Levantamento De Fungos Em Sementes De Trigo

Kobayasti, Leimi; Pires, Aline Pellozo

doi:10.5216/pat.v41i4.12388

Cited by 12 publications

(14 citation statements)

References 12 publications

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“…Similar to the results found by Barreto et al (2015) that also verified a low incidence (4.6%) of this fungus in cowpea (V. unguiculata). Kobayasti et al (2011) found that the seed deterioration the smooth top (Jatropha curcas L.) is related to the presence of Chaetomium sp. The action of this pathogen depends on the physical and physiological conditions of the seeds and the environmental factors that predominate during the storage (Ruiz Filho et al, 2004).…”

Section: Resultsmentioning

confidence: 99%

Physiological and Sanitary Quality in Cowpea Seeds Produced in Rio Grande Do Norte, Brazil

Silva¹,

Lopes²,

Andrade³

et al. 2019

JAS

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Section: Resultsmentioning

confidence: 99%

Physiological and Sanitary Quality in Cowpea Seeds Produced in Rio Grande Do Norte, Brazil

Silva¹,

Lopes²,

Andrade³

et al. 2019

JAS

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“…The fungus infects mainly spikes and is common its occurrence in combination with Fusarium species. In addition to infection on spikes, leaf lesions may also occur under hot and humid conditions (Kohli et al, 2011;Saharan et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Through seeds, microorganisms can be transported for long distances and easily introduced into new areas (Nasser, 1987). The incidence of F. graminearum on seeds was quantified in many studies (Telles Neto et al, 2007;Kabeere et al, 1997;Garcia Júnior et al, 2008;Kobayasti and Pires, 2011) and could be up to 48% (Kabeere et al, 1997;Danelli et al, 2012). For P. grisea, the pathogen incidence was also measured in different studies, and most of them reported incidences about 6 to 18% (Goulart and Paiva, 1991;Goulart and Paiva, 1993).…”

Section: Introductionmentioning

confidence: 99%

“…For P. grisea, the pathogen incidence was also measured in different studies, and most of them reported incidences about 6 to 18% (Goulart and Paiva, 1991;Goulart and Paiva, 1993). However, pathogen incidences of 63% on seeds were also verified (Kobayasti and Pires, 2011). Management of FHB and wheat blast include the use of healthy seeds, crop rotation, anticipated sowing, and chemical control applied on over aerial parts or by seed treatment Casa, 2007, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Efficiency of Blotter test and agar culture medium to detect Fusarium graminearum and Pyricularia grisea in wheat seeds

Camargo¹,

Moraes²,

Menten³

2017

J. Seed Sci.

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-Seeds can be considered one of the most efficient forms to disseminate pathogens. Therefore, the use of healthy seeds is extremely important to establish a crop, and seed health testing must be performed to determine the seed sanitary quality. This study aimed to compare the efficiency of seed health testing to detect Pyricularia grisea and Fusarium graminearum in three samples of wheat seeds. Methods evaluated were Blotter test with freezing (BTF) and potato-dextrose-agar culture medium (PDA). The incubation temperatures were 20 ºC and 25 ºC. From each sample, a subsample was submitted to seed asepsis using hypochlorite solution (1%) and another analyzed without seed asepsis. The temperatures evaluated did not influence the detection of the pathogens. P. grisea incidence ranged from 4.5 to 17% with BTF without seed asepsis. The BTF with seed asepsis and PDA (with and without seed asepsis) presented pathogen incidence no higher than 1.5%. Moreover, results suggested that most part of P. grisea inoculum was presented externally on seed tissues. PDA medium was more efficient to detect F. graminearum, independently of seed asepsis. By this method, pathogen incidence ranged from 3 to 39%. F. graminearum incidence using BTF with seed asepsis varied from 0.5 to 1.5% and BTF without seed asepsis presented a pathogen incidence of 5.0 to 12.5%. The Blotter test with freezing was more efficient to detect P. grisea while the PDA medium was more efficient to detect F. graminearum.Index terms: Triticum aestivum, detection methods, seed pathology.Eficiência do método do papel de filtro e do meio de cultura agarizado na detecção de Fusarium graminearum e Pyricularia grisea em sementes de trigo RESUMO -Sementes podem ser consideradas como uma das formas mais eficientes na disseminação de patógenos. Portanto, o uso de sementes sadias é de extrema importância para o estabelecimento de uma cultura e testes de sanidade devem ser realizados para determinar a sua qualidade sanitária. O presente trabalho teve como objetivo comparar a eficiência de métodos de sanidade na detecção de Pyricularia grisea e Fusarium graminearum em três amostras de sementes de trigo. Os métodos avaliados foram o papel de filtro com congelamento (PFC) e o meio de cultura batata-dextrose-ágar (BDA). As temperaturas de incubação foram 20 ºC e 25 ºC. De cada amostra, uma submostra foi submetida a assepsia de sementes usando solução de hipoclorito (1%) e outra analisada sem assepsia. As temperaturas analisadas não influenciaram na detecção dos patógenos. A incidência de P. grisea variou de 4,5 a 17% no método PFC sem assepsia das sementes. O PFC com assepsia e o BDA (com e sem assepsia) apresentou incidência do patógeno inferior a 1,5%. Além disso, os resultados sugeriram que a maior parte do inóculo de P. grisea estava presente externamente aos tecidos da semente. O meio BDA foi mais eficiente na detecção de F. graminearum, independentemente da assepsia das sementes. Por esse método, a incidência do patógeno variou de 3 a 39%. A incidência de F. grami...

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“…200 seeds were used, divided into four repetitions and placed in gerbox, seed dispersal on two sheets of paper germiteste sterile and moistened with distilled and autoclaved water in proportion to 2.5 times your weight [22]. A solution of 1.05% sodium hypochlorite was …”

Section: Sanitary Evaluationmentioning

confidence: 99%

Application of Non-Selective Herbicides in the Pre-Harvest of Wheat Damages Seed Quality

Fipke¹,

Martin²,

Nunes³

et al. 2018

AJPS

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Pre-harvest desiccation in order to minimize the time of exposure to abiotic factors after physiological maturity is a practice used in the production of quality seeds. The aim of this work was to evaluate the physical, physiological and sanitary quality of wheat seeds from plants that received non-selective herbicide application at pre-harvest. For this, the treatments were applied on pre-harvest culture. A completely randomized design was applied. We use the herbicides (glufosinate-ammonium, glyphosate and paraquat), phenological stages of herbicide application (Z-83, Z-85, Z-87, Z-92) and additional treatment (without application). The routine tests that express the physical, physiological and sanitary integrity of seeds were evaluated. For herbicide treatments, there was an 8% and 26% reduction in germination under laboratory conditions for BRS Parrudo and Sinuelo, respectively. Soil emergence was 14% higher for the control treatment, not statistically different for the Z-87 and Z-92 stages and also for the herbicides glufosinate-ammonium and glyphosate for both cultivars. The application of non-selective herbicides on wheat pre-harvest impairs the physical and physiological quality and promotes faster deterioration. Vigor is reduced under stress conditions by cold test and accelerated aging. There is no influence on seed sanity.

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Levantamento De Fungos Em Sementes De Trigo

Cited by 12 publications

References 12 publications

Physiological and Sanitary Quality in Cowpea Seeds Produced in Rio Grande Do Norte, Brazil

Physiological and Sanitary Quality in Cowpea Seeds Produced in Rio Grande Do Norte, Brazil

Efficiency of Blotter test and agar culture medium to detect Fusarium graminearum and Pyricularia grisea in wheat seeds

Application of Non-Selective Herbicides in the Pre-Harvest of Wheat Damages Seed Quality

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