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Effect of Steam Application on Cropland Weeds

Published online by Cambridge University Press:  20 January 2017

Robert L. Kolberg  and
Lori J. Wiles
Robert L. Kolberg*
Affiliation:
USDA-ARS, 1500 N. Central Avenue, Sidney, MT 59270
Lori J. Wiles
Affiliation:
USDA-ARS, AERC, Colorado State University, Fort Collins, CO 80523
*
Corresponding author's E-mail: rkolbert@sidney.ars.usda.gov.
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Abstract

Plot-scale field studies were conducted to evaluate the efficacy of steam for the control of cropland weeds in comparison with common herbicides. Weed densities, biomass, or emergence after treatment were measured. Steam (3,200 kg/ha, energy dosage equivalent to 890 kJ/m2, speed of 0.8 m/s) and glyphosate (560 g ai/ha) gave similar control (> 90%) of seedling common lambsquarters and seedling redroot pigweed. Applied at heading, steam was comparable to glyphosate in reducing green foxtail biomass at heading 2 wk after application. Steam applied at a rate of 3,200 kg/ha significantly reduced weed biomass (mixed stand, treated at seedling stage) 9 wk after application compared with the control, whereas steam applied at a rate of 1,600 kg/ha (1.6 m/s) did not. Biomass of downy brome treated with steam was reduced more at anthesis than at the seedling growth stage. Emergence of common lambsquarters, redroot pigweed, and black nightshade was not affected by steam application. Amount of steam applied, weed species, and growth stage are key factors in determining control effectiveness.

Keywords

Glyphosateblack nightshade, Solanum nigrum L. #3 SOLNIdowny brome, Bromus tectorum L. # BROTEcommon lambsquarters, Chenopodium album L. # CHEALgreen foxtail, Setaria viridis L. # SETVIredroot pigweed, Amaranthus retroflexus L. # AMAREKochia scoparia L. SchradKOCSCparaquatpelargonic acidSALIBSalsola iberica Sennen & Pau
Type
Research
Information
Weed Technology , Volume 16 , Issue 1 , March 2002 , pp. 43 - 49
Copyright
Copyright © Weed Science Society of America 

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References

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