Incidência de fungos em grãos de milho em função de diferentes épocas de aplicação foliar de fungicida

Stefanello, Josemar; Bachi, Lilian Maria Arruda; Gavassoni, Walber Luiz; Hirata, Lucia Mayumi; Pontim, Bruno Cezar Álvaro

doi:10.1590/s1983-40632012000400014

Cited by 16 publications

(19 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The performance of two foliar applications (V8 + pre-tasseling) or one application at pre-tasseling of the fungicide azoxystrobin + cyproconazole resulted in a lower percentage of the fungus Fusarium sp. in the harvested grain in the two sowing periods (Stefanello, Bachi, Gavassoni, Hirata, & Pontim, 2012).…”

Section: Methodsmentioning

confidence: 99%

<b>Effect of foliar fungicide and plant spacing on the expression of lipoxygenase enzyme and grain rot in maize hybrids

et al. 2017

View full text Add to dashboard Cite

ABSTRACT. This study was carried out with the objective of evaluating the effect of fungicide application on grain rot in commercial maize hybrids and the relation between grain rot and the expression of lipoxygenase enzyme in grain in conventional row spacing of 0.70 m and reduced row spacing of 0.45 m. Treatments were made in a 3 x 8 factorial scheme, using three forms of management with fungicide (Trifloxystrobin + Prothioconazole) and eight maize hybrids divided into two groups (tolerant and susceptible) with three repetitions, totaling 72 plots in each environment (conventional and reduced spacing) in the 2013/2014 crop. The following characteristics were evaluated: grain rot percentage and lipoxygenase enzyme expression (LOX) in the grain. The hybrid and the fungicide utilized influenced the grain rot percentage. Grain rot percentage was reduced by the use of the fungicide, and the highest reduction was in susceptible hybrids with two applications, V8 and V8+VT. There was higher expression of LOX enzyme in maize hybrids that belong to the group tolerant of fungi that cause grain rot .The use of the fungicide in two applications, V8 (eight leaves) and VT (tasseling), increased the intensity of the LOX enzyme, which was more evident for the reduced spacing. Efeito de fungicida foliar e espaçamento de plantas na expressão da enzima lipoxigenase e podridão de grãos em híbridos de milho RESUMO. O objetivo deste trabalho foi avaliar o efeito da aplicação de fungicida sobre a podridão de grãos em híbridos comerciais de milho e a relação entre os grãos ardidos e a expressão da enzima lipoxigenase no grão, em espaçamento convencional de 0,70 m e reduzido de 0,45 m. Os tratamentos foram no esquema fatorial 3 x 8, com três formas de manejo com fungicida (Trifloxistrobina + Protioconazol) e oito híbridos de milho, sendo divididos em dois grupos (tolerantes e suscetíveis), com três repetições, totalizando 72 parcelas em cada ambiente (espaçamento convencional e reduzido), na safra agrícola 2013/2014. As seguintes caractrísticas foram avaliadas: porcentagem de grãos ardidos e expressão da enzima lipoxigenase (LOX) nos grãos. O fungicida reduziu a incidência de grãos ardidos, e a maior redução ocorreu nos híbridos suscetíveis, com duas aplicações, V8 e V8+VT. Houve maior expressão da enzima LOX em híbridos de milho pertencentes ao grupo tolerante aos fungos causadores de grãos ardidos. A aplicação do fungicida em duas aplicações, V8 (oito folhas) e VT (pendoamento), aumentou a intensidade da enzima LOX, mais evidente no espaçamento reduzido.Palavras-chave: LOX, podridão de espigas, controle químico, espaçamento reduzido, Zea mays.

show abstract

Section: Methodsmentioning

confidence: 99%

<b>Effect of foliar fungicide and plant spacing on the expression of lipoxygenase enzyme and grain rot in maize hybrids

et al. 2017

View full text Add to dashboard Cite

show abstract

“…apresentou incidência pouco relevante nos ensaios. A baixa incidência desse fungo, imediatamente após a colheita, também foi relatada em outros trabalhos (Stefanello et al, 2012); entretanto, sua incidência pode variar muito de acordo com o genótipo ou as condições climáticas (Ramos et al, 2010a).…”

Section: Resultsunclassified

Aplicação foliar de fungicidas e incidência de grãos ardidos e fumonisinas totais em milho

Lanza

Zambolim

Costa

et al. 2016

Pesq. agropec. bras.

View full text Add to dashboard Cite

Resumo -O objetivo deste trabalho foi avaliar a eficiência da aplicação foliar de fungicidas na redução da incidência de patógenos fúngicos, de grãos ardidos e de fumonisinas totais em grãos de milho (Zea mays). Foram conduzidos três ensaios: um no município de Luís Eduardo Magalhães, na Bahia, e dois em Sete Lagoas, em Minas Gerais, nas safras 2010/2011 e 2011/2012, com cultivo de diferentes híbridos comerciais. Os seguintes fungicidas foram aplicados zero, uma e duas vezes: picoxistrobina + ciproconazol, piraclostrobina + epoxiconazole, trifloxistrobina + tebuconazole, azoxistrobina + ciproconazol e tiofanato metílico. Em todos os ensaios, foram realizados a quantificação da incidência de grãos ardidos, o teste de patologia de sementes e a quantificação dos teores de fumonisinas totais. Não foi observada diferença significativa para os fatores fungicida e número de aplicações, exceto para rendimento de grãos, em todos os ensaios. Esses resultados são indicativos da ineficiência da aplicação de fungicidas na redução da incidência de patógenos fúngicos, de grãos ardidos e dos teores de fumonisinas totais em grãos de milho.Termos para indexação: Fusarium, Zea mays, controle químico, micotoxinas, patógenos fúngicos. Fungicide leaf application and incidence of kernel rot and total fumonisins in cornAbstract -The objective of this work was to evaluate fungicide leaf application on the reduction of fungal pathogen incidence, kernel rot, and total fumonisins in corn (Zea mays) kernels. Three experiments were performed: one in the municipality of Luís Eduardo Magalhães, in the state of Bahia, and two in the municipality of Sete Lagoas, in the state of Minas Gerais, Brazil, during the 2010/2011 and 2011/2012 crop seasons, with planting of different commercial hybrids. The following fungicides were applied zero, one, and two times: picoxystrobin + cyproconazole, pyraclostrobin + epoxiconazole, trifloxystrobin + tebuconazole, azoxystrobin + cyproconazole, and thiophanate-methyl. For all trials, the quantification of kernel rot incidence, the grain pathology test, and the quantification of total fumonisins were performed. No significant difference was observed for the factors fungicide and number of applications, except for grain yield, in all trials. These results show the ineffectiveness of fungicide applications in reducing fungi incidence, kernel rot, and levels of total fumonisins in corn kernels.Index terms: Fusarium, Zea mays, chemical control, mycotoxins, pathogenic fungi. IntroduçãoNa safra 2014/2015, o Brasil produziu cerca de 84 milhões de toneladas de milho (Zea mays L.), o que o tornou, além de autossuficiente para o consumo interno, um dos principais países exportadores desse cereal. Classificado como o terceiro maior exportador mundial, o Brasil comercializa quantidades superiores a 27 milhões de toneladas para países como o Irã, a Colômbia e a Coreia do Sul (Agrianual..., 2015).Contudo, as exigências comerciais relacionadas à qualidade dos grãos, destinados tanto à exportação quanto ao consumo interno, têm ...

show abstract

“…The contamination of farinaceous products by microorganisms such as bacteria and fungi can lead to changes in their chemical compositions, sensory properties and structures, a process known as deterioration, in addition to some of these microorganisms being pathogenic and causing diseases to humans (foodborne diseases). Several studies have highlighted the importance of studying the presence of fungi in grains and their by-products (Machado et al, 2009;Parada et al, 1996;Stefanello et al, 2012). Regarding the microbiological standards in Brazil, Resolution RDC ANVOSA / MS nº 12/2001 is currently in force, but it does not contemplate the determination of molds and yeasts.…”

Section: Introductionmentioning

confidence: 99%

Microbiological and physicochemical profiles of the sour cassava starch and bagasse obtained from cassava agroindustry

et al. 2019

View full text Add to dashboard Cite

The aim of this work was to evaluate the microbiological and physicochemical qualities of sour cassava starch and cassava bagasse produced during cassava agroindustry in order to evaluate their potential for use in food. All samples were kindly provided by family farmers producers from the region of Cará, in town of Bela Vista de Goiás, Brazil. All of sour cassava starch samples showed microbial counts within the values established by the current legislation. Drying process of raw cassava bagasse to produce the bran was sufficient to reduce the mold and yeast counts (from 1.9x10 3 to 3.5x10 1 CFU g-1) and of total coliform counts (from 2.1x10 3 to 2.4x10 2 MPN 100 mL-1), and also eliminated the contamination by coliforms at 45 ° C and Bacillus cereus. Carbohydrate contents of all sour cassava starch samples ranged from 99.64 to 99.75 g 100g-1. These results indicated that the sour cassava starch presented high degree of purity, and extraction process was efficient. Bran sample showed high carbohydrate (96.94 g 100g-1) and dietary fiber (22.58 g 100g-1) contents. High dietary fiber content suggests the use of bran as raw material to increase the availability of fiber in food products, increasing its nutritional quality.

show abstract

Incidência de fungos em grãos de milho em função de diferentes épocas de aplicação foliar de fungicida

Cited by 16 publications

References 4 publications

<b>Effect of foliar fungicide and plant spacing on the expression of lipoxygenase enzyme and grain rot in maize hybrids

<b>Effect of foliar fungicide and plant spacing on the expression of lipoxygenase enzyme and grain rot in maize hybrids

Aplicação foliar de fungicidas e incidência de grãos ardidos e fumonisinas totais em milho

Microbiological and physicochemical profiles of the sour cassava starch and bagasse obtained from cassava agroindustry

Contact Info

Product

Resources

About