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

Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:23:54Z No. of bitstreams: 0Bitstream added on 2014-05-27T14:40:58Z : No. of bitstreams: 1 2-s2.0-79751469114.pdf: 919971 bytes, checksum: 263d0059a3ab5f51658bbe87c33a02d0 (MD5) Made available in DSpace on 2014-05-27T11:23:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-05-01 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 dm3 ha-1), whose application was for the control of the Asian soybean rust. An area of 288 m 2 was used, with a randomized blocks design in a factorial 2×3 with 4 repetitions, total of 24 experimental parcels of 12 m2. For the spraying with hydraulical nozzles a costal spray of constant pressure kept by C02 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 dm3 ha -1 presented greater covering percentage. Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Jaboticabal, SP Colegiado de Engenharia Agrícola e Ambiental Universidade Federal do Vale São Francisco (UNIVASF), Juazeiro - BA Departamento de Fitossanidade Faculdade de Ciências Agrárias e Veterináricas (FCAV) Universidade Estadual Paulista Julio de Mesquita Filho, Campus de Jaboticabal, Jaboticabal - SP, CEP. 14.884-900 Departamento de Fitossanidade Universidade Estadual Paulista Julio de Mesquita Filho, Jaboticabal. SP Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Jaboticabal, SP Departamento de Fitossanidade Faculdade de Ciências Agrárias e Veterináricas (FCAV) Universidade Estadual Paulista Julio de Mesquita Filho, Campus de Jaboticabal, Jaboticabal - SP, CEP. 14.884-900 Departamento de Fitossanidade Universidade Estadual Paulista Julio de Mesquita Filho, Jaboticabal. SP