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Comparison of Spray Drift During Postemergence Herbicide Applications to Turfgrass

Published online by Cambridge University Press:  12 June 2017

Harlene Hatterman-Valenti ,
Micheal D. K. Owen  and
Nick E. Christians
Harlene Hatterman-Valenti
Affiliation:
Dep. Agron., Dep. Agron. and Hortic. Dep., Iowa State Univ., Ames, IA 50011
Micheal D. K. Owen
Affiliation:
Dep. Agron., Dep. Agron. and Hortic. Dep., Iowa State Univ., Ames, IA 50011
Nick E. Christians
Affiliation:
Dep. Agron., Dep. Agron. and Hortic. Dep., Iowa State Univ., Ames, IA 50011
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Abstract

Field tests showed that the lawn spray-gun with a 4 gpm lawn tip reduced the percentage of application volume deposited 90 cm to 210 cm downwind from the spray swath edge when compared with XR8004 flat-fan or RA-6 wide angle hollow cone applications at wind speeds between 4.7 and 14.4 km/h. The percentage of applied volume collected at 210 cm downwind from the XR8004 flat-fan applications was 5 and 16 times greater than the percentage from the RA-6 Raindrop nozzle and lawn spray-gun applications, respectively. Visible injury alone with height increases and fresh weights from tomato plants located downwind from the applications concur with spray-drift data for all nozzle types. Triclopyr injury decreased as the distance from the swath edge increased. All tomato plants located downwind up to 210 cm from the XR8004 flat-fan applications were visibly injured (15 to 40%); whereas, only plants less than 150 cm downwind from the RA-6 Raindrop applications and less than 90 cm downwind from the lawn spray-gun applications were injured (2 to 8%).

Keywords

Triclopyr, [(3,5,6-trichloro-2-pyridinyl)oxy]acetic acidtomato (Lycopersicon esculentum Mill.)Flat-fan nozzleslawn spray-gunnon-target injuryraindrop nozzlestriclopyr
Type
Research
Information
Weed Technology , Volume 9 , Issue 2 , June 1995 , pp. 321 - 325
Copyright
Copyright © 1995 by the Weed Science Society of America 

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References

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