Effect of air blast sprayer application speed on the dye retention of coffee
Palavras-chave:
coffee cultivation, spraying, leaf depositionResumo
Improving the effectiveness of pesticide application for controlling insects, mites, and pathogens in coffee cultivation has been a major challenge for coffee farmers, researchers, and consultants. The present study aimed to assess the deposition and distribution of a brilliant blue tracer in the coffee canopy using Jacto’s Arbus 2000 Super Export EL and Kuhn’s Twiter 2000 air blast sprayers at different application speeds (5 and 7 km h-1). The experiment was conducted using a randomized block design, with a 2 × 2 factorial arrangement (two sprayer models and two application speeds), with six replicates. After spraying, leaves were collected, and the deposition of the tracer was assessed using spectrophotometry. The canopy was divided into lower, middle, and upper heights, and subdivided into external and internal crown positions. The percentage difference in spray deposition between positions was termed relative spray deposition. Spray deposition in the internal crown differed only in the upper third section between sprayers. In the external crown, the application speed affected the deposition of tracer dye for both sprayers, whereas, in the internal crown, the application speed only affected the deposition of tracer dye in the upper crown section only when using the Arbus sprayer.
Referências
Alvarenga CB, Teixeira MM, Cecon PR, Siqueira DL, Sasaki RS & Rodrigues DE (2013) Déficit de pressão de vapor d’água no ar na distribuição de líquido utilizando um pulverizador hidropneumático. Amazonian Journal of Agricultural and Environmental Sciences, 2:81-87.
Campos J, Llop J, Gallart M, García-Ruiz F, Gras A, Salcedo R & Gil E (2019) Development of canopy vigour maps using UAV for sitespecific management during vineyard spraying process. Precision Agriculture, 6:1136-1156.
Chen Y, Ozkan HE, Zhu H, Derksen RC & Krause CR (2013) Spray deposition inside tree canopies from a newly developed variable-rate air-assis ed sprayer. Transactions of the ASABE, 9:1263-1272.
Chen Y, Zhu H & Ozkan HE (2012) Development of a variable-rate sprayer with laser scanning sensor to synchronize spray outputs to tree
structures. Transactions of the ASABE, 3:773-781.
Dou H, Zhang C, Li L, Hao G, Ding B, Gong W & Huang P (2018) Application of variable spray technology in agriculture. IOP Conference Series: Earth and Environmental Science, 186:012007.
Fritz BK, Hoffmann WC, Czaczyk Z, Bagley W, Kruger G & Henry R (2012) Measurement and classification methods using the ASAE S572.1 reference nozzles. Journal of Plant Protection Research, 4:447-457.
Miranda GRB, Raetano CG, Silva VC, Cunha MDQ, Carvalho RH, Pinheiro JM, Gonçalves MP, Reinato CHR, Paiva LC & Araújo D (2012) Avaliação dos depósitos da pulverização em frutos de cafeeiro utilizando dois equipamentos associados a diferentes volumes de calda. Revista Agrogeoambiental, 1:15-20.
Montoya MA, Ambrogetti AO & Del Monte RF (2018) Eficiencia de pulverizadores hidroneumáticos de uso fitosanitario en la fruticultura cuyana (Argentina). Revista de la Facultad de Ciencias Agrarias, 2:343-354.
R Development Core Team (2019) R: A Language and Environment for Statis tical Computing. Vienna, R Foundation for Statistical Computing.
Available at: https://www.R-project.org/. Accessed on: July 27th, 2019.
Ruas RAA, Sichocki D, Dezord LR, Carvalho Filho AG & Good PIV (2015) Proposta de método para inspeção em pulverizadores hidropneumáticos. Coffee Science, 1:76-82.
Salcedo R, Llop J, Campos J, Costas M, Gallart M, Ortega P & Gil E (2020) Evaluation of leaf deposit quality between electrostatic and conventional multi-row sprayers in a trellised vineyard. Crop Protection, 127:01-10.
Salcedo R, Pons P, Llop J, Zaragoza T, Campos J, Ortega P, Gallart M & Gil E (2019) Dynamic evaluation of airflow stream generated by a reverse system o an axial fan sprayer using 3D-ultrasonic anemometers. Effect of canopy structure. Computers and Electronics in Agriculture, 163:01-14.
Santinato F, Ruas RAA, Silva CD, Silva RP, Gonçalves VAR & Souza Júnior JM (2017) Deposição da calda de pulverização em diferentes volumes vegetativos de Coffea arabica L. Coffee Science, 1:69-73.
Sasaki RS, Teixeira MM, Fernandes HC, Monteiro PMB, Rodrigues DE & Alvarenga CB (2013) Parameters of electrostatic spraying and its influence on the application efficiency. Revista Ceres, 4:474-479.
Silva JER, Cunha JPAR & Nomelini QSS (2014) Deposição de calda em folhas de cafeeiro e perdas para o solo com diferentes taxas de aplicação e pontas de pulverização. Revista Brasileira de Engenharia Agrícola e Ambiental, 12:1302-1306.
Souza Júnior JM, Ruas RAA, Duarte LO, Faria VR, Carvalho Filho A & Santos Júnior CR (2017) Influência da densidade foliar na distribuição de calda no dossel do cafeeiro (Coffea arabica L.). Coffee Science, 2:216-222.
Souza Júnior JM, Ruas RAA, Godinho Júnior JD, Carvalho Filho A & Faria VR (2016) Vertical volumetric distribution of an axial fan sprayer on the Brevipal pus phoenicis control. Pesquisa Agropecuária Tropical, 2:183-190.
Zampiroli R, Alvarenga CB, Andaló V, Rinaldi PCNR & Assis GA (2017) Application technology for chemically controlling coffee leaf miner in the cerrado of Minas Gerais State. Revista de Ciências Agrárias, 3:256-262.
Zhai C, Zhao C, Wang N, Long J, Wang X, Weckler PR & Zhang H (2018) Research progress on precision control methods of air-assisted spraying in or chards. Transactions of the Chinese Sciety of Agricultural Engineering, 10:01-15.
Downloads
Publicado
Como Citar
Edição
Seção
Licença
Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.
