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Kochia scoparia Growth Response to Triazine Herbicides

Published online by Cambridge University Press:  12 June 2017

Craig R. Salhoff  and
Alex R. Martin
Craig R. Salhoff
Affiliation:
Lilly Res. Lab., P. O. Box 64079, St. Paul, MN 64079
Alex R. Martin
Affiliation:
Dep. Agron., Univ. Nebraska, Lincoln, NE 68583
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Abstract

Greenhouse-grown kochia [Kochia scoparia (L.) Schrad. # KCHSC] seedlings from populations having either a 13-yr triazine history or no triazine history were sprayed postemergence with 0, 2, or 20 kg/ha atrazine [6-chloro-N-ethyl-N′-[1-methylethyl)-1,3,5-triazine-2,4-diamine]. Fresh weight was reduced 20% in triazine history kochia treated with 20 kg/ha atrazine. Seedlings with no triazine history were killed by 2 kg/ha atrazine. Biotypes resistant to atrazine were also resistant to five other triazine herbicides. Biotypes susceptible to atrazine were susceptible to the other triazines. Atrazine-resistant biotypes were more susceptible to 2,4-D [(2,4-dichlorophenoxy)acetic acid] than atrazine-susceptible biotypes, but atrazine history had no effect on response to diuron [N′-(3,4-dichlorophenyl)-N,N-dimethylurea].

Keywords

Atrazinediuron2,4-Dherbicide resistanceresistant biotypesKCHSC
Type
Weed Biology and Ecology
Information
Weed Science , Volume 34 , Issue 1 , January 1986 , pp. 40 - 42
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

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