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Response of Wild Oat (Avena fatua), Flax (Linum usitatissimum), and Rapeseed (Brassica campestris and B. napus) to Diclofop-methyl

Published online by Cambridge University Press:  12 June 2017

P. N. P. Chow  and
D. G. Dorrell
P. N. P. Chow
Affiliation:
Agriculture Canada, Brandon, Manitoba R7A 5Z7 and Morden, Manitoba R0G 1J0, Canada
D. G. Dorrell
Affiliation:
Agriculture Canada, Brandon, Manitoba R7A 5Z7 and Morden, Manitoba R0G 1J0, Canada
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Abstract

Diclofop-methyl {methyl ester of 2-[4-(2,4-dichlorophenoxy)phenoxy] propanoic acid} applied as postemergence treatment at rates of 0.84 to 1.68 kg/ha controlled 65 to 87% of the wild oat (Avena fatua L.) without injuring flax (Linum usitatissimum L.) or rapeseed (Brassica campestris L. and B. napus L.) Yields of both crops were significantly increased because wild oat competition was minimized. Wild oat control was further improved when adjuvants were added with the herbicide at a concentration of 0.5% (v/v) to the spray mixture. Oil content, iodine number, and linolenic acid concentration of flax, and oil content of rapeseed were increased with the application of the herbicide, while the protein content of meal from both crops was unaffected. When flax was grown in the greenhouse under weed-free conditions, the 0.84 and 1.12 kg/ha rates of the herbicide did not affect seed and oil composition, whereas the 1.68 kg/ha rate decreased protein content, and slightly increased oil content, but had no significant effect on iodine number when compared with the untreated check. The change in seed and oil quality of flax appears to be related to a reduction in weed competition by the herbicide.

Keywords

Controladjuvantstoleranceseed-yieldoil-quality
Type
Research Article
Information
Weed Science , Volume 27 , Issue 2 , March 1979 , pp. 212 - 215
Copyright
Copyright © 1979 by the Weed Science Society of America 

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References

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