scholarly journals Droplet Size and Spray Volume Effects on Honey Mesquite Mortality with Clopyralid

1993 ◽  
Vol 46 (3) ◽  
pp. 257 ◽  
Author(s):  
S. G. Whisenant ◽  
L. F. Bouse ◽  
R. A. Crane ◽  
R. W. Bovey
Keyword(s):  
Droplet Size ◽  
Spray Volume ◽  
Honey Mesquite ◽  
Volume Effects

Spray Deposition of Clopyralid on Honey Mesquite (Prosopis glandulosa)

1991 ◽  
Vol 5 (3) ◽  
pp. 499-503 ◽  
Author(s):  
Rodney W. Bovey ◽  
Raymond A. Stermer ◽  
Louis F. Bouse
Keyword(s):  
Gas Chromatography ◽  
Droplet Size ◽  
Laboratory Experiments ◽  
Spray Deposition ◽  
Prosopis Glandulosa ◽  
Spray Droplet ◽  
Spray Solution ◽  
Spray Volume ◽  
Spray Deposit ◽  
Honey Mesquite

Greenhouse and laboratory experiments were conducted to evaluate the influence of clopyralid formulation, spray droplet size, and spray volume on deposit of clopyralid on greenhouse-grown honey mesquite. The addition of surfactant WK at 0.5% (v/v) of the spray solution caused a twofold increase in deposition of spray of the monoethanolamine salt (MEA) of clopyralid but not the oleylamine salt (OLA). There were no differences in spray deposit between spray droplet size spectrums of 160 or 330 μm Dv.5or spray solution applications of 47 or 187 L ha-1. Dye and gas chromatography measurements of spray deposit of clopyralid compared favorably except where surfactant WK was used with the OLA formulation.

scholarly journals Spray volume distribution pattern and droplet size spectrum from ceramic nozzles

2018 ◽  
Vol 22 (11) ◽  
pp. 804-809
Author(s):  
Mateus P. Massola ◽  
Vandoir Holtz ◽  
Marcos P. de O. Martins ◽  
Anderson da S. Umbelino ◽  
Elton F. dos Reis
Keyword(s):  
Experimental Design ◽  
Distribution Pattern ◽  
Droplet Size ◽  
Size Spectrum ◽  
Target Coverage ◽  
Volume Distribution ◽  
Working Pressure ◽  
Median Diameter ◽  
Spray Volume ◽  
Test Table

ABSTRACT Droplet size spectrum and uniformity of spray volume distribution are important parameters for selecting spray nozzles. The objective of this study was to evaluate the average spray volume distribution and droplet size spectrum from ceramic nozzles. The spray volume distribution pattern was evaluated on a test table for hydraulic spray nozzles using spray heights of 0.4, 0.5, 0.6, 0.7, and 0.8 m, and working pressures of 500, 600, and 700 kPa. Computer simulations were used to analyze the spray volume distribution using arrangements of bar heights, working pressures, and spacing between spray nozzles in a bar of 12 m. The droplet size spectrum from the spray nozzles was evaluated using a randomized complete experimental design in a 2 × 3 split-plot arrangement consisting of two types of nozzles (ATR-1.0, and TVI-800075) and three working pressures (500, 600, and 700 kPa), with four replications. The uniformity of spray volume distribution was improved when using ATR-1.0 spray nozzles spaced 0.4 or 0.6 m apart, regardless of the working pressure. Regarding the droplet size spectrum, the volume median diameter decreased with increasing the working pressure for both types of nozzles, reaching 210 μm (ATR-1.0) and 483 μm (TVI-800075). Contrastingly, the percentage of droplets with diameter smaller than 100 μm increased with increasing working pressure; the target coverage presented the same trend, with 8.4% of coverage when using ATR nozzles with working pressure of 700 kPa.

Absorption and Translocation of Glyphosate in Aspen (Populus tremuloidesMichx.) as Influenced by Droplet Size, Droplet Number, and Herbicide Concentration

Weed Science ◽  
1996 ◽  
Vol 44 (3) ◽  
pp. 482-488 ◽  
Author(s):  
Shu Hua Liu ◽  
Robert A. Campbell ◽  
John A. Studens ◽  
Robert G. Wagner
Keyword(s):  
Droplet Size ◽  
Concentration Gradient ◽  
Tissue Injury ◽  
Treated Area ◽  
Primary Mechanism ◽  
Herbicide Concentration ◽  
Spray Volume

When herbicide concentration was constant, absorption of14C-glyphosate increased with increasing droplet size (326 to 977 μm). Amount of14C-glyphosate translocated away from the treated area, expressed as percent of absorbed, increased as droplet size decreased. Herbicide concentration of the droplet was more important than droplet number or droplet size in determining glyphosate absorption and translocation. Absorption and translocation increased with increasing herbicide concentration regardless of whether droplet size or number was altered in conjunction with herbicide concentration. This relationship explained why low spray volume (increased herbicide concentration) increased herbicide efficacy. The concentration gradient between droplet and leaf, rather than droplet coverage, was the primary mechanism responsible for the observed effect. Large droplets caused localized tissue injury, which may have caused decreased translocation.

Influence of Adjuvants on the Deposition, Absorption, and Translocation of Clopyralid in Honey Mesquite (Prosopis glandulosa)

Weed Science ◽  
1987 ◽  
Vol 35 (2) ◽  
pp. 253-258 ◽  
Author(s):  
Rodney W. Bovey ◽  
Hugo Hein ◽  
Robert E. Meyer ◽  
L. Fred Bouse
Keyword(s):  
Liquid Surface ◽  
Prosopis Glandulosa ◽  
Pyridinecarboxylic Acid ◽  
Spray Solution ◽  
Liquid Surface Tension ◽  
Methyl Cyclohexane ◽  
Spray Volume ◽  
Spray Deposit ◽  
Plant Surfaces ◽  
Honey Mesquite

The addition of surfactant (trimethylnonylpolyethoxyethanol) at 0.5% (v/v) of the spray solution caused a twofold increase in the deposit of clopyralid (3,6-dichloro-2-pyridinecarboxylic acid) applied at 0.14 or 0.28 kg ae/ha on greenhouse-grown honey mesquite (Prosopis glandulosaTorr. # PRCJG) and increased transport into the plants compared to clopyralid applied alone. Application of equal rates of benazolin [4-chloro-2-oxo-3(2H)-benzothiazoleacetic acid] with clopyralid at 0.28 + 0.28 kg/ha enhanced transport of clopyralid into honey mesquite. Spray deposit, absorption, and translocation of clopyralid was unaffected by addition of 0.5% (v/v) of d'limonene (4-isopropenyl-1-methyl-cyclohexane). Greater spray deposit of clopyralid on plant surfaces after addition of surfactant was associated with reduced liquid surface tension and greater percentage of spray volume in small droplets (<204-μm diam).

Effect of spray droplet size, spray volume and fungicide on the control of white mold in soybeans

2017 ◽  
Vol 92 ◽  
pp. 190-197 ◽  
Author(s):  
Ayrton Berger-Neto ◽  
David de Souza Jaccoud-Filho ◽  
Carlos Rafael Wutzki ◽  
Hamilton Edemundo Tullio ◽  
Marcelo Luiz Cunha Pierre ◽  
...  
Keyword(s):  
Droplet Size ◽  
White Mold ◽  
Spray Droplet ◽  
Spray Volume
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