Qualidade fisiológica e sanitária de sementes de arroz com diferentes graus de umidade e tratadas com fungicida

Schuch, Juliano Zambrano; Filho, Orlando Antônio Lucca; Peske, Silmar Teichert; Dutra, Luiz Marcelo Costa; Brancão, Mirian Fernandes; Rosenthal, Mariane D’Avila

doi:10.1590/s0101-31222006000100007

Cited by 10 publications

(9 citation statements)

References 2 publications

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“…In this context, about 50 species of fungi are associated with rice seeds, causing serious damage to germination, vigor, and seed-seedling transmission (SCHUCH et al, 2006). Storing seeds is considered a key step that deserves special attention from the seed agribusiness sector.…”

Section: Introductionmentioning

confidence: 99%

Effect of carbon dioxide on quality of rice seeds

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Effect of carbon dioxide on quality of rice seeds

et al. 2015

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“…There are studies assessing the effects of this fungicide on seed physiological quality of cotton (Faria et al, 2003), castor plant (Tropaldi et al, 2010;Santos et al, 2012), peanuts (Bittencourt et al, 2007), rice (Schuch et al, 2006;Lobo, 2008;Morales et al, 2012), maize (Fessel et al, 2003), safflower , and wheat (Marini et al, 2011), among other species. However, no research on vegetables was found that studied the fungicide effect on seed quality.…”

Section: Introductionmentioning

confidence: 99%

Germination, vigor and pathogen incidence in broccoli seed treated with Carboxin + Thiran

Cardoso¹,

Lanna²,

Silva³

et al. 2015

Afr. J. Agric. Res.

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The purpose of treating seeds chemically is to eradicate their pathogens and/or protect them against soil pathogens, mainly by germination time. However, there is little research on vegetables investigating the effect of this treatment on seed quality. Therefore, this study evaluates the effects of Carboxin + Thiram doses on germination and vigor of three lots of broccoli seeds, as well as on the incidence of fungi in treated seed. The 15 treatments were evaluated in a factorial system (3x5), with the first factor consisting of three lots of 'Avenger' broccoli seeds (lots 82744, 82745 and 82749), and the second factor consisting of five doses (0, 0.04, 0.06, 0.10 and 0.12% of a.i.) of Carboxin + Thiram fungicide (commercial name Vitavax-Thiran). The germination and seed vigor were evaluated, in addition to the presence of pathogens in seeds after treatment (blotter test). All lots showed high levels of germination and vigor. The lot 82749, however, showed higher value in plug test in substrate emergence (99%) than lot 82745 (95%). Regarding the treatment with Carboxin + Thiram, no changes in germination average (98%) and vigor were noticed (average for the first germination count, length, and dry weight of seedling, plug test at 10 days after sowing of 97%, 4.9 cm, 4.0 mg and 96%, respectively), showing that this fungicide, in the evaluated doses, does not affect the quality of broccoli seeds. As to seeds health, the pathogens Alternaria spp. and Fusarium spp. were detected, in addition to saprophytic species such as Penicillium, Aspergillus, Trichoderma, and Rhizopus. The higher incidence of Fusarium spp. was noticed in lot 82744, and the lowest in lot 82749. As to Penicillium spp., lot 82479 was the most contaminated. Regarding other fungi, the general incidence was very low and there was no difference between lots and doses used.

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“…Segundo Schuch et al (2006), o aumento do volume de calda melhora distribuição de produtos sobre a superfície da semente, porém deve-se ressaltar que o excesso de solução aquosa, pode causar danos, soltando o tegumento e prejudicando a germinação (KRZYZANOWSKI et al, 2006).…”

Section: Introductionunclassified

INOCULATION OF Azospirillum brasilense IN PHYSIOLOGICAL QUALITY OF SWEET CORN SEED

Souza¹,

Magalhães²,

Alves³

et al. 2014

Nucleus

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RESUMO:Objetivou-se avaliar a qualidade fisiológica de sementes de milho doce submetidas à inoculação de Azospirillum brasilense em diferentes períodos e diluições em água. O experimento foi conduzido no delineamento inteiramente casualizado, com quatro repetições em esquema fatorial (4 x 4), mais uma testemunha que não recebeu inoculação de A. brasilense. Foram avaliados quatro períodos entre a inoculação e a instalação dos testes (0, 24, 48 e 72 horas) e quatro diluições do inoculante em água (1:0, 1:1, 1:2 e 1:3). Foram utilizadas sementes de milho doce híbrido comercial Tropical Plus e as estirpes de A. brasilense Ab-V5 e Ab-V6, na dose do produto comercial de 4 mL kg -1 de semente. Os parâmetros avaliados foram germinação, primeira contagem de germinação, porcentagem de sementes anormais, emergência de plântulas, índice de velocidade de emergência, comprimento de epicótilo e de raiz, massa de matéria seca da parte aérea e raiz. A diluição de A. brasilense em água não afetou nenhum parâmetro avaliado na semente de milho doce, e o aumento no tempo entre a inoculação e a instalação dos testes proporcionou redução na primeira contagem de germinação, índice de velocidade de emergência e massa de matéria seca de raiz. Conclui-se que, em condições de laboratório, a inoculação de A. brasilense não beneficia a germinação e vigor das sementes de milho doce.Palavras-chave: Germinação. Diazotrófica. Fixação biológica de nitrogênio. Vigor. INOCULATION OF Azospirillum brasilense IN PHYSIOLOGICAL QUALITY OF SWEET CORN SEED SUMMARY:The aimed of this study was to survey the physiological quality of sweet corn seeds submitted to inoculation of Azospirillum brasilense in different periods and dilutions in water. The experiment was conducted on the entirely randomized design with four replications in a factorial (4 x 4) more a witness without inoculation of A. brasilense. Were evaluated four periods between the inoculation and installation of the tests (0, 24, 48 and 72 hours) and four dilutions of the inoculant in water (1:0, 1:1, 1:2 and 1:3). Were utilized seeds of sweet corn evaluated Tropical Plus hybrids and commercial strains of A. brasilense Ab-Ab-V5 and V6, in the dose of the commercial product 4 mL kg -1 seed. The parameters evaluated were germination, first count of germination, percentage of abnormal seeds, emergency, emergency speed index, length of epicotyl and of root, mass of the dry matter of shoots and of root. The dilution of A. brasilense in water did not affect no one parameter evaluated on the seeds of sweet corn, and the increase in the time between inoculation and the installation of the tests provide reduction on the first count of germination, speed emergency index and mass of dry matter of roots. It is concluded that, under laboratory conditions, inoculation of A. brasilense not benefits to germination and seed vigor of sweet corn.

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Qualidade fisiológica e sanitária de sementes de arroz com diferentes graus de umidade e tratadas com fungicida

Cited by 10 publications

References 2 publications

Effect of carbon dioxide on quality of rice seeds

Effect of carbon dioxide on quality of rice seeds

Germination, vigor and pathogen incidence in broccoli seed treated with Carboxin + Thiran

INOCULATION OF Azospirillum brasilense IN PHYSIOLOGICAL QUALITY OF SWEET CORN SEED

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