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Characterization of Triazine-Resistant Biotypes of Common Lambsquarters (Chenopodium album), Hairy Fleabane (Conyza bonaeriensis), and Yellow Foxtail (Setaria glauca) Found in Spain

Published online by Cambridge University Press:  12 June 2017

Rafael De Prado ,
Carmen Dominguez  and
Manuel Tena
Rafael De Prado
Affiliation:
Dep. Bioquímica y Biología Molecular, E.T.S. Ingenieros Agrónomos, Univ. Córdoba, Aptdo. 3048, 14080 Córdoba, Spain
Carmen Dominguez
Affiliation:
Dep. Bioquímica y Biología Molecular, E.T.S. Ingenieros Agrónomos, Univ. Córdoba, Aptdo. 3048, 14080 Córdoba, Spain
Manuel Tena
Affiliation:
Dep. Bioquímica y Biología Molecular, E.T.S. Ingenieros Agrónomos, Univ. Córdoba, Aptdo. 3048, 14080 Córdoba, Spain
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Abstract

Triazine-resistant (R) biotypes of common lambsquarters, yellow foxtail, and hairy fleabane were found in the Province of Córdoba (Andalusia, Southern Spain). The former two R biotypes came from atrazine-treated cornfields, whereas the latter came from simazine-treated nontilled olive orchards. The R biotypes of common lambsquarters and yellow foxtail and the R biotype of hairy fleabane survived at doses up to 5 kg ai/ha of soil-applied atrazine or simazine, respectively. Photosynthetic electron transport in R biotypes was unaffected by atrazine and simazine but was inhibited by diuron, as shown by fluorescence induction measurements in whole leaves. In Hill reaction assays, the R biotypes showed high resistance to atrazine and simazine (resistance factors in the range of 350 to 550), medium to high resistance to ametryn, terbumeton, metribuzin, and monolinuron (resistance factors in the range of 80 to 250), slight resistance to diuron and methabenzthiazuron (resistance factors in the range of 1.1 to 15.7), and reverse resistance to swep, ioxynil, and DNOC (resistance factors less than 1). It is concluded that the R biotypes have a chloroplast mode of resistance similar to that previously described for other triazine-resistant weed biotypes.

Keywords

Ametryn, N-ethyl-N′-(1-methylethyl)-6-(methylthio)-1,3,5-triazine-2,4-diamineatrazine, 6-chloro-N-ethyl-N′-(1-methylethyl)-1,3,5-triazine-2,4-diaminediuron, N′-(3,4-dichlorophenyl)-N,N-dimethylureaDNOC, 2-methyl-4,6-dinitrophenolioxynil, 4-hydroxy-3,5-diiodobenzonitrilemethabenzthiazuron, N-2-benzothiazolyl-N,N′-dimethylureametribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-onemonolinuron, N′-(4-chlorophenyl)-N-methoxy-N-methylureasimazine, 6-chloro-N,N′-diethyl-1,3,5-triazine-2,4-diamineswep, methyl(3,4-dichlorophenyl)carbamateterbumeton, N-(1,1-dimethylethyl)-N′-ethyl-6-methoxy-1,3,5-triazine-2,4-diaminecommon lambsquarters, Chenopodium album L. # CHEALcorn, Zea mays L.hairy fleabane, Conyza bonaeriensis (L.) Cronq. # ERIBOolive, Olea europaea L.yellow foxtail, Setaria glauca (L.) Beauv. # SETLUChloroplast resistancefluorescence inductionHill reactionatrazinesimazineCHEALERIBOSETLU

Information

Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 37 , Issue 1 , January 1989 , pp. 1 - 4
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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