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Control of Cruciferae Weeds in Canola (Brassica napus) with DPX A7881

Published online by Cambridge University Press:  12 June 2017

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

Postemergence control of broadleaf weeds in canola with DPX A7881 was studied under controlled-environment and field conditions. DPX A7881 controlled weeds of the Cruciferae family such as wild mustard, field pennycress, and flixweed, which are not controlled with existing herbicides used for weed control in canola. Weed control was better when DPX A7881 was applied at the two-leaf than at the six-leaf stage of the weeds. At the two-leaf stage, control of flixweed was achieved with 15 g ai/ha of DPX A7881; 20 to 30 g ai/ha was required for control of wild mustard and field pennycress. Control of redroot pigweed required 30 g ai/ha. Common lambsquarters was not controlled in this study with DPX A7881 up to 60 g ai/ha. Control of weeds with DPX A7881 increased canola yields in this study without altering the important quality components: oil content, 1000-kernel weight, and green seed content. DPX A7881 provides a postemergence alternative to existing herbicides for broadleaf weed control in canola.

Keywords

DPX A7881, methyl 2-[(4-ethoxy-6-methylamino-1,3,5-triazin-2-yl) carbamoylsulphanoyl]benzoatecanola, Brassica napus L.common lambsquarters, Chenopodium album L. ♯3 CHEALfield pennycress, Thlaspi arvense L. ♯ THLARflixweed, Descurainia sophia (L.) Webb. ex Prantl DESSOgreen smartweed, Polygonum scabrum Moench. ♯ POLSCredroot pigweed, Amaranthus retroflexus L. AMAREwild mustard, Brassica kaber (DC.) L. C. Wheeler ♯ SINARRapeseedoilseed rapeherbicideseed yieldoil contentseed weight
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 37 , Issue 5 , September 1989 , pp. 706 - 711
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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