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| ALMEIDA,D.P.; AGOSTINI,A.R.; YAMAUCHI,A.K.; DECARO JR.,S.T.; FERREIRA,M.C.. |
| The objective of this study was to evaluate the efficiency of application and the efficacy of control of water hyacinth (Eichhornia crassipes) with the use of the diquat herbicide done with two application volumes associated to three droplets classes. Three experiments were conducted; in the first, the application efficiency was evaluated; in the second, the control efficiency and; in the third, the droplet spectrum. They were conducted in a completely randomized design with five, four and six replicates, respectively. The treatments were arranged in a 2 x 3 factorial design, with two application volumes (100 and 200 L ha-1) and three droplets classes (fine, extremely coarse and ultra-coarse) to the first and second experiment and the third comprised two... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Spray volume; Volume median diameter; Chemical control of aquatic plants. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100171 |
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| Massola,Mateus P.; Holtz,Vandoir; Martins,Marcos P. de O.; Umbelino,Anderson da S.; Reis,Elton F. dos. |
| ABSTRACT Droplet size spectrum and uniformity of spray volume distribution are important parameters for selecting spray nozzles. The objective of this study was to evaluate the average spray volume distribution and droplet size spectrum from ceramic nozzles. The spray volume distribution pattern was evaluated on a test table for hydraulic spray nozzles using spray heights of 0.4, 0.5, 0.6, 0.7, and 0.8 m, and working pressures of 500, 600, and 700 kPa. Computer simulations were used to analyze the spray volume distribution using arrangements of bar heights, working pressures, and spacing between spray nozzles in a bar of 12 m. The droplet size spectrum from the spray nozzles was evaluated using a randomized complete experimental design in a 2 × 3... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Homogeneous distribution; Volume median diameter; Hydraulic spraying. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001100804 |
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