Características patogênicas de isolados do complexo Fusarium graminearum e de Fusarium verticillioides em sementes e plântulas de milho

Júnior, Paulo Roberto de Agronomia Departamento de Fitossanidade Kuhnem Faculdade; Stumpf, Raquel; Spolti, Piérri; Ponte, Emerson Medeiros de Agronomia Departamento de Fitossanidade Del Faculdade

doi:10.1590/s0103-84782013000400004

Cited by 15 publications

(11 citation statements)

References 20 publications

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“…and Fusarium sp. can be considered as the main pathogenic microorganisms associated with forage grass seeds, have rapid, aggressive growth, and can cause seed death and reduction in seedling emergence percentage (Yang et al, 2011;Kuhnem Júnior et al, 2013;Mallmann et al, 2013). Additionally, they were considered by Martins et al (2001) and Marchi et al (2010) as the most common fungi in pastures of P. maximum.…”

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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“…graminearum e F. verticillioides apresentam padrões distintos, quanto à taxa de crescimento micelial e características patogênicas, em sementes e plântulas de milho, as quais podem representar risco ao estabelecimento da cultura, pela redução da germinação e emergência de plântulas (Kuhnem--Júnior et al 2013). Teste de frio (%)…”

Section: Fusarium Graminearum Fusarium Verticillioidesunclassified

Infecção por Fusarium graminearum e Fusarium verticillioides em sementes de milho

Ramos

Barbosa

Vieira

et al. 2014

Pesqui. Agropecu. Trop.

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INTRODUÇÃOA semente é o principal insumo agrícola, uma vez que transporta para o campo todo o potencial genético da espécie, e, para que este se expresse, é necessário, dentre outros fatores, que a semente possua elevado potencial fisiológico e ausência de patógenos.Sementes de milho são susceptíveis a diversos fungos prejudiciais, durante as diferentes fases de produção, principalmente durante o estabelecimento ABSTRACT RESUMO da cultura, e estes ocasionam redução na população de plantas e enfraquecimento de plântulas, durante as etapas iniciais de seu desenvolvimento (Cappelini et al. 2005). Algumas espécies do gênero Fusarium têm sido associadas a doenças do milho, como Fusarium graminearum Schwabe (teleomorfo, Gibberella zeae (Scw.) Petch) e Fusarium verticillioides (Sacc.) Nirenberg (sinônimo, Fusarium moniliforme Sheldon; teleomorfo, Gibberella moniliformes, si-1. Trabalho recebido em fev./2013 e aceito para publicação em jan./2014 (nº registro: PAT 22694).

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“…Many works were developed to verify the effect of Fusarium on maize seeds quality, and according to all these works, the presence of this fungi did not affect the germination of maize seeds (Cappelini et al, 2005;Catão et al, 2013;Moraes et al, 2003), however, it is very important on maize crop, once can cause important diseases like root rot, death of seedlings, ear rot, stalk rot culminating in reductions of productivity and quality (Kuhnem Júnior et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

Mechanical Damages and Chemical Treatments in the Quality of Maize Seeds Stored

Ribeiro¹,

Pires²,

Fantazzini³

et al. 2019

JAS

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The current system of seeds production is highly mechanized and these operations can contribute to losses in quality due the incidence of mechanical damages. The objective in this work was to study the effect of the chemical treatment and the storage on quality of maize seeds with mechanical damages. The seeds used were individually analyzed through X-ray test for the obtainment of three lots; 1-seeds without separation, 2-seeds without mechanical damages and 3-seeds with mechanical damages. The lots were evaluated according the physiological quality, sanity and enzymatic analyzes before and after the chemical treatment with the insecticide Maxim Advanced® and the fungicide Cruiser® and also after 90 days of storage. The chemical treatment of maize seeds is efficient in the control of pathogens, like Fusarium sp. The performance of seeds with internal and external damages can be maintained for 90 days when treated with fungicides and insecticides and stored in environment conditions. The isoenzymatic patterns of catalase (CAT), superoxide dismutase (SOD), malate dehydrogenase (MDH) and alcohol dehydrogenase (ADH), confirmed the higher deterioration of non-treated seeds during the storage. The mechanical damages found in seeds contribute to the reduction of viability and vigor of maize seeds.

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Características patogênicas de isolados do complexo Fusarium graminearum e de Fusarium verticillioides em sementes e plântulas de milho

Abstract: RESUMO

Cited by 15 publications

References 20 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’

Infecção por Fusarium graminearum e Fusarium verticillioides em sementes de milho

Mechanical Damages and Chemical Treatments in the Quality of Maize Seeds Stored

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