Spray adjuvant characteristics affecting agricultural spraying drift

OLIVEIRA, RONE B. DE; ANTUNIASSI, ULISSES R.; GANDOLFO, MARCO A.

doi:10.1590/1809-4430-Eng.Agric.v35n1p109-116/2015

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Scientific Papers • Eng. agríc. 35 (1) • jan-feb 2015 • https://doi.org/10.1590/1809-4430-Eng.Agric.v35n1p109-116/2015 copy

Spray adjuvant characteristics affecting agricultural spraying drift

Características dos adjuvantes que influenciam na deriva de pulverizações agrícolas

Authorship SCIMAGO INSTITUTIONS RANKINGS

This study defined the main adjuvant characteristics that may influence or help to understand drift formation process in the agricultural spraying. It was evaluated 33 aqueous solutions from combinations of various adjuvants and concentrations. Then, drifting was quantified by means of wind tunnel; and variables such as percentage of droplets smaller than 50 μm (V50), 100 μm (V100), diameter of mean volume (DMV), droplet diameter composing 10% of the sprayed volume (DV_0.1), viscosity, density and surface tension. Assays were performed in triplicate, using Teejet XR8003 flat fan nozzles at 200 kPa (medium size droplets). Spray solutions were stained with Brilliant Blue Dye at 0.6% (m/ v). DMV, V100, viscosity cause most influence on drift hazardous. Adjuvant characteristics and respective methods of evaluation have applicability in drift risk by agricultural spray adjuvants.

droplet size; wind tunnel; experimental methods; correlations; multivariate analysis

Treatments^1/	Main Component	Concentration (v v^-1 and m v^-1)
T1 – Water	Distilled water	100%
T2 and T3 - AgBem®	Synthetic emulsified resin 387 g L^-1; Anionic surfactant 129 g L^-1	0.05% and 0.10%
T4 and T5 - Agral®	Nonylphenoxypoly Ethanol 200 g L^-1	0.10% and 0.20%
T6 - Agrex Oil®	Fatty acid esters and glycerol 930 mL L^-1	10.00%
T7 - Agro’ óleo®	Fatty acid esters 892 g L^-1	5.00%
T8 and T9 - Antideriva®	Nonylphenol ethoxylate	0.05% and 0.10%
T10 - Break Thru®	Polyether-polymethyl-siloxane copolymer 100%	0.10%
T11 and T12 - Define®	Vegetal polymer	0.06% and 0.12%
T13, T14 and T15 - Grip®	Synthetic latex and organosilicone surfactant fluid 450 g L^-1 Primary aliphatic oxyalkylated alcohol 100 g L^-1	0.165%, 0.30 and 0.60%
T16 - Haiten®	Polyoxyethylene alkylphenol ether 200 g L^-1	0.10%
T17 and T18 - In-Tec®	Nonylphenol ethoxylate 124.4 g L^-1	0.05% and 0.10%
T19 - Joint Oil®	Aliphatic and aromatic hydrocarbons 761 g L^-1	0.10%
T20 and T21 – Li700®	Mix of phosphatidylcholine and propionic acid 712.88 g L^-1	0.50% and 1.0%
T22 - Li700® + Nimbus®	Aliphatic hydrocarbons 428 g L^-1 +Mix of phosphatidylcholine and propionic acid 712.88 g L^-1	0.25%
T23 and T24 - Nimbus®	Aliphatic hydrocarbons 428 g L^-1	0.50% and 1.0%
T25 and T26 - Nutrifix®	Sodium dodecylbenzene sulphonate 30 g L^-1; Carboxymethylcellulose 30 g L^-1	0.05% and 0.10%
T27 and T28 - Silwet®	Polyester Copolymer and silicone 1000 g L^-1	0.10% and 0.20%
T29 and T30 - TA35®	Sodium lauryl ether sulfate, surfactants and builders	0.06% and 0.20%
T31 and T32 - Tac-Tic®	Synthetic latex and organosilicone surfactant fluid 450 g L^-1 Primary aliphatic oxyalkylated alcohol 100 g L^-1	0.13% and 0.26%
T33 - Veget Oil®	Fatty acid esters 930 g L^-1 and Emulsifier 70 g L^-1	1.00%

Variables	ST¹	Density	Viscosity	DMV	V50	V100	DV_0.1
ST¹	-	0.15	0.53*	0.31*	-0.44*	-0.40*	0.41*
Density	0.15	-	0.31*	0.32*	-0.02	-0.26*	0.25*
Viscosity	0.53*	0.31*	-	0.67*	-0.21*	-0.48*	0.50*
DMV	0.31*	0.32*	0.67*	-	-0.26*	-0.84*	0.86*
V50	-0.44*	-0.02	-0.21*	-0.26*	-	0.53*	-0.57*
V100	-0.40*	-0.26*	-0.48*	-0.84*	0.53*	-	-0.95*
DV_0.1	0.41*	0.25*	0.50*	0.86*	-0.57*	-0.95*	-

Associação Brasileira de Engenharia Agrícola SBEA - Associação Brasileira de Engenharia Agrícola, Departamento de Engenharia e Ciências Exatas FCAV/UNESP, Prof. Paulo Donato Castellane, km 5, 14884.900 | Jaboticabal - SP, Tel./Fax: +55 16 3209 7619 - Jaboticabal - SP - Brazil
E-mail: revistasbea@sbea.org.br

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[TFN1] ^1/ Composition quote does not indicate authors’ recommendation and approval.