Sanitary quality of Brachiaria brizantha cv. Marandu and Xaraés seeds harvested in different states in Brazil

Martins, Cibele Chalita; Melo, Paulo Alexandre Fernandes Rodrigues de; Pereira, Francisco Élder Carlos Bezerra; Neto, Antônio Pereira dos Anjos; Nascimento, Luciana Cordeiro do

doi:10.14393/bj-v33n6a2017-36533

Cited by 3 publications

(4 citation statements)

References 12 publications

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“…can be transmitted to the seedlings by being present in the seed as reported by Lasca, Vechiato and Kohara (2004) and may cause leaf and stem stains, drying of the leaves and death of the plant (TSUHAKO, 2009). This fungus has been reported in seed lots of marandu grass and xaraes grass from several regions (MARTINS et al, 2017).…”

Section: Resultsmentioning

confidence: 79%

“…Marandu (MALLMANN et al, 2013). Martins et al (2017) stated that the occurrence of these phytopathogens did not interfere in the germination of marandu grass seeds.…”

Section: Resultsmentioning

confidence: 99%

“…Discharges from the conditioning of the seeds can also contribute to the dissemination of fungi, as these materials are usually acquired from low-tech forage seed companies to be mixed with the seed lots and to serve less demanding markets (HESSEL et al, 2012). Moreover, the seed conditioning plants usually contain a high amount of suspended dust in the air, which could result in the machines and seeds being contaminated by spores present in the dust particles (MELO et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Tropical forage seeds may be an important vehicle for the spread of pathogens among different regions and few is known about their sanitary quality (VECHIATO; APARECIDO; FERNANDES, 2010). The presence of pathogens in the seeds results in a decrease in germination and vigor, which in turn, compromises the development and formation of the crop in the field (MARCHI et al, 2010;MALLMANN et al, 2013;MARCOS et al, 2015;MARTINS et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Seed conditioning process in the sanitary quality of marandu grass seeds

Jeromini¹,

Martins²,

Silva³

et al. 2020

Biosci. J.

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The purpose of seed conditioning process is to separate seeds and their associated structures into different fractions and retain only good and healthy seeds. Thus, the aim of this study was to evaluate the effects the stages of seed conditioning have on the sanitary quality of marandu grass seeds. The seeds were sampled before and during the seed conditioning process, i.e., after exiting the air-screen cleaner and sieves (seeds discharged from the top, middle and bottom sieves), the first gravity separator (seeds drifting around the table, upper and intermediate discharge) and second gravity separator (upper, intermediate and lower discharge). The sanitary analysis was performed using the filter paper method with and without surface disinfestation of the seeds, which were incubated at 20±2°C, with a photoperiod of 12 hours for seven days. The experiment was conducted in a completely randomized design, in a 2x6 factorial scheme (surface disinfestation x stages of the seed conditioning process) and ten replications. The data was submitted to analysis of variance, using the F test and, when significant, the means of the treatments were compared using the Tukey test at 5% probability. It was concluded that it is not possible to improve the sanitary quality of marandú grass seeds through the seed conditioning process.

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Section: Resultsmentioning

confidence: 79%

“…Marandu (MALLMANN et al, 2013). Martins et al (2017) stated that the occurrence of these phytopathogens did not interfere in the germination of marandu grass seeds.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seed conditioning process in the sanitary quality of marandu grass seeds

Jeromini¹,

Martins²,

Silva³

et al. 2020

Biosci. J.

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Seed-borne diseases in pasture grasses and legumes: state of the art and gaps in knowledge

2022

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Phytosanitary quality of Brachiaria brizantha ‘BRS Piatã’ seeds in function of climate conditions

Silva

Martins

Nascimento

et al. 2019

Rev. bras. eng. agríc. ambient.

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Infected seeds are one of the main pathogen transmission vehicles, and they are responsible for significant losses in production fields; phytosanitary defense depends on the inoculum and climatic factors. Thus, in this study, it was aimed to identify climatic variables of the regions that propitiate the production of Brachiaria brizantha 'BRS Piatã' seeds infected with phytopathogenic fungi. Temperature and rainfall data were obtained from 10 production fields, and phytosanitary quality of the seeds was evaluated with the filter paper method; the means were compared using the Kruskal-Wallis non-parametric analysis. Principal component analysis was performed to determine the relationship between the climatic variables and seed phytosanitary quality. Sites with maximum temperatures higher than 30 °C, mean values close to 25 °C, and rainfall less than 82 mm during harvest were favorable to the incidence of Fusarium spp. The incidence of Bipolaris sp. in the seeds of Piatã grass was favored by temperatures around 19 and 20 °C during the maturation phase. The highest incidence of Exserohilum sp. occurred at the sites in which the temperature during harvest was close to 20 °C and accumulated rainfall, between 167 and 181 mm.Qualidade sanitária de sementes de Brachiaria brizantha 'BRS Piatã' em função de condições climáticas RESUMO: A semente infectada é um dos principais veículos de transmissão de patógenos, responsáveis por perdas significativas em campos de produção e, as condições sanitárias destas dependem do inóculo e dos fatores climáticos presentes. Assim, objetivou-se identificar variáveis climáticas das regiões que propiciam a produção de sementes de Brachiaria brizantha, cv. BRS 'Piatã' , infectadas com fungos fitopatogênicos. Foram obtidos dados de temperatura e precipitação de 10 campos de produção e a sanidade das sementes foi avaliada pelo método do papel de filtro, com as médias comparadas pela análise não-paramétrica de Kruskal-Wallis. Para determinar a relação entre variáveis climáticas e a sanidade das sementes aplicou-se a análise de componentes principais. Locais com temperaturas máximas superiores a 30 °C, médias próximas a 25 °C e acúmulo de chuva inferior a 82 mm na colheita foram favoráveis à incidência de Fusarium spp.. A incidência de Bipolaris sp. em sementes de capim-piatã na fase de maturação é favorecida por temperaturas em torno de 19 e 20 °C. A maior incidência de Exserohilum sp. ocorre em locais cuja temperatura durante a colheita é próxima a 20 °C e a precipitação pluviométrica acumulada situa-se entre 167 e 181 mm.

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Sanitary quality of Brachiaria brizantha cv. Marandu and Xaraés seeds harvested in different states in Brazil

Cited by 3 publications

References 12 publications

Seed conditioning process in the sanitary quality of marandu grass seeds

Seed conditioning process in the sanitary quality of marandu grass seeds

Seed-borne diseases in pasture grasses and legumes: state of the art and gaps in knowledge

Phytosanitary quality of Brachiaria brizantha ‘BRS Piatã’ seeds in function of climate conditions

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