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Identification of Sulfonylurea Herbicide-Resistant Prickly Lettuce (Lactuca serriola)

Published online by Cambridge University Press:  12 June 2017

Carol A. Mallory-Smith ,
Donald C. Thill  and
Michael J. Dial
Carol A. Mallory-Smith
Affiliation:
Dep. Plant, Soil Entomol. Sci., Univ. Idaho, Moscow, ID 83843
Donald C. Thill
Affiliation:
Dep. Plant, Soil Entomol. Sci., Univ. Idaho, Moscow, ID 83843
Michael J. Dial
Affiliation:
Dep. Plant, Soil Entomol. Sci., Univ. Idaho, Moscow, ID 83843
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Abstract

A naturally occurring prickly lettuce biotype resistant to a 5:1 formulated mixture of chlorsulfuron:metsulfuron (DPX-G8311) was identified in a no-till winter wheat field near Lewiston, ID, in April, 1987. Field and greenhouse studies were established to evaluate its resistance to other sulfonylureas, imidazolinones, and herbicides with alternate sites of action. The resistant biotype resisted eight sulfonylurea herbicides; resisted the imidazolinone herbicides, imazapyr and imazethypyr, but not imazaquin; and resisted no other herbicides included in the studies. The resistant biotype was identified in seven of nine fields on the farm where it was discovered.

Keywords

Chlorsulfuron, 2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]benzenesulfonamidemetsulfuron, 2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl]benzoic acidimazapyr, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-pyridinecarboxylic acidimazaquin, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-quinolinecarboxylic acidimazethapyr, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acidprickly lettuce, Lactuca serriola L. ♯3 LACSEwinter wheat, Triticum aestivum L.Cross resistanceimidazolinoneimazapyrimazaquinimazethapyrLACSE
Type
Symposium
Information
Weed Technology , Volume 4 , Issue 1 , March 1990 , pp. 163 - 168
Copyright
Copyright © 1990 Weed Science Society of America 

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References

Literature Cited

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