Spray Nozzles Performance in Fungicides Applications for Asian Soybean Rust Control

Durão, Cléber França; Boller, Walter

doi:10.1590/1809-4430-eng.agric.v37n4p709-716/2017

Cited by 7 publications

(6 citation statements)

References 6 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In order to have a higher quality in the data obtained, it is necessary to adopt the largest plot size, since the adoption of smaller plots leads to an increase in the experimental error and, consequently, the experimental precision decreases (LÚCIO and SARI, 2017). Thus, the optimal plot size for reflectance studies in soybean is 6.30 m², two lines of 7 m, or it is also possible to recommend the adoption of an immediately higher LxW, in this case, LxW = 16 or 7.20 m², with grouping of 4 lines of 4 m. This plot size is smaller than that adopted by Cerezini et al (2016) in their study, when they adopted 8.0 m2 plots for the study of early soy nodulation, by Hungary et al (2015) who adopted 10.0 m² plots in the study of herbicide resistance in biological nitrogen fixation and soybean production and by Durão and Boller (2017) who adopted an area of 11.25 m² in the study of spray nozzles in rust control Asian soybean.…”

Section: Resultsmentioning

confidence: 89%

Estimation of the Optimum Size of Plots for Soybean Radiometer Experiments

et al. 2021

View full text Add to dashboard Cite

The lack of error of experimental planning in agricultural field studies can result in rework, causing the waste of financial resources. The determination of the optimal size of the experimental plot for carrying out the treatments can minimize these problems. The objective of this paper was to estimate the optimal plot size for measuring reflectance in soybeans, without treatment, using the modified maximum curvature method and the maximum distance method. Reflectance readings were taken in the soybean crop with the aid of the GreenSeeker® equipment, in basic experimental units of 0.45 m², in an area of 7 lines and 8 meters in length. The data were collected in three phenological stages of soy (R4, R5.5 and R6), obtaining 63 simulations of experimental area in each stage. Based on the results, it is recommended to use plots of 7.20 m², with grouping of 4 lines of 4 m in length.

show abstract

Section: Resultsmentioning

confidence: 89%

Estimation of the Optimum Size of Plots for Soybean Radiometer Experiments

et al. 2021

View full text Add to dashboard Cite

show abstract

“…No difference was observed for AUDPC. Durão & Boller (2017) obtained the lowest soybean rust AUDPC values when medium-sized droplets were used. For systemic fungicide application, the droplets must remain in contact with the leaf for a certain period of time to allow the plant to absorb the active ingredient (Yu et al, 2009).…”

Section: Resultsmentioning

confidence: 94%

Spray solution deposition and Asian rust control in soybean cultivars

Neto

Souza

Júnior

et al. 2021

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

The control of Asian soybean rust depends on fungicide efficacy and the application technology; however, the leaf architecture of soybean cultivars may also interfere in disease control. This study aimed to evaluate Asian rust control and fungicide deposition using spray nozzles in three soybean cultivars. A randomized block design was used, with treatments arranged in a split-plot scheme; the plots were three soybean cultivars (SYN 1561 IPRO, M6410 IPRO, and M6210 IPRO) and the subplots three spray nozzles (11002 BD, AIXR 110015 and TTJ60 11002), in addition to a control with no fungicide application, and four replicates. The volume median diameter, droplet coverage, leaf area index, area under the disease progress curve, 1,000-grain weight and crop yield were evaluated. The 11002BD and AIXR11005 nozzles provided better spray deposition in cultivars with lower leaf area indexes at the R1 phenological stage. Nozzles 11002BD, AIXR110015 and TTJ60 ensured better management of Asian rust than that of the control treatment, regardless of leaf area index. Cultivar SYN1561 obtained the largest grain yield and highest leaf area index in the season with the highest rainfall, regardless of the spray nozzle used.

show abstract

“…Besides using assisted boom sprayer systems, the deposition and coverage of the leaf surface by sprayed chemicals can be maximized by adjusting other factors, such as: the spectrum of the droplets (Silva et al, 2014, Weber et al, 2017França et al, 2018), spray pressure (Cunha et al, 2016), spray nozzle type (Cunha et al, 2014;Madureira et al, 2015;Cunha et al, 2016, Durão & Boller, 2017, adding adjuvants to the spray (Cunha et al, 2014;Madureira et al, 2015;Oliveira et al, 2016), and changing the volume of the mixture (Cunha et al, 2014;Prado et al, 2015;Weber et al, 2017;Roehrig et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

Deposition and Coverage of Soybean Leaf Surfaces by Sprays Applied Using Different Assisted Boom Sprayer Systems

et al. 2019

Self Cite

View full text Add to dashboard Cite

Maintaining homogeneity in the distribution of fungicidal sprays applied throughout the plant, minimizing the variation between the upper and lower third of the plant, is one of the main challenges for application technologies with regard to soybean crops. To increase the deposition and leaf coverage of sprayed compounds, especially in the middle and lower thirds of the plant, we developed and tested alternative assisted boom sprayer systems. In this study, three assisted boom sprayer systems (Vortex ® , Dropleg ® , and chain curtain) were evaluated, in addition to the conventional system, in terms of the deposition and coverage of the leaf surface they achieved in the upper, middle, and lower thirds of plants using the fluorescent tracer Helios SC 500™. The assisted boom sprayer systems allowed the sprayed mixture to be better distributed throughout the plant. With the conventional spray system (without assitance), the deposition in the upper third was approximately 26 times higher than that in the lower third, whereas with the use of the assisted boom sprayer systems, the difference in deposition between these thirds was 11 times higher. Among the evaluated systems, the Dropleg ® system presented the lowest depositional variation, which was only 5.5 times higher in the upper than in the lower third, because of the increased deposition achieved in the lower third of the plant. Leaf coverage varied from 41% to 81% in the upper third, from 24% to 43% in the middle third, and from 4% to 13% in the lower third of the plant. Using the conventional spray system, the leaf surface coverage was approximately 13 times higher in the upper third than in the lower third of the plant, whereas with the use of the assisted boom sprayer systems, especially the Dropleg ® system, this variation was reduced by 73%, and the coverage of the upper and lower thirds only differed by 3.5 times. Indeed, the Dropleg ® system reached a leaf coverage of close to 13% in the lower third of the plant. The use of assisted boom sprayer systems improved the distribution of the mixture applied throughout the plant, reducing the differences among the thirds of the plant both in the levels of deposition and coverage of the leaf surfaces. The Dropleg ® system increased the deposition and leaf coverage in the lower third of the plant the most, facilitating better distribution of the mixture.

show abstract

Spray Nozzles Performance in Fungicides Applications for Asian Soybean Rust Control

Cited by 7 publications

References 6 publications

Estimation of the Optimum Size of Plots for Soybean Radiometer Experiments

Estimation of the Optimum Size of Plots for Soybean Radiometer Experiments

Spray solution deposition and Asian rust control in soybean cultivars

Deposition and Coverage of Soybean Leaf Surfaces by Sprays Applied Using Different Assisted Boom Sprayer Systems

Contact Info

Product

Resources

About