Skip to Main Content
Skip Nav Destination
ASTM Selected Technical Papers
Pesticide Formulations and Application Systems: Eleventh Volume
By
LE Bode
LE Bode
editor
1
University of Illinois
,
Urbana, IL 61801
Search for other works by this author on:
DG Chasin
DG Chasin
editor
Search for other works by this author on:
ISBN-10:
0-8031-1414-1
ISBN:
978-0-8031-1414-2
No. of Pages:
303
Publisher:
ASTM International
Publication date:
1992

The effects on the atomization process with respect to droplet spectra were investigated for three pump systems (a rotary vane pump, a piston pump, and a diaphragm pump) and compared with an air pressure system. The test substances evaluated were water, Ortho X-77 (0.0625% and 0.5%), Windfall and Nalcotrol polymers, and two placebo (blank) insecticides (an emulsifiable concentrate and a wettable powder). All formulations were tested at field rates. All work was done using a TeeJet XR8004VS flat fan nozzle, and a Hardi 1553-12 hollow cone nozzle with a grey swirl. The effect of recirculation of the formulations on the eventual droplet spectra was also investigated. All other spraying parameters were kept constant. Droplet spectra were assessed along the long axis of the spray pattern using an Aerometrics PDPA-100 system, and a Velmex “Unislide” xyz-positioner.

Results indicate that droplet spectra of formulations containing polymers shift significantly with time of recirculation: Dv0.5 decreased by as much as 300 μm for Nalcotrol. The time taken for the Dv0.5 to stabilize depended upon pump type. Water, Ortho X-77, and the two blank formulations remained unaffected by pump type or recirculation. The effect of different mixing regimes prior to atomization was also investigated for Windfall and Nalcotrol.

1.
Rogiers
L.M.
and
Bognolo
G.
, “
Use of Polymeric Surfactants In Novel Pesticide Formulations Such as Concentrated Emulsions, Suspo-Emulsions and Multiple Emulsions
.” Pesticide Formulations and Application Systems: 11th Volume, ASTM STP 1112,
Chasin
David G
and
Bode
Loren E.
, Eds.,
American Society of Testing and Materials
,
Philadelphia
,
1991
.
2.
Lochhead
R.Y.
and
Dodwell
R.C.
, “
Polymeric Emulsifiers — A Viable Environmental Alternative for Emulsification of Pesticide Active Ingredients
.” Pesticide Formulations and Application Systems: 11th Volume, ASTM STP 1112,
Chasin
David G
and
Bode
Loren E.
, Eds.,
American Society of Testing and Materials
,
Philadelphia
,
1991
.
3.
Bouse
L.F.
,
Carlton
J.B.
, and
Jank
P.C.
, “
Effect of Water Soluble Polymers on Spray Droplet Size
.”
American Society of Agricultural Engineers
, Vol.
31
(
6
),
1988
, pp. 1633–1648.
4.
Young
B.W.
, “
A Device for the Controlled Production and Placement of Individual Droplets
.” Pesticide Formulations and Application Systems: Fifth Volume, ASTM STP 915,
Spicer
L.D.
and
Taneko
T.M.
, Eds.,
American Society for Testing and Materials
,
Philadelphia
,
1986
, pp. 13–22.
5.
May
K.R.
, “
The Measurement of Airborne Droplets by the Magnesium Oxide Method
.”
J. Sci. Inst.
 0950-7671, Vol
27
,
05
1950
, pp. 128–130.
This content is only available via PDF.
You do not currently have access to this chapter.
Close Modal

or Create an Account

Close Modal
Close Modal