de armazenamento; as unidades herméticas consistiam de "bags" de polietileno com capacidade de 60 kg; no interior de cada unidade foi colocada uma gaiola contendo 20 insetos adultos de cada espécie e 200 g de milho; a cada cinco dias quantificou-se o nível de oxigênio; as avaliações de mortalidade e sobrevivência dos insetos foram realizadas aos 10, 20, 30, 40 e 50 dias de armazenamento; aos 0, 30 e 50 dias foram analisados a massa específica, teor de água e incidência de fungos; o sistema hermético foi eficiente quanto ao controle dos insetos apresentando valores satisfatórios de mortalidade para ambas as espécies; insetos favorecem o desenvolvimento de fungos ao longo do armazenamento, independentemente do sistema de armazenagem.

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Section: Resultscontrasting

confidence: 87%

Mortality of insects and quality of maize grains in hermetic and non-hermetic storage

Viebrantz

Radünz

Dionello

2016

Rev. bras. eng. agríc. ambient.

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“…A similar result of 58.1% reduction in viability was found for Fusarium graminearum Schwabe on wheat seeds after 6 months of storage (Telles Neto et al, 2007). Reis et al (1995) also detected the presence of Pyricularia grisea Cooke (Sacc.)…”

Section: Experiments Ii: the Survival Of A Alternata In Wheat Seedssupporting

confidence: 61%

“…The fungi survive mainly as a mycelium in the endosperm, tegument or embryo of the cereal seeds (Reis and Casa, 1998). During the storage of the infected seeds, fungal viability can be maintained during the inter-harvest period until the next sowing season (Reis et al, 1995;Telles Neto et al, 2007). After sowing, the necrotrophic fungi may grow on the seedling coleoptiles and reach the soil surface.…”

Section: Introductionmentioning

confidence: 99%

Survey, survival and control of Alternaria alternata in wheat seeds

Casa

Kuhnem

Bogo

et al. 2012

Rev. bras. sementes

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-The fungus Alternaria alternata was quantified in 75 wheat seed samples collected from three different regions of southern Brazil for Cropping and Use Value (CUV) I, II and III. Fungal presence was evaluated in two hundred disinfested seeds per sample before sowing in a potato-dextrose-agar medium + antibiotic (PDA+A). Fungus survival was evaluated every 45 days for 180 days for three seed batches from six wheat cultivars stored in propylene bags in a storehouse, with air temperature varying between 18 to 22 °C and relative air humidity around 60%. The efficacy of carboxin+thiram, difenoconazol, thiram, triadimenol, triticonazol and triticonazol + iprodione fungicides to control A. alternata was determined. A. alternata was detected in all the samples with an incidences of 39.6 %, 38.8% and 35.9% for the CUV I, CUV II and CUV III regions, respectively. The highest mean incidence of the fungus was found in the CUV I region, the coolest and most humid, and was significantly different from the other two regions. The average reduction in A. alternata viability in the wheat cultivar seeds was 49.5% during the 180 days of storage (inter-harvest period), demonstrating that infected seeds are the primary inoculum source for the fungus. The triticonazol + iprodione fungicide mixture efficiently controls A. alternata.

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“…Por ter incidência inicial baixa e ser um fungo proveniente de campo a incidência desse patógeno chegou a 0% aos dois meses de armazenamento. Estes resultados são semelhantes aos apresentados por TELLES NETO et al (2007) que relataram a queda na incidência do inóculo deste fungo de 100 a 0% em 11 meses de armazenamento.…”

Section: Loteunclassified

Análise Sanitária De Sementes De Trigo Durante O Armazenamento

2015

Enciclopédia Biosfera

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RESUMOAs sementes de trigo podem ser infestadas e/ou infectadas por microrganismos que podem causar a deterioração desta estrutura de propagação. Objetivou-se avaliar a qualidade sanitária de sementes de trigo durante seis meses de armazenamento. Foram utilizados cinco lotes de sementes de trigo (Triticum aestivum L.), cultivar TBIO Pioneiro sem tratamento. As sementes foram armazenadas por seis meses em câmara fria. Foi determinado o teor de água e realizados testes de germinação e incubação em substrato de papel em quatro épocas de armazenamento (0, 2, 4 e 6 meses). O delineamento experimental foi inteiramente casualizado, utilizando-se quatro repetições para cada lote. O lote 4 diferenciou-se dos demais no teor inicial de água e o percentual inicial de germinação. A viabilidade das sementes não foi afetada durante período avaliado. Foram detectados seis gêneros fúngicos nas sementes de trigo, são eles: Alternaria sp., Bipolaris sp., Fusarium sp., Aspergillus sp,. Penicillium sp. e Rhizopus sp. Os fungos Alternaria sp., Bipolaris e Fusarium sp., perdem viabilidade durante o armazenamento enquanto Aspergillus sp. e Pencillium sp. apresentam maior percentual de incidência ao longo do período de armazenamento. PALAVRAS-CHAVE: patógenos, sanidade de sementes, Triticum aestivum L., HEALTH ANALYSIS OF SEEDS OF WHEAT DURING STORAGE ABSTRACTWheat seeds may be contaminated and / or infected by microorganisms that can cause seed deterioration. The aim of this study was to evaluate the health quality of wheat seeds during six months of storage. Five lots of wheat (Triticum aestivum L.) seeds untreated of cv. TBIO Pioneiro were used. The seeds were stored for six months in cold chamber. It was determined the seed moisture content and conducted standard germination test and blotter test into four periods of storage (0, 2, 4 and 6 months). The experimental design was completely randomized, using four

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Viabilidade de Fusarium graminearum em sementes de trigo durante o armazenamento

Cited by 11 publications

References 1 publication

Mortality of insects and quality of maize grains in hermetic and non-hermetic storage

Mortality of insects and quality of maize grains in hermetic and non-hermetic storage

Survey, survival and control of Alternaria alternata in wheat seeds

Análise Sanitária De Sementes De Trigo Durante O Armazenamento

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