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EPTC Reduces Alfalfa (Medicago sativa) Tolerance to Bromoxynil

Published online by Cambridge University Press:  12 June 2017

Robert G. Hartzler
Robert G. Hartzler*
Affiliation:
Dep. Agron., Penn. State Univ., University Park, PA 16802
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Abstract

EPTC applied at the time of ‘Saranac AR’ alfalfa establishment resulted in higher levels of crop injury from the octanoic acid ester of bromoxynil applied postemergence compared to alfalfa in areas not treated with EPTC. EPTC applied at 1.7 or 3.4 kg ai ha-1 did not injure alfalfa. At Rock Springs, PA, 0.54 kg ai ha-1 bromoxynil caused 28, 43, and 55% foliar injury in areas treated with 0, 1.7, and 3.4 kg ai ha-1 EPTC, respectively. A similar interaction was observed at Landisville, PA, although the level of injury due to bromoxynil was less severe. EPTC also predisposed ‘WL 316’ alfalfa to bromoxynil injury in greenhouse experiments.

Keywords

Bromoxynil, 3,5-dibromo-4-hydroxybenzonitrileEPTC, S-ethyl dipropylcarbamothioatealfalfa, Medicago sativa L.Herbicide interactionsherbicide injury
Type
Note
Information
Weed Technology , Volume 5 , Issue 3 , September 1991 , pp. 632 - 634
Copyright
Copyright © 1991 Weed Science Society of America 

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References

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