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Effects of Thiazopyr and Trifluralin on Dodder (Cuscuta indecora) in Alfalfa (Medicago sativa)

Published online by Cambridge University Press:  12 June 2017

David W. Cudney ,
Steve B. Orloff  and
Darleen A. Demason
David W. Cudney
Affiliation:
Dep. Bot. Plant Sci., Univ. California, Riverside, CA 92521
Steve B. Orloff
Affiliation:
Siskiyou Co., 1655 S. Main St., Yreka, CA 96097
Darleen A. Demason
Affiliation:
Dep. Bot. Plant Sci., Univ. California, Riverside, CA 92521
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Abstract

Trifluralin selectively controls dodder in alfalfa. However, its soil activity dissipates allowing some late season dodder germination. Thiazopyr applied PRE was also found to control dodder selectively in alfalfa. Thiazopyr was more effective when applied in February than in November. Thiazopyr did not control dodder longer into the season than trifluralin in field tests, however it was more effective in greenhouse experiments. The effect of thiazopyr on dodder shoot tips was similar to that of trifluralin, in that both herbicides produced bulbous cells with thickened, globular nuclei, typical of cells treated with herbicides affecting microtubules.

Keywords

Thiazopyr, methyl 2-(difluoromethyl)-5-(4,5-dihydro-2-thiazolyl)-4-(2-methylpropyl)-6-(trifluoromethyl)-3-pyridinecarboxylatetrifluralin, 2,6-dinitro-N,N-dipropyl-4-(trifluoromethyl)benzenaminelargeseed dodder, Cuscuta indecora Choisy # CVCINalfalfa, Medicago sativa L.Herbicidemitosisparasitic weeds
Type
Research
Information
Weed Technology , Volume 7 , Issue 4 , December 1993 , pp. 860 - 864
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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