Spray Drift and Caterpillar and Stink Bug Control From Aerial Applications With Electrostatic Charge and Atomizer on Soybean Crop

Cunha, João Paulo Arantes Rodrigues da; Barizon, Robson Rólland Monticelli; Ferracini, V. L.; Assalin, Márcia Regina

doi:10.1590/1809-4430-eng.agric.v37n6p1163-1170/2017

Cited by 5 publications

(5 citation statements)

References 17 publications

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“…The analysis using water-sensitive paper (76 x 26 mm) (Syngenta, Basel, Switzerland) was carried out at the Laboratory of Agricultural Mechanization (LAMEC), linked to the Institute of Agricultural Sciences of the Federal University of Uberlândia (ICIAG-UFU), similarly to Cunha et al (2017). For this, six papers were placed on a flat, dry surface aligned at the center of the sprayed jet.…”

Section: Rs =mentioning

confidence: 99%

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Evaluation of Droplet Spectra of the Spray Tip Ad 11002 Using Different Techniques

Cunha¹,

Reis

Assunção

et al. 2019

Eng. Agríc.

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Knowledge of droplet spectra generated by spray nozzle tips is important to ensure the quality of applications of plant protection products. However, there are different methods for this evaluation, which can cause difficulty in interpreting the results. This study aimed to evaluate the droplet spectra produced by the flat fan spray tip AD 11002 operated under different pressures and using different techniques and equipment. The volume median diameter (VMD), percentage of spray volume in droplets smaller than 100 µm diameter and relative spam (RS), considering pressures of 200, 300, and 400 kPa were determined using two direct measurement equipment (Spraytec and Shadow Sizer), based on laser diffraction and image analysis, respectively, and a measure based on indirect analysis, through the digitization of water-sensitive paper. Thus, the use of different analysis techniques led to variations of the analyzed parameters. Among the direct measurement equipment, a difference of up to 58% was observed in VMD. The use of water-sensitive paper to characterize droplet spectra must be carried out with great discretion because there is an underestimation of fine droplets. Pressure variations of 200 to 400 kPa did not influence VMD and RS.

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Section: Rs =mentioning

confidence: 99%

“…Application technology of plant protection products is determinant for the success of crops. Phytosanitary control, based on plant protection products, depends not only on product effectiveness but also on the correct mode of application (Sasaki et al, 2016;Cunha et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Droplet Spectra of the Spray Tip Ad 11002 Using Different Techniques

Cunha¹,

Reis

Assunção

et al. 2019

Eng. Agríc.

Self Cite

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“…For this, alternative technologies have been used in the field. Among alternative application technologies used in the field to reduce carrier volumes, electrostatic spraying has been studied by some researchers (Cerqueira et al, 2017;Cunha et al, 2017a). Droplet electrification can increase spray deposition on targets and consequently pesticide efficacy at lower application rates when compared to conventional methods (Patel et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Electrostatic Spraying Effect on Spray Deposition and Powdery Mildew Control in Soybean

et al. 2019

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Electrostatic spray can bring benefits to the pesticide application such as the reduction of application rate and the increase of deposits on targets. Therefore, this study aimed to evaluate the effect of electrostatic spraying using lower application rates and different adjuvants on soybean spray deposition and chemical control of powdery mildew (Microsphaera diffusa Cooke & Peck). The field experiment was conducted in duplicate. A randomized complete block design with four replications in a 2 × 2 × 2 + 1 factorial scheme was used. The factors were two application rates, with and without droplet electrification, two spray solution compositions, and one additional treatment. Deposition on upper and lower leaves, spray loss to the soil, and powdery mildew control effectiveness were evaluated. The electrical conductivity of the spray solution and the charge/mass ratio induced in droplets were also evaluated. All treatments reduced the soybean powdery mildew severity. Electrostatic spraying responded positively to an increase in the electrical conductivity of the spray solution regarding the charge/mass ratio, but it did not increase spray deposition on the lower third of the canopy and did not influence spray loss to the soil, which was higher as the application rate increased.

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“…These results show that producers should avoid choosing the angle of 45° for the sprayer displacement. Several studies have worked with droplet size (Stoletniy et al, 2014), use of adjuvants (Tormen et al, 2012), types of spray tips, and plant architectures (Debortoli et al, 2012;Cunha et al, 2017) as factors that influence droplet distribution. However, sprayer displacement in relation to crop rows is often not taken into account and placed as an uninfluenced factor of results on pesticide application quality.…”

Section: Resultsmentioning

confidence: 99%

Droplet Distribution as a Function of Cotton Interrow Spacing and Angles of Sprayer Displacement

et al. 2018

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Application technology factors may be influenced by changes in plant architecture, such as height and leaf area. This study aimed to evaluate which angle of sprayer displacement in the application of pesticides in relation to the direction of cotton sowing, cultivated in the ultra-narrow row, narrow row, and conventional systems, provides the best application quality characteristics in the different thirds of plants. The experiment was installed in a split-plot design with four replications in the 3 × 4 factorial scheme, composed of three cotton cultivation systems and four angles of sprayer displacement in relation to the direction of the sowing rows. The evaluated characteristics were mean volumetric diameter, density and coverage of droplets, number of droplets, and open area in the interrows without leaf. The upper third presented the highest values of mean volumetric diameter, number of droplets, and density and coverage of droplets for all interrow spacing and application angles. The angle of displacement of 30° in relation to the sowing row presented the best results in relation to the number and density of droplets. The spacing of 0.90 m in the interrows increased the number of droplets, droplet density, and coverage in the lower third of plants.

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Spray Drift and Caterpillar and Stink Bug Control From Aerial Applications With Electrostatic Charge and Atomizer on Soybean Crop

Cited by 5 publications

References 17 publications

Evaluation of Droplet Spectra of the Spray Tip Ad 11002 Using Different Techniques

Evaluation of Droplet Spectra of the Spray Tip Ad 11002 Using Different Techniques

Electrostatic Spraying Effect on Spray Deposition and Powdery Mildew Control in Soybean

Droplet Distribution as a Function of Cotton Interrow Spacing and Angles of Sprayer Displacement

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