Evaluating Drift Control Agents to Reduce Short Distance Movement and Effect on Herbicide Performance

Spray drift to unintended areas is more of a concern as applications of nonselective herbicides associated with herbicide-resistant crops and the proximity of residential land to agricultural land increase. This research evaluated the benefit of three commercial drift control agents for effectivenes...

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Bibliographic Details
Published in:Weed technology 2005, Vol.19 (1), p.78-85
Main Authors: Vangessel, M.J, Johnson, Q.R
Format: Article
Language:English
Subjects:
additives
adverse effects
agricultural land
bioassays
Biological and medical sciences
Chemical control
Crops
Fundamental and applied biological sciences. Psychology
glyphosate
grain sorghum
Herbicides
nontarget organisms
Nozzles
Parasitic plants. Weeds
pesticide formulations
Phytopathology. Animal pests. Plant and forest protection
Plants
Sorghum
Sorghum bicolor
Soybeans
Spray drift
Spray nozzles
Weed control
Weeds
wind speed
Wind velocity
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Summary:Spray drift to unintended areas is more of a concern as applications of nonselective herbicides associated with herbicide-resistant crops and the proximity of residential land to agricultural land increase. This research evaluated the benefit of three commercial drift control agents for effectiveness in reducing drift in 19 to 24 km/h wind and their potential effect on weed control. The drift control agents were added to a spray mixture of glyphosate at 0.8 kg ae/ha applied in 140 L/ha and applied with either flat-fan or flood nozzles. None of the drift control agents reduced drift compared with the spray mixture without drift control agent over a distance of 6 m, as measured by water-sensitive cards or grain sorghum bioassay, regardless of nozzle type used. In a separate study, drift control agents did not reduce the weed control of glyphosate or acifluorfen.
ISSN:0890-037X
1550-2740
DOI:10.1614/WT-03-248R