Results 151 to 160 of about 54,865 (201)

Shields to Reduce Spray Drift

Journal of Agricultural Engineering Research, 1997
Abstract The effects of several spray-boom shield designs and ‘‘low-drift ’’ nozzles on spray drift are presented. Results are based on experiments conducted in a wind tunnel. Performances of all experimental shields were evaluated under two spray pressures (0·15 and 0·3 MPa), and two air velocities (2·75 and 4·80 m/s) in the wind tunnel.
Ozkan, H.E., Miralles, A., Sinfort, C., Zhu, D., Fox, R.D.   +4 more
openaire   +2 more sources

Spray Drift Mitigation with Spray Mix Adjuvants

Applied Engineering in Agriculture, 2008
Numerous drift reduction adjuvants and spray deposition aids are available to applicators of crop production and protection chemicals. Performance of many of the newly introduced drift control adjuvants has not been well documented for aerial application.
null Y. Lan, null W. C. Hoffmann, null B. K. Fritz, null D. E. Martin, null J. D. Lopez, null Jr.   +5 more
openaire   +1 more source

Drift of 10 herbicides after tractor spray application. 2. Primary drift (droplet drift)

Chemosphere, 2006
In the present study the primary drift of 10 herbicides was investigated in five field experiments, and the amount deposited per surface area was quantified outside the application area using simple passive dosimeters. In addition, samples for measuring a possible background value were taken upwind of the sprayed field.
Carlsen, S.C.K., Spliid, N. H., Svensmark, Bo   +2 more
openaire   +3 more sources

REAL TIME SPRAY DRIFT PREDICTION

Acta Horticulturae, 2001
The production of plant based food products inevitably involves pest and disease management. The usual method is spray application of fungicides and insecticides, but increasingly the risks from off site movement of pesticides as spray drift are becoming unacceptable. Considerable effort has gone into modelling the spray drift process.
J. Maber, P. Dewar, J.P. Praat, A.J. Hewitt   +3 more
openaire   +1 more source

PREDICTING GROUND BOOM SPRAY DRIFT

Transactions of the ASAE, 2000
Multiple regression procedures were used to develop models to predict spray drift from ground, boom sprayers. These models were developed to study the effect of independent variables on drift deposits. The Missouri model was developed from single nozzle tests and contained six significant variables. Spray drift deposits were most strongly related to
null D. B. Smith, null L. E. Bode, null P. D. Gerard   +2 more
openaire   +1 more source

The agricultural dispersal-valley drift spray drift modeling system compared with pesticide drift data

Environmental Toxicology and Chemistry, 2002
Abstract The coupling of the valley drift (VALDRIFT) atmospheric dispersion/deposition model with the agricultural dispersal (AGDISP) aircraft wake model generates a modeling system for predicting the off-target drift of pesticides sprayed in a mountain valley.
K Jerry, Allwine, Harold W, Thistle, Milton E, Teske, John, Anhold   +3 more
openaire   +2 more sources

Effect of Drift Retardant Chemicals on Spray Drift, Droplet Size and Spray Pattern

1993
Specific objectives of this study were to determine the effects of various drift retardant chemicals (Direct, Driftgard, Formula 358, Nalco-trol, and Target) on droplet size, spray pattern, and spray drift reduction. The results of this study indicated that, at recommended rates, Nalco-trol provided the largest increase in volume median diameters of ...
HE Ozkan, DL Reichard, H Zhu, KD Ackerman   +3 more
openaire   +1 more source

Spray Drift Exposure Assessment

1983
The Pesticide Registration Guidelines and certain regulations governing the application of pesticides under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) have undergone changes in recent years. In the area of spray drift evaluation, the U.S.
openaire   +1 more source

A simple probabilistic estimation of spray drift—factors determining spray drift and development of a model

Environmental Toxicology and Chemistry, 2008
Abstract Spray drift represents a major mode of exposure in off-crop habitats or surface waters after pesticide spray application. Currently, the estimation of exposure by spray drift is based on a deterministic estimation of the amount of drifting residues, either with the use of default drift values or deterministic models, which ...
Magnus, Wang, Dirk, Rautmann
openaire   +2 more sources

Drift Spraying for Vegetation Baiting

Bulletin of Entomological Research, 1959
The term drift spraying denotes a method of applying an insecticidal spray whereby it is released at a height above the ground and allowed to drift with the wind while it gradually sinks; if the source of emission is moved in a line across the direction of the wind, insecticide will be deposited at a distance downwind of that line.
openaire   +1 more source