Eficiência E Viabilidade Econômica Da Aplicação De Fungicidas No Controle Da Ferrugem Asiática Da Soja Em Campo Grande, MS

Gasparetto, R.; Fernandes, C. D.; Marchi, Carlos Eduardo; Borges, M. de F.

doi:10.1590/1808-1657v78p2512011

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…Since Asian rust initiates the infection process in the middle and lower thirds of plants, variations in application technology that allow the deposition of fungicides in the lower third of soybean can improve the disease control spectrum, preventing its progression to the younger trifoliate leaves (GASPARETTO et al, 2011;AUGUSTI et al, 2014). In this context, to measure the effect of spray nozzles and application volumes on droplet deposition in the different thirds of soybean plants subjected to fungicide treatments, evaluations of density (number) of droplets per cm 2 were performed.…”

Section: Resultsmentioning

confidence: 99%

“…Despite the good efficacy of the chemical method, some challenges are still present to increase the efficacy of fungicides against Asian rust, especially those related to application technology (CHECI et al, 2020). To ensure less progress of Asian rust, the fungicide application solution must be deposited in the middle and lower thirds of soybean plants, which constitute the starting point of infection by the fungus (GASPARETTO et al, 2011). In this context, soybean breeders have sought to select materials that have plants with distinct architectures and growth habits in order to favor the penetration of products applied in the crop canopy, which can help improve the efficacy of fungicides (LEE et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Fungicide Spraying Technologies in the Control of Asian Rust in Soybean Cultivars

MORAES

Ribeiro

2022

Rev. Caatinga

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The adequacy of spraying technology in the control of Asian rust to factors related to soybean cultivars and fungicide type is fundamental for the efficiency in the control of this disease. In this context, the objective was to evaluate the chemical control of Asian soybean rust and the deposition of the fungicide applied in the crop, according to different volumes and spray nozzles. Four field experiments were set up during the 2014/2015 season, each carried out with one soybean cultivar, using: NA 5909 RR®, NS 7237 IPRO®, BMX Potência RR® and W 712 RR®. The experimental design was randomized blocks in a 2x2x2 factorial arrangement, with four replications. The first factor corresponded to the use of fungicides: [pyraclostrobin + epoxiconazole] and [pyraclostrobin + epoxiconazole] + mancozeb; the second factor, types of spray nozzle: double and triple fan; and the last factor, application volume: 60 and 120 L ha-1. The highest application volume resulted in greater deposition of droplets in the canopy of the plants, regardless of the fungicide, type of spray nozzle and cultivar. The association of fungicides [pyraclostrobin + epoxiconazole] + mancozeb showed greater efficacy in controlling rust, regardless of the type of spray nozzle and the volume applied when compared to [pyraclostrobin + epoxiconazole]. The highest volume of application promoted less disease evolution in the cultivars NA 5909 RR®, NS 7237 IPRO® and BMX Potência RR®. The yields of the cultivar were higher when the combination [pyraclostrobin + epoxiconazole] + mancozeb was used.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fungicide Spraying Technologies in the Control of Asian Rust in Soybean Cultivars

MORAES

Ribeiro

2022

Rev. Caatinga

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“…al. 2008;Gasparetto et al 2011). It can also be explained by the less favorable microclimate, shorter period of wetness on the upper side of the leaf and the death of urediniospores due to exposure to sunlight(Zambenedetti et al 2007).…”

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confidence: 99%

Forecasting system in decision-making on the chemical control of Asian soybean rust

Engers,

Radons,

Henck

et al. 2023

Preprint

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Asian soybean rust (ASR; Phakopsora pachyrhizi) is one of the most important diseases of soybean that can reduce soybean yield. The frequent use of site-specific fungicides has led to the evolution of resistant populations of the pathogen, resulting in reduced effectiveness of chemical control. Thus, to reduce the number of fungicide sprays in the crop, disease forecasting systems are tools that could help in the decision-making process about the time for fungicide application. The aim of this study was to develop and validate a forecasting system for ASR to guide chemical control. Four experiments were carried out in three locations (Cerro Largo, Entre Ijuís and Passo Fundo) in the state of Rio Grande do Sul in southern Brazil. Treatments consisted of intervals of calculated severity values (CSV) between fungicide applications, in addition to control without application. Thousand-grain mass and yield (kg ha-1) were evaluated in addition to ASR severity. The data were subjected to analysis of variance using the F test and the means compared using the Tukey’s test at 5% error probability level. The results showed that the disease forecasting system allowed the yield maintenance in different locations and crop seasons, associated with a decrease in the number of fungicide sprays. Thus, we conclude that the proposed disease forecasting system is a viable tool for ASR management.

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“…Observa-se que no tratamento 7, sem aplicação de fungicida no vegetativo, o lucro foi bem mais baixo, quando comparado com os demais tratamentos (Tabela 15). Gasparetto et al (2011) verificaram que a aplicação de fungicidas, para controle de ferrugem asiática da soja, gerou receita superior (77,0% a 210,0%), em relação à testemunha.…”

Section: Tratamentosunclassified

Importância de fungicidas sítio-específicos e multissítios para o controle da ferrugem asiática (Phakopsora pachyrhizi) da soja, em diferentes cultivares, épocas de semeadura e análise do retorno financeiro

Kajihara¹

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A cada ano a ferrugem asiática causada por P. pachyrhizi destaca-se no cenário nacional, por causar sérios prejuízos as lavouras de soja. Além disso, a doença tem causado grande preocupação por evidenciar patógenos resistentes a diversos ingredientes ativos e com baixas eficiências de controle. Existem diversos relatos sobre avaliações de fungicidas no controle da doença, mas não correlacionam a viabilidade econômica do uso desses produtos. Aliado aos problemas atuais, é necessário adotar o uso de fungicidas multissítios e rotação de grupos químicos, uma vez que novos ativos dificilmente surgirão nos próximos anos. Assim sendo, o trabalho teve por objetivo avaliar a importância de fungicidas sistêmicos e multissítios no controle de ferrugem asiática com diferentes fungicidas, desde a fase vegetativa, envolvendo diferentes cultivares de soja e épocas de semeadura, com análise da rentabilidade dos cultivos. A fim de suportar os estudos de campo, o trabalho teve por objetivo avaliar a ação in vitro e in vivo de fungicidas multissítios e sítio-específicos. O experimento no campo foi realizado durante duas safras consecutivas, onde foi utilizado nove cultivares de soja, quatro repetições e sete tratamentos.

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Eficiência E Viabilidade Econômica Da Aplicação De Fungicidas No Controle Da Ferrugem Asiática Da Soja Em Campo Grande, MS

Cited by 4 publications

References 6 publications

Fungicide Spraying Technologies in the Control of Asian Rust in Soybean Cultivars

Fungicide Spraying Technologies in the Control of Asian Rust in Soybean Cultivars

Forecasting system in decision-making on the chemical control of Asian soybean rust

Importância de fungicidas sítio-específicos e multissítios para o controle da ferrugem asiática (Phakopsora pachyrhizi) da soja, em diferentes cultivares, épocas de semeadura e análise do retorno financeiro

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