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BIBTEX RIS

Coverage of soybean crop by spraying liquid due nozzles and spraying volume.

2009; UNIVERSIDADE FEDERAL DO PARANÁ; Volume: 10; Issue: 3 Linguagem: Inglês

ISSN

1983-2443

Autores

R. A. A. Román, Jorge Wilson Cortez, Marcelo da Costa Ferreira, J. R. G. di Oliveira,

Tópico(s)

Soil Management and Crop Yield

Resumo

The goal of this research was to evaluate two tips of spraying nozzles (hollow cone nozzle and two flat fan nozzle annexed to a nozzle body DUO) and three spray volumes (100, 150 and 200 dm ha), whose application was for the control of the Asian soybean rust. An area of 288 m was used, with a randomized blocks design in a factorial 2x3 with 4 repetitions, total of 24 experimental parcels of 12 m. For the spraying with hydraulical nozzles a costal spray of constant pressure kept by CO2 compressed with bar of 2 m was used. The analysis of the covering percentage was carried through by means of the use of hidro-sensible paper, that was placed in three position of the plant what it represents, in height, the third superior, average and inferior of the canopy. For both the third no interaction between the evaluated factors, was found and meither difference statistics between the spraying tips and the volumes. In absolute values the twin flat fan nozzle DUO presented minimum difference of covering in relation to the hollow cone nozzle, and for the spray volume of 200 dm ha presented greater covering percentage. Key-words: Spraying technology; flat fan nozzle; hollow cone nozzles; asian soybean rust. 1 Parte da monografia de graduacao em Agronomia do primeiro autor. 2 Engenheiro agronomo, Mestrando em Agronomia – Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Jaboticabal, SP, Brasil. E-mail: rar_agronomia@yahoo.com.br. 3 Engenheiro agronomo, Doutor em Agronomia, Professor do Colegiado de Engenharia Agricola e Ambiental – Universidade Federal do Vale Sao Francisco (UNIVASF), Juazeiro – BA, Brasil. E-mail: jorge.cortez@yahoo.com.br. 4 Engenheiro agronomo, Doutor em Agronomia, Professor do Departamento de Fitossanidade – Faculdade de Ciencias Agrarias e Veterinaricas (FCAV) – Universidade Estadual Paulista Julio de Mesquita Filho Campus de Jaboticabal. Jaboticabal SP, Brasil, CEP. 14.884900 E-mail: mdacosta@fcav.unesp.br. Autor para correspondencia. 5 Engenheiro Agronomo, Doutorando em Agronomia – Departamento de Fitossanidade – Universidade Estadual Paulista Julio de Mesquita Filho, Jaboticabal, SP, Brasil. E-mail: joserodolfoguimaraes@yahoo.com.br. Scientia Agraria ISSN 1519-1125 (printed) and 1983-2443 (on-line)

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