The combined use of spray volumes and droplet sizes in the chemical control of Asian soybean rust in cultivars with different leaf area indices

Chechi, Amanda; Roehrig, Rafael; Piton, Bruna; Luz, Magda Ribeiro da; Deuner, Carolina Cardoso; Forcelini, Carlos Alberto; Boller, Walter

doi:10.1016/j.cropro.2020.105212

Cited by 7 publications

(6 citation statements)

References 11 publications

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“…This result proves the importance of taking into account the soybean cultivar and the product used in the choice of the best fungicide spraying technology. These results are in accordance with those reported by Checi et al (2020), who verified significant effect on Asian rust control and soybean yield due to variations in spray nozzles and droplet size, and this result was also influenced by the architecture of the cultivar used.…”

Section: Resultssupporting

confidence: 93%

“…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).…”

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: Resultssupporting

confidence: 93%

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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“…Insecticides and fungicides generally have certain systemic properties, but post-emergence herbicides require more contact with weeds and higher application techniques. Among all application parameters, the spray volume and the droplet size were the most important because they play an important role in the control efficacy, which should be defined before spraying [23] . This conclusion was especially important in herbicidal applications [24] .…”

Section: Introduction mentioning

confidence: 99%

Effects of droplet size and spray volume parameters on droplet deposition of wheat herbicide application by using UAV

Shan

Wang

Wang³

et al. 2021

International Journal of Agricultural and Biological Engineering

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With the characteristic of flexible and precise, unmanned aerial vehicles (UAVs) for low volume applications are increasing substantially and quickly around the globe. However, little attention has been paid to the study of wheat herbicides with UAV, especially the research on the spray volume and droplet size of the herbicide sprayed by UAVs. The objectives of this study were to compare the droplet deposition from a typical commercial UAV under four different spray volumes of 7.5 L/hm 2 , 15.0 L/hm 2 , 22.5 L/hm 2 , and 30.0 L/hm 2 and three different volume median diameter (VMD) of 150 μm, 200 μm, and 300 μm during winter wheat weeding period. DepositScan software was used to analyze droplet deposition parameters including the percentage of spray coverage and the number of droplets in various sampling positions. The test results showed that the droplet deposition was effected by each factor and their interactions. When the spray volume was 7.5 L/hm 2 , the effect of VMD on the percentage of spray coverage was not significant. However, these variation rules were changed to smaller droplets with greater coverage when the spray volume higher than 15.0 L/hm 2 . In all treatments, the number of droplets increased with decreasing VMD or increasing spray volume. The maximum percentage of spray coverage and the number of droplets that were achieved under the VMD of 150 μm and the spray volume of 30.0 L/hm 2 were 12.8% and 40.0 droplets/cm 2 , respectively. The variation coefficients of the percentage of spray coverage and the number of droplets were 29.0%-73.3% and 20.2%-54.1%, respectively. The most uniform deposition was achieved under the spray volume of 15.0 L/hm 2 and the VMD of 150 μm. The results revealed the effect of droplet size and spray volume parameters on droplet deposition, which was useful for guiding farmers on how to use UAVs for weeding in winter wheat fields.

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“…O plantio foi realizado no dia 24 de outubro de 2020, sendo elas: TMG 7067 (V1), 58i60RFSF IPRO (V2) e NA 5909 (V3), com sementes previamente tratadas com fungicida e micronutrientes, na densidade de 10, 13 e 15 plantas por metro linear, respectivamente, seguindo as orientações das empresas de sementes. V1 apresenta hábito de crescimento semideterminado e pertence ao grupo de maturidade 7.2 (Zuffo et al, 2022), já V2 possui crescimento indeterminado, pertencendo ao grupo de maturidade 5.8 (Chechi et al, 2020).…”

Section: Condução Da Culturaunclassified

Produtividade da área e da água em soja irrigada para diferentes variedades e metodologias de manejo da irrigação

França¹

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Produtividade da área e da água em soja irrigada para diferentes variedades e metodologias de manejo da irrigação / Ana Carolina Ferreira França. --versão revisada de acordo com a Resolução CoPGr 6018 de 2011. --Piracicaba, 2023. 73 p.Dissertação (Mestrado) --USP / Escola Superior de Agricultura "Luiz de Queiroz".1. Produtividade da água 2. Glycine max 3. Agricultura irrigada 4. Eficiência do uso da água L. . I. Título AGRADECIMENTOSÁ Deus, por me abençoar, proteger e permitir chegar até aqui.Aos meus pais, por todo suporte e amor, que sem os quais eu jamais teria finalizado mais essa etapa. Essa conquista é nossa! À minha irmã e toda a minha família, pelo apoio e carinho durante essa jornada.Aos meus amigos, de longa data e recentes, pelos momentos de verdadeira amizade, alegria e respeito, que tornaram meus dias mais leves.Aos meus colegas de departamento e amigos, em especial Alice, Michele, Sarah, Carlos, Júnior e Hugo, por todo apoio e momentos especiais ao longo dessa jornada.Ao meu orientador, Prof. Dr. Rubens Duarte Coelho, pela oportunidade, acolhimento, paciência e conhecimento para a conclusão desta etapa.

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The combined use of spray volumes and droplet sizes in the chemical control of Asian soybean rust in cultivars with different leaf area indices

Cited by 7 publications

References 11 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

Effects of droplet size and spray volume parameters on droplet deposition of wheat herbicide application by using UAV

Produtividade da área e da água em soja irrigada para diferentes variedades e metodologias de manejo da irrigação

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