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Preventing Downy Brome (Bromus tectorum) Seed Production with DPX-Y6202 and Fluazifop

Published online by Cambridge University Press:  12 June 2017

Jesse M. Richardson ,
David R. Gealy  and
Larry A. Morrow
Jesse M. Richardson
Affiliation:
Dep. Agron. and Soils, Washington State Univ., Pullman, WA 99164
David R. Gealy
Affiliation:
Dep. Agron. and Soils, Washington State Univ., Pullman, WA 99164
Larry A. Morrow
Affiliation:
Dep. Agron. and Soils, Washington State Univ., Pullman, WA 99164
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Abstract

Ethyl ester of DPX-Y6202 {2-[4-[(6-chloro-2-quinoxalinyl)oxy] phenoxy] propanoic acid} and butyl ester of fluazifop {(±)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acid} applied during the reproductive phase of development at 0.07 and 0.28 kg ai/ha prevented seed formation in downy brome (Bromus tectorum L. # BROTE). Fluazifop prevented seed formation over a wider range of application rates and growth stages than did DPX-Y6202. Seed production was prevented most readily by herbicide applications made early in the reproductive phase. Environmental factors during reproduction affected herbicide performance. Foliar absorption and translocation of 14C-fluazifop into the developing spikelets was greater than that of 14C-DPX-Y6202 in downy brome.

Keywords

Translocationseed developmentgerminationBROTE
Type
Weed Control and Herbicide Technolgy
Information
Weed Science , Volume 35 , Issue 2 , March 1987 , pp. 277 - 281
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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