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Wild Oat (Avena fatua) and Avena sterilis Morphological Characteristics and Response to Herbicides

Published online by Cambridge University Press:  12 June 2017

Carol N. Somody ,
John D. Nalewaja  and
Stephen D. Miller
Carol N. Somody
Affiliation:
North Dakota State Univ., Fargo, ND 58105 CIBA-GEIGY, Greensboro, NC
John D. Nalewaja
Affiliation:
North Dakota State Univ., Fargo, ND 58105
Stephen D. Miller
Affiliation:
North Dakota State Univ., Fargo, ND 58105
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Abstract

Wild oat (Avena fatua L. ♯3 AVEFA) and Avena sterilis L. ♯ AVEST accessions from the United States were screened for tolerance to diallate [S-(2,3-dichloroallyl) diisopropylthiocarbamate], triallate [S-(2,3,3-trichloroallyl) diisopropylthiocarbamate], barban (4-chloro-2-butynyl m-chlorocarbanilate), diclofop {2-[4-(2,4-dichlorophenoxy) phenoxy] propanoic acid}, difenzoquat (1,2-dimethyl-3,5-diphenyl-1H-pyrazolium), flamprop [N-benzoyl-N-(3-chloro-4-fluorophenyl)-DL-alanine], and MSMA (monosodium methanearsonate). Some accessions were tolerant to more than one herbicide but none were tolerant to all herbicides. Tolerance to a herbicide was not restricted to certain areas of origin of the accessions, and tolerant accessions occurred even in locations that had not been treated previously with the herbicide. In general, accessions from Southern California and Arizona were shorter, produced more tillers, and required the least number of days to panicle emergence. However, accessions from within individual areas were nearly as variable in these characteristics as the entire 1200 accessions. Tolerance of accessions to flamprop, difenzoquat, MSMA, and diclofop was not due to low leaf surface area, since the tolerant accessions usually had the most leaf surface area. All the accessions tolerant to difenzoquat, MSMA, and flamprop, and three of the four accessions tolerant to diclofop, tillered less than the susceptible accessions.

Keywords

TolerancediallatetriallatebarbandiclofopdifenzoquatflampropMSMAAVEFAAVEST
Type
Weed Biology and Ecology
Information
Weed Science , Volume 32 , Issue 3 , May 1984 , pp. 353 - 359
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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