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| Assunção,Heli H. T. de; Silva,Sérgio M.; Alves,Guilherme S.; Zandonadi,Cesar H. S.; Cunha,João P. A. R. da. |
| ABSTRACT 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Application rate; Droplet electrification; Application technology; Microsphaera diffusa. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000600721 |
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| Cunha,João P. A. R. da; Reis,Elton F. dos; Assunção,Heli H. T. de; Landim,Thiago N.. |
| ABSTRACT 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Application technology; Droplet size; Water-sensitive paper; Laser diffraction. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000400476 |
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| Assunção,Heli H. T. de; Cunha,João P. A. R. da; Silva,Sérgio M.; Alves,Guilherme S.; Lemes,Ernane M.. |
| ABSTRACT It is a well-known fact that the application of pesticides can be improved using an electrostatic spray due to the reduction of the application rate and increase in deposition on plant targets. However, little information exists on the use of such technology in maize crops. Thus, this study is aimed to evaluate the spray deposition on maize resulting from spray application using an electrostatic sprayer in combination with low application rates and different spray compositions. A field experiment was conducted in a randomized block having a 2×2×2 factorial design with two application rates (95 and 52 L ha-1), with or without the spray electrification, and with or without the synthetic adjuvant. The droplet electrification ability, interference of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Application rate; Electrified droplet; Spray technology; Spray deposition. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000400503 |
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