Agricultural Spray Deposit Quantification Methods

Cerqueira, Denise Tourino Rezende de; Raetano, Carlos Gilberto; Pogetto, Màrio Henrique Ferreira do Amaral Dal; Prado, Evandro Pereira; Christovam, R. S.; Serra, Marina; Costa, Susete

doi:10.13031/2013.42474

Cited by 12 publications

(11 citation statements)

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“…Thus, glass slides can be considered as suitable targets for spraying deposition removal since the dye was easily removed, as it has distinct features if compared to the natural targets. Glass slides also present a higher percentage of deposition removal, whether compared to leaves of Phaseolus vulgaris and Brachiaria plantaginea (DE CERQUEIRA et al, 2012). Such difference of deposition removal between natural targets and glass slides is due to glass surface hydrophilicity, i.e.…”

Section: Resultsmentioning

confidence: 99%

“…On the other side, costs may be a limiting factor in conducting studies by using active substances of plant protection products since complex analytical methods are required because of the diversity of molecules, sophisticated equipment, and people trained to carry out the analyses (MATUO, 1988). Thus, the use of markers is very important due to the ease of removal from leaves or collecting targets, in addition to presenting water solubility, low cost, and simple and precise methods for quantification (DE CERQUEIRA et al, 2012;MARCHI et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Brilliant Blue Dye Removal in Fungicide Spraying

et al. 2017

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ABSTRACT:The method used for removal of brilliant blue dye may have an influence in interpreting the results of spraying deposition studies. The aim of this study was to assess the number of washings and water volumes for brilliant blue dye removal from soybean leaflets and glass slides in fungicide sprayings with and without adjuvants. A completely randomized experimental design was used in a 3 × 3 × 2 × 4 factorial scheme. The factors consisted of number of washings (1st, 2nd, and 3rd), water volume (15, 20, and 30 mL), target type (soybean leaflets and glass slides), and spray solutions (fungicide ProdutorBR ® 0.5 L ha −1 without and with the adjuvants vegetable oil Agr'óleo ® 0.5% v v −1 , mineral oil Nimbus ® 0.5% v v −1 , and surfactant Silwet ® 0.04% v v −1 ). Sprayings were carried out by using the nozzle model TT110015 at a pressure of 300 kPa (medium droplets). After spraying, targets were washed and the amount of brilliant blue dye removed per target area was detected by spectrophotometry. Brilliant blue dye removal is higher in glass slide when compared to soybean leaflets. With a single washing, a higher difficulty in removing the brilliant blue dye was observed for fungicide with vegetable oil. Only the first washing and a water volume of 15 mL are insufficient for brilliant blue dye removal from soybean leaflets and glass slides.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Brilliant Blue Dye Removal in Fungicide Spraying

et al. 2017

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“…The spray solutions were prepared by adding trifloxystrobin and prothioconazole (Fox ® ) fungicide at a dose of 0.4 L ha -1 plus Brilliant Blue tracer dye at a dose of 0.0015 kg L -1 in distilled water (Cerqueira et al, 2012). According to Oliveira, Marubayashi, Gandolfo, and Alves (2017), the presence of the fungicide in the spray solution, together with the Brilliant Blue tracer, does not compromise the evaluation of the spray deposit.…”

Section: Sprayingmentioning

confidence: 99%

Effects of news sowing arrangements and air assistance on fungicide spray distribution on soybean crop

et al. 2019

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The density and distribution of soybean plants can interfere in the plant growth stage and yield, as well as phytosanitary management of this crop. Thus, innovations in production systems must be followed by improvements in pesticide application technology. Therefore, this study aimed to evaluate the influence of soybean sowing arrangements on fungicide application technology, with or without air assistance in the spray boom, using qualitative and quantitative assessments of the spray deposits. In the experiments, a randomized block design with split plots was used. Four soybean sowing arrangements: Conventional (CO), Double row (DR), Narrow row (NR), and Crossed rows (CR) composed the main plots, and fungicide application technologies with air assistance (AA) and without air assistance (WA) in the spray boom composed the subplots, with four replications. For the assessment of spray deposits, Brilliant Blue tracer dye was used in the spray solution, and the spray coverage was evaluated using water-sensitive papers. The effects of different soybean sowing arrangements on deposits and spray coverage were limited. However, an increase in spray deposits on the lower part of the soybean plants was observed with air assistance in the spray boom.

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“…According to CERQUEIRA et al (2012), this marker exhibits an extraction coefficient in natural targets of 93% when measured in leaves of Phaseolus vulgaris and Brachiaria plantaginea. After the spraying and drying, the central planter was isolated by carefully removing the planters at the two ends.…”

Section: Quantification Of the Spray Depositmentioning

confidence: 99%

Construction and Practical Application of a Canopy Opener Device

Prado

Pogetto²,

Cerqueira

et al. 2016

Eng. Agríc.

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Accurate application of pesticides is difficult for crops with dense leaves, such as soybean crops. To improve spray deposits on the lower leaves of soybean plants, the aim of this study is to build a canopy opener (CO) from a previously developed prototype and to assess its practical application and efficiency on soybean crops. Laboratory experiments were conducted to determine the amount of spray deposits on the top and the lower leaves using a Brilliant Blue dye. The influence of the CO device on the number of flowers knocked down during spraying was also investigated. The data showed that the use of the CO attached to the spray boom enabled more spray deposits on the lower leaves and less spray deposits on the upper leaves compared with conventional spraying. The CO device did not influence the falling of flowers or the damage to the soybean plants. The construction of the CO device proved to be a feasible alternative, which could be used primarily by small-scale soybean producers, with the goal of obtaining larger spray deposits on the lower leaves of soybean plants.

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Agricultural Spray Deposit Quantification Methods

Cited by 12 publications

References 0 publications

Brilliant Blue Dye Removal in Fungicide Spraying

Brilliant Blue Dye Removal in Fungicide Spraying

Effects of news sowing arrangements and air assistance on fungicide spray distribution on soybean crop

Construction and Practical Application of a Canopy Opener Device

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