CIGR2010-book-abstra..

LIQUID DISTRIBUTION OF AIR INDUCTION AND OFF-CENTER SPRAY NOZZLE
USED TO APPLY AGROCHEMICALS IN SPECIAL CONDITION
R.G. VIANA 1 , J.R. ROSELL 2 , L.R. FERREIRA 1 , F. SOLANELLES 2 , F. GRÀCIA 2
1 R.G. VIANA, Rua PH Holfs SN, Viçosa-Minas Gerais, CEP:36570-000, Brazil, rafaelgomesviana@yahoo.com.br., 1 L.R. FERREIRA,
2
lroberto@ufv.br., J.R. ROSELL, Departament D’Enginyeria Agroforestal, Av. Alcalde Rovira Roure, 191. 25198 Lleida, Spain,
jr.rosell@eagrof.udl.cat., 2 F. SOLANELLES, Generalitat de Catalunya, fsolanelles@gencat.net., 2 F. GRÀCIA, Generalitat de Catalunya,
felipj.gracia@gencat.net.
CSBE100076 – An off-center spray nozzle was utilized in specific conditions, to apply
agrochemicals in plant production, such as positioned at the end of the spray boom, spray products
under the crop leaves and two nozzles combined to apply herbicides in a uniform application over
seedlings or small plants. Technical information regarding this nozzle is needed for the proper
selection. The objective of this study was to evaluate the distribution of air induction and off-center
nozzle AIUB 8502 under different operating conditions. We evaluated the individual profile, spray
nozzle outflow, spray angle, spray width and simulated the distribution profile for two AIUB 8502
nozzles at working pressures of 200, 300, 400 and 500 kPa, heights of 30, 40 and 50 cm from the
target and spacing from 30 to 100 cm. All tests were performed following the ISO 5682-1 with
some adaptations. The nozzle presented an eccentric distribution of liquid with a discontinuous side
and eccentric opposing end, with sharp decrease in the volume of liquid. Increases in the height and
working pressure extended the profile distribution. The largest number of uniform configurations
was obtained at a height of 50 cm, decreasing heights from 40 to 30 cm. The angle and flow rate of
the off-center nozzle increased with the increase in pressure, with no differences between
discontinuous and total angles between 400 and 500 kPa, and 200 and 300 kPa pressure ranges.
EVALUATION OF BACKPACK SPRAYERS FOR HERBICIDE APPLICATION IN A
BRAZILIAN FOREST
R.G. VIANA 1 , M.S. MACHADO 1 , L.R. FERREIRA 1 , A.F.L. MACHADO 2 , G.L. FERREIRA 1 , C.A.D. MELO 1
1 R.G. VIANA, Universidade Federal de Viçosa, Brazil, Departament of Plant Production, rafaelgomesviana@yahoo.com.br, 1 M.S. MACHADO,
Master student of Plant Production Department, milermachado@yahoo.com.br., 1 L.R. FERREIRA, Professor of Plant Production Department,
lroberto@ufv.br., 1 G.L. FERREIRA, Forestry Engineering Student, gisellelima87@yahoo.com.br., 1 C.A.D. MELO, Agronomy Engineering
Student, christiane.melo@ufv.br., 2 A.F.L. MACHADO, Universidade Federal do Tocantins, Brazil, Post doctorate in Plant Production Department,
aroldomachado@yahoo.com.br.
CSBE100077 – The backpack sprayer is the most widely used sprayer for herbicide application in
Brazilian eucalyptus production. However, the maintenance, repair and replacement of parts and
accessories, is a relatively uncommon practice. The objective of this study was to evaluate the
operational conditions of backpack sprayers used for herbicide application in the culture of
eucalyptus. The study was performed in Alagoinhas-Brazil in Copener Forestry/Bahia Pulp. 362
sprayers were evaluated for the following factors: leaks in the tank and spray boom; the presence of
sharp edges; handle condition; presence, absence and position of pressure regulating valve; suitable
clamps to support the spray boom; the spray nozzle conditions; presence and adequacy of the
nozzle filter. The levels of irregularities observed for sharp edges, damaged handles and the lack of
suitable clamps to support the boom at the pump, were 35, 19 and 32% respectively. To spray
nozzles, pressure regulating valve and the nozzle filter the levels of irregularities were 12, 14 and
11% respectively. It is concluded the application of herbicides with the backpack sprayer in
Copener Forestry/Bahia Pulp, presents operational errors, which must be corrected to reduce
possible environmental contaminations, and increase the efficiency of weed control and operator
safety.
32
XVII th World Congress of the International Commission of Agricultural and Biosystems Engineering (CIGR) – Québec City, Canada – June 13-17, 2010