Avaliação da produtividade de milho e controle de doenças foliares

Souza, Liliana; Pereira, José Luiz de Andrade Resende; Souza, Tamires Teles de

doi:10.18406/2316-1817v7n32015700

Cited by 4 publications

(2 citation statements)

References 10 publications

(9 reference statements)

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“…A study carried out by Souza et al (2015) reports that the use of preventive fungicides at the V6 stage and another application at the pre-sprouting stage of corn plants reduced the severity of diseases, especially cercosporiosis, and could be an auxiliary measure for integrated disease management, since late applications are not possible for corn crops using ground sprays. This management, combined with the choice of hybrids with greater tolerance or genetic resistance to the main diseases, has the potential to increase corn production in Brazil.…”

Section: Introductionmentioning

confidence: 99%

Path analysis associated with fungicide use in corn hybrids

Follmann,

Eggers,

Rosa

et al. 2023

Agraria

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The objective of this study was to identify the linear relationships between the morphological variables of corn hybrids, associated with grain yield and fungicide use in subtropical environments. Seven experiments were conducted in three locations: Santa Maria -RS, São Vicente do Sul -RS, and Frederico Westphalen -RS, Brazil. The design used was a randomized block design with subdivided plots and three replications, where the main factor was the use or not of fungicide and the subplots corresponded to six corn hybrids. The following traits were evaluated: leaf angle, stem diameter, ear insertion height, ear length, ear diameter, number of rows, grain length, thousand-grain mass, percentage of damaged grains, and grain yield. The characters were subjected to Pearson correlation analysis and path analysis using R software. It can be concluded that there is a difference in the magnitudes of the linear relationships depending on whether or not fungicides are used on corn hybrids in subtropical environments, with cultural management influencing the results of the linear relationships. The characters ear diameter, grain length, ear length, and thousand-grain mass are positively related, while leaf angle and the percentage of damaged grains are negatively related to grain yield in corn hybrids.

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Section: Introductionmentioning

confidence: 99%

Path analysis associated with fungicide use in corn hybrids

Follmann,

Eggers,

Rosa

et al. 2023

Agraria

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“…Em relação à rentabilidade do uso do fungicida, foi positiva para os híbridos AS1730, P3016, DKB230 e FEROZ. A aplicação de fungicida na cultura do milho tem demonstrado boa resposta na produtividade, ocorrendo principalmente devido ao fato de os fungicidas controlarem as principais doenças que atacam a cultura de forma eficiente quando aplicados corretamente(SOUZA et al, 2015;WISE et al, 2019) O híbrido AS1730, na primeira época em SM, apresentou maior índice de lucratividade e margem bruta para os tratamentos com e sem o uso de fungicidas. Por outro lado, o índice mais baixo foi o do FEROZ.…”

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Viabilidade econômica associada ao manejo de fungicida na cultura do milho em região subtropical

Bolzan,

Follmann,

Da Rosa

et al. 2023

Rev. DELOS

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O aumento da demanda por alimentos em muitos países evidencia a importância de estudos relacionados à produção de grãos de culturas comumente usadas na alimentação humana e animal. Avaliar a eficiência econômica de práticas agronômicas, como o uso de fungicidas, é importante para a viabilidade do cultivo de milho. O objetivo deste trabalho foi avaliar a viabilidade econômica do manejo de fungicidas na cultura do milho em ambientes subtropicais no sul do Brasil. Os experimentos a campo foram conduzidos com duas épocas de semeadura em três locais: Santa Maria, São Vicente do Sul e Frederico Westphalen, no estado do Rio Grande do Sul. O delineamento experimental utilizado foi de blocos ao acaso com parcelas subdivididas. A parcela principal foi formada pelos dois níveis do fator fungicida (com e sem), e a subparcela pelos seis níveis do fator híbrido de milho (AG9025, AS1730, P3016, MG300, DKB230 e FEROZ). Na colheita, foram avaliadas a massa de grãos de 216 parcelas experimentais para determinar a produtividade de grãos. Para a avaliação da viabilidade econômica, foram estimados os custos de produção, considerando o custo para duas aplicações de fungicida e o valor médio de comercialização do produto nas últimas três safras (2017/2018, 2018/2019 e 2019/2020). Portanto, a avaliação da rentabilidade econômica na cultura do milho em ambientes subtropicais no sul do Brasil permitiu constatar que os híbridos mais suscetíveis em condições favoráveis ao desenvolvimento de doenças apresentam melhor custo-benefício com a aplicação de fungicidas, sendo a resistência genética uma importante ferramenta para o manejo integrado de doenças.

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The efficiency of Brazilian oat cultivars in reducing fungicide use for greater environmental quality and food safety

Dornelles¹,

Silva²,

Colet³

et al. 2021

Aust J Crop Sci

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Oat cultivars more efficient at reducing fungicide can prevent contamination of soil, water and food. The objective of the study is to measure the efficiency of oat cultivars recommended for growing in Brazil by reducing the number of fungicide applications, considering favorable and unfavorable crop season conditions for productivity and progress of the main leaf diseases. The study was conducted in 2015, 2016 and 2017, in Augusto Pestana, RS, Brazil. The experimental design was a randomized block with three replications in a 22 x 4 factorial scheme, for 22 oat cultivars and 4 conditions of fungicide use [without application; an application at 60 days after emergence; two applications at 60 and 75 days after emergence; and three applications at 60, 75 and 90 days after emergence]. The fungicide FOLICUR® CE was used in 2015 and 2016 and the fungicide PRIMO® in 2017 in the dosage of 0.75 and 0.3 liters ha-1, respectively. The plots were sprayed using BD 04 fan nozzle with 45 PSI pressure, and spray volume close to 120 liters ha-1. The condition of a crop season favorable to the progress of leaf diseases identifies with quality cultivars more efficient in reducing the use of fungicide, enabling processes with lower environmental impacts with food security. Under favorable agricultural year conditions and unfavorable to the productivity and progress of the main leaf diseases of oats, the most efficient cultivars to reduce the use of fungicide are URS Altiva and URS Guria

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Avaliação da produtividade de milho e controle de doenças foliares

Cited by 4 publications

References 10 publications

Path analysis associated with fungicide use in corn hybrids

Path analysis associated with fungicide use in corn hybrids

Viabilidade econômica associada ao manejo de fungicida na cultura do milho em região subtropical

The efficiency of Brazilian oat cultivars in reducing fungicide use for greater environmental quality and food safety

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