TY - JOUR
T1 - Diclofop-resistant Lolium rigidum from northern Greece with cross-resistance to ACCase inhibitors and multiple resistance to chlorsulfuron
AU - Kotoula-Syka, Eleni
AU - Tal, Avi
AU - Rubin, Baruch
PY - 2000
Y1 - 2000
N2 - Repeated use of ACCase- and ALS-inhibiting herbicides in northern Greece has resulted in the evolution of a population of Lolium rigidum resistant to diclofop and chlorsulfuron. The biotype from Athos was highly resistant to diclofop and also exhibited differential cross-resistance to clodinatop, fluazitop, tralkoxydim and sethoxydim. Assay of ACCase activity confirmed that the resistant biotype was tenfold more resistant to diclofop than the susceptible biotype, suggesting that the resistance mechanism could involve an altered target site. The diclofop-resistant biotype has also exhibited multiple resistance to chlorsulfuron and the mechanism for this is unknown. Seed-bioassay was found to be a rapid, cheap and reliable method to identify populations of L rigidum resistant to ACCase inhibitors and chlorsulfuron. Moreover, root elongation in the seed bioassay was more sensitive to ACCase inhibitors and chlorsulfuron than shoot elongation. (C) 2000 Society of Chemical Industry.
AB - Repeated use of ACCase- and ALS-inhibiting herbicides in northern Greece has resulted in the evolution of a population of Lolium rigidum resistant to diclofop and chlorsulfuron. The biotype from Athos was highly resistant to diclofop and also exhibited differential cross-resistance to clodinatop, fluazitop, tralkoxydim and sethoxydim. Assay of ACCase activity confirmed that the resistant biotype was tenfold more resistant to diclofop than the susceptible biotype, suggesting that the resistance mechanism could involve an altered target site. The diclofop-resistant biotype has also exhibited multiple resistance to chlorsulfuron and the mechanism for this is unknown. Seed-bioassay was found to be a rapid, cheap and reliable method to identify populations of L rigidum resistant to ACCase inhibitors and chlorsulfuron. Moreover, root elongation in the seed bioassay was more sensitive to ACCase inhibitors and chlorsulfuron than shoot elongation. (C) 2000 Society of Chemical Industry.
KW - ALS inhibitors
KW - Annual ryegrass
KW - Herbicide resistance
KW - Lolium rigidum
UR - http://www.scopus.com/inward/record.url?scp=0033661604&partnerID=8YFLogxK
U2 - 10.1002/1526-4998(200012)56:12<1054::AID-PS267>3.0.CO;2-M
DO - 10.1002/1526-4998(200012)56:12<1054::AID-PS267>3.0.CO;2-M
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AN - SCOPUS:0033661604
SN - 1526-498X
VL - 56
SP - 1054
EP - 1058
JO - Pest Management Science
JF - Pest Management Science
IS - 12
ER -