Efeito da colhedora, velocidade e ponto de coleta na contaminação de sementes de soja por fungos

Gomes, Delineide Pereira; Kronka, Adriana Zanin; Barrozo, Leandra Matos; Silva, Rouverson Pereira da; Souza, A. L. F. de; Silva, Breno M. S. e; Panizzi, Rita de Cássia

doi:10.1590/s0101-31222009000300018

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…Some fungi, such as Cladosporium sp., are favored by mechanical damages to the seeds, as observed in soybean by Gomes et al (2009). In the processing, the successive impacts and falls in the deposits of the machines cause injuries; therefore, these damages are cumulative and favor the access of microorganisms to the inside of the seeds (Carvalho & Nakagawa, 2012).…”

Section: Resultsmentioning

confidence: 99%

Processing on the sanitary quality of seeds of Panicum maximum cv. ‘Tanzânia’

Melo

Silva

Panizzi

et al. 2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe aim of this study was to evaluate the sanitary quality of seeds of Panicum maximum cv. 'Tanzânia' , following the several phases of the seed processing process. Seeds were sampled before processing and after leaving the air and screen machine (upper and intermediary screens and bottom); first gravity table (drift, upper and intermediate spouts); second gravity table (upper, intermediate, and lower spouts), and treating machine for dyeing the seeds. The sanitary analyses were conducted according to the filter paper method, with and without superficial disinfestation of the seeds, which were incubated at a temperature of 20 ± 2 °C with photoperiod of 12 h for seven days. Some seed processing steps may reduce the incidence of seeds of P. maximum cv. 'Tanzania' contaminated with Phoma sp. and Helminthosporium sp. In general, the processing can increase the incidence of seeds contaminated with Cladosporium sp. and Cercospora sp. The fungi Phoma sp., Helminthosporium sp., Penicillium sp., Cladosporium sp. and Cercospora sp. are found inside and outside the seeds and can be disseminated by the processing machines.Beneficiamento na qualidade sanitária de sementes de Panicum maximum cv. Tanzânia R E S U M OObjetivou-se, neste trabalho, avaliar a qualidade sanitária de sementes de Panicum maximum cv. Tanzânia durante as etapas de beneficiamento. As sementes foram amostradas antes do processamento e após a saída da máquina de ventilador e peneiras (descarga das peneiras superior, intermediária e fundo), primeira mesa gravitacional (deriva, descarga superior e intermediária), mesa gravitacional (descarga superior, intermediária e inferior) e máquina tratadora para tingimento das sementes. A análise sanitária foi realizada pelo método do papel de filtro com e sem desinfestação superficial das sementes, as quais foram incubadas a 20 ± 2 °C, com fotoperíodo de 12 h durante sete dias. Algumas etapas de beneficiamento podem reduzir a porcentagem de sementes de P. maximum cv. Tanzânia contaminadas com Phoma sp. e Helminthosporium sp. Em geral, o beneficiamento pode aumentar a porcentagem de sementes com Cladosporium sp. e Cercospora sp. Os fungos Phoma sp., Helminthosporium sp., Penicillium sp., Cladosporium sp. e Cercospora sp. se encontram alojados nas sementes interna e externamente e podem ser disseminados pelas máquinas de beneficiamento.

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Section: Resultsmentioning

confidence: 99%

Processing on the sanitary quality of seeds of Panicum maximum cv. ‘Tanzânia’

Melo

Silva

Panizzi

et al. 2017

Rev. bras. eng. agríc. ambient.

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“…In assessing health quality of soybean seeds, the fungus Epicoccum spp. has not been listed among the most frequent pathogens (Costa et al, 2003;Gomes et al, 2009;Minuzzi et al, 2010). It is possible that in studies on seed pathology its low incidence or the lack on its detection in soybean seeds is due to the possibility of this fungus to be mistaken with other pathogens at the evaluation time by the health test.…”

Section: Resultsmentioning

confidence: 99%

Incidence of pathogens and field emergence of soybean seeds subjected to harvest delay

et al. 2013

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This study aimed at evaluating seed health quality, as well as seedling emergence in the field, of eight soybean cultivars (UFV-16, Splendor, Vencedora, Confiança, UFV-18, UFV-TN 105, Garantia, and Celeste) subjected to different harvest periods. To this, seeds were harvested at the growth stages R8, R8+15 days, and R8+30 days, and then submitted to health test and to the test of seedling emergence in field. Results showed that although seeds harvested at 15 and 30 days after the stage R8 had shown a significant increase of fungi infection, especially by Fusarium spp., Phomopsis spp., and Epicoccum spp., the percent seedling emergence in the field was reduced only to seeds harvested 30 days after the reproductive stage R8. Cultivars have shown differentiated behavior between each other in relation to the percent incidence rate of fungi and seedling emergence in the field; and the seeds least infected by fungi were those allowing the highest percent emergence of seedlings in the field.

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“…In mechanized harvest with shelling, suitable machine adjustment is important to reduce quantitative and qualitative losses; i.e., loss of grains or mass of grains, strictly speaking, and reduction in quality from cracking and breakage of the grain, as well as the occurrence of diseases (Pimentel and Fonseca, 2011). An additional negative aspect of mechanized harvest is emphasized by Gomes et al (2009) upon reporting that the damage caused to seeds by mechanized operations during production may have a negative effect on the quality of the material obtained.…”

Section: Introductionmentioning

confidence: 99%

Physiological performance during storage of corn seed treated with insecticides and fungicide

Deuner¹,

Rosa

Meneghello³

et al. 2014

J. Seed Sci.

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-The goal of storage is to maintain the characteristics that seeds have immediately after processing; however, when this is over longer periods, storage may cause loss in quality. The aim of this study was to evaluate the effect of treatment with insecticide and fungicide on corn seeds harvested in kernel form and in the ear over the time of storage in two environments for 360 days. The seeds were subjected to the following treatments: T1 -control; T2 -Deltamethrin + Pirimiphosmethyl + Fludioxonil; T3 -Deltamethrin + Pirimiphos-methyl + Fludioxonil + Thiamethoxam; T4 -Thiamethoxam, and T5 -Fenitrothion. They were then placed in paper bags and stored in two environments, in a cold room with an average temperature of 16 °C and RH of 60% and in a non-controlled environment (an average room temperature of 25 ºC and RH of 70%) located in the municipality of Pelotas, RS, Brazil. Every four months (0, 120, 240 and 360 days), seed germination and vigor was evaluated by the first count of germination test and cold test. Reduction in germination and vigor of corn seeds, conditioned by the insecticides and fungicide used in the seed treatment, vary according to the product and the time over which the seeds remain stored. The seeds harvested in the ear show lower loss of physiological quality than those harvested in kernel form.Index terms: Zea mays L., germination, vigor, seed treatment.Desempenho fisiológico durante o armazenamento de sementes de milho tratadas com inseticidas e fungicida RESUMO -O armazenamento tem por objetivo manter as características que as sementes possuem imediatamente após o beneficiamento, porém, quando por períodos mais extensos, o mesmo pode causar perdas na qualidade das mesmas. O objetivo neste trabalho foi avaliar o efeito do tratamento com inseticida e fungicida sobre sementes de milho colhidas a granel e em espiga durante o armazenamento em dois ambientes por 360 dias. As sementes foram submetidas aos tratamentos: T1-testemunha; T2-Deltamethrin + Pirimifós-metílico + Fludioxonil; T3-Deltamethrin +Pirimifós-metílico + Fludioxonil + Tiametoxam; T4-Tiametoxam e T5-Fenitrothion. Em seguida, foram acondicionadas em sacos de papel e armazenadas em dois ambientes: câmara fria com temperatura média de 16 °C e UR de 60% e em ambiente não controlado (câmara com temperatura média de 25 ºC e UR de 70%, localizada no município de Pelotas-RS). A cada quatro meses (0; 120; 240 e 360 dias) foi avaliada a germinação e o vigor das sementes, pelos testes de primeira contagem de germinação e teste de frio. A redução da germinação e do vigor de sementes de milho, condicionada pelos inseticidas e fungicida utilizados no tratamento das sementes, varia em função do produto e do tempo em que as sementes permanecem armazenadas. As sementes colhidas em espiga apresentam menor perda da qualidade fisiológica em relação às colhidas a granel.Termos para indexação: Zea mays L., germinação, vigor, tratamento de sementes.1

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Efeito da colhedora, velocidade e ponto de coleta na contaminação de sementes de soja por fungos

Cited by 8 publications

References 6 publications

Processing on the sanitary quality of seeds of Panicum maximum cv. ‘Tanzânia’

Processing on the sanitary quality of seeds of Panicum maximum cv. ‘Tanzânia’

Incidence of pathogens and field emergence of soybean seeds subjected to harvest delay

Physiological performance during storage of corn seed treated with insecticides and fungicide

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