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Synergistic Mixes of DPX-A7881 and Clopyralid in Canola (Brassica napus)

Published online by Cambridge University Press:  12 June 2017

Robert E. Blackshaw
Robert E. Blackshaw*
Affiliation:
Agric. Canada Res. Stn., Lethbridge, AB, Canada T1J 4B1
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Abstract

The interaction of DPX-A7881 and clopyralid applied as tank mixtures was studied under controlled environment and field conditions on several commonly occurring weeds in canola. Control of wild mustard and wild buckwheat was not affected by mixing these herbicides. DPX-A7881 controlled wild mustard, and clopyralid controlled wild buckwheat independently of the other herbicide. However, redroot pigweed and common lambsquarters were controlled better with DPX-A7881 plus clopyralid than with either herbicide alone. The herbicides interacted in an additive to synergistic manner on redroot pigweed depending on the rate of each herbicide. DPX-A7881 and clopyralid interacted synergistically at all rates on common lambsquarters. Plant height, date of flowering, seed yield, and quality data all indicated that canola completely tolerated DPX-A7881 and clopyralid applied alone or in combination.

Keywords

clopyralid, 3,6-dichloro-2-pyridinecarboxylic acidDPX-A7881, methyl 2-[(4-ethoxy-6-methylamino-1,3,5-triazin-2-yl)-carbamoylsulphanoyl]benzoatecanola, Brassica napus L. ‘Pivot’common lambsquarters, Chenopodium album L. ♯3 CHEALredroot pigweed, Amaranthus retroflexus L. AMAREwild buckwheat, Polygonum convolvulus L. ♯ POLCOwild mustard, Brassica kaber (DC.) L. C. Wheeler ♯ SINARHerbicide interactioncrop toleranceoil contentoilseed raperapeseedseed sizeseed yield
Type
Research
Information
Weed Technology , Volume 3 , Issue 4 , December 1989 , pp. 690 - 695
Copyright
Copyright © 1989 by the Weed Science Society of America 

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