Aplicações preventivas e erradicantes de fungicidas no controle da ferrugem asiática da soja

Augusti, Guilherme Rossato; Sari, Bruno Giacomini; Costa, Ivan Francisco Dressler da; Rodrigues, Joelton dos Santos; Guerra, Renato Carnellosso

doi:10.1590/0100-5405/2006

Cited by 5 publications

(5 citation statements)

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“…To give an idea of the aggressiveness that the rust-causing fungus had in the experimental area, in less than 30 days, the mean severity values among soybean cultivars exceeded 80%. These data show the high aggressiveness that the Asian rust-causing fungus has in causing damage, pointing to the importance of preventive actions for the integrated management of this disease in soybean crop (AUGUSTI et al, 2014).…”

Section: Resultsmentioning

confidence: 83%

“…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%

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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: 83%

Section: Resultsmentioning

confidence: 99%

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

MORAES

Ribeiro

2022

Rev. Caatinga

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“…Alves and Juliatti (2018) in a work with the application of mancozeb and systemic fungicides concluded that the effect of adding protective fungicides with systemic fungicides varied according to the interaction between these molecules. However, the applications made by Alves and Juliatti (2018) started when the plants were in the R1 stage, and, in general, the preventive applications of fungicides are more efficient in controlling rust compared to eradicating applications (AUGUSTI et al, 2014), and the protective fungicides, when applied under ideal conditions, remain on the leaves and inhibit the germination of spores in a range of hosts and in a non-specific way, acting in several fungal cell sites (REIS, 2014;ZAMBOLIM et al, 2008), therefore, being more efficient when applied preventively.…”

Section: Resultsmentioning

confidence: 99%

Fungicide management in the Asian soybean rust

Neto¹,

Souza

Bertoncello³

et al. 2021

R. Agrogeoambiental

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Asian soybean rust is the major crop disease and the management of the use of the fungicide is important for effective control. The objective of this work was to evaluate the management of fungicides with sequential applications to control Asian soybean rust. The experimental design used was a randomized block with four replications and eight treatments with different combinations of fungicides from the following chemical groups: triazole, strobilurin, carboxamide, and dithiocarbamate. The applications were carried out with backpack spray equipment at constant pressure (CO2) and a spray rate of 200 L ha-1. The severity of rust, the area under the disease progress curve, control efficiency, mass of 1,000 grains, and productivity were evaluated. The protective fungicide mancozeb, in mixtures with systemic fungicides, were more effective for the control of Asian soybean rust than the systemic fungicides applied without the protective fungicide.

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“…As of today, there is great difficulty in predicting and monitoring the presence of this pathogen in soybean crops. In an attempt to avoid losses and minimize the spread of this disease, a preventive application of fungicides has become an alternative (Augusti et al, 2014). However, this management, suffering deleterious effects (Sosa-Gómez, 2005), may affect beneficial organisms in the agroecosystem.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the selectivity of registered fungicides for soybean against Trichogramma pretiosum Riley, 1879(Hymenoptera: Trichogrammatidae)

Magano¹,

Grützmacher²,

Armas³

et al. 2015

Afr. J. Agric. Res.

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The aim of this study was to evaluate the effects of fungicides registered for soybean on the parasitoid Trichogramma pretiosum Riley, 1879 (Hymenoptera: Trichogrammatidae). Bioassays wereconducted in laboratory exposing adult insects to dried residues of fungicides, using the methodology proposed by the International Organization for Biological and Integrated Control of Noxious Animals and Plants (IOBC). The experimental design was completely randomized with four replications per treatment. The parameter used for classification of fungicides was based on the reduced parasitism (RP) evidenced by the number of parasitized eggs per female in the control treatment. Based on these results, we found that fungicides are classified in different classes of selectivity to adults of T. pretiosum regarding the tested fungicides. The fungicides cyproconazole, epoxyconazole + kresoxim-methyl, metconazole, thiophanatemethyl (CS), pyraclostrobin, difenoconazole, were classified as harmless (Class 1); carbendazim, carbendazim + thiram, tetraconazole, tetraconazole+ azoxystrobin, epoxyconazol + pyraclostrobin, tebuconazole, prothioconazole + trifloxystrobin, tebuconazole + trifloxystrobin, azoxystrobin, azoxystrobin + cyproconazole, and thiophanate methyl (WG) were slightly harmful (Class 2); flutriafol, thiophanate methyl (WP), epoxyconazole + pyraclostrobin, and cyproconazole+ trifloxystrobin were moderately harmful (Class 3); and Kumulus DF was harmful (Class 4) to the adult parasitoids.

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Aplicações preventivas e erradicantes de fungicidas no controle da ferrugem asiática da soja

Cited by 5 publications

References 0 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

Fungicide management in the Asian soybean rust

Evaluating the selectivity of registered fungicides for soybean against Trichogramma pretiosum Riley, 1879(Hymenoptera: Trichogrammatidae)

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