Full TGIF Record # 76564
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Web URL(s):http://onlinelibrary.wiley.com/doi/10.1046/j.1365-3180.2001.00250.x/epdf
    Last checked: 10/13/2015
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Publication Type:
i
Refereed
Author(s):Bravin, F.; Zanin, G.; Preston, C.
Author Affiliation:Bravin and Zanin: Dipartimento di Agronomia Ambientale e Produzioni Vegetali dell'Universitá di Padova, Agripolis, Italy; Preston: CRC for Weed Management Systems, Department of Applied and Molecular Ecology, Waite Campus, University of Adelaide, Austrailia
Title:Resistance to diclofop-methyl in two Lolium spp. populations from Italy: Studies on the mechanism of resistance
Source:Weed Research. Vol. 41, No. 5, October 2001, p. 461-473.
Publishing Information:Oxford: Blackwell Scientific Publications
# of Pages:13
Keywords:TIC Keywords: Herbicide resistance; Diclofop methyl; Lolium; Fluazifop; Acetyl-CoA carboxylase inhibitors; Aryloxyphenoxypropionic herbicides; Cyclohexanedione herbicides; Toxicity; Herbicides; Metabolism
Geographic Terms:Central Italy
Abstract/Contents:"The mechanisms of herbicide resistance were investigated in two diclofop-methyl-resistant Lolium spp. populations from central Italy, Roma '94 and Tuscania '97. These two populations were compared with two susceptible Italian populations (Vetralla '94, Tarquinia '97) and a resistant and a susceptible population from Australia, SLR31 and VLR1. The activity of acetyl Co-A carboxylase (ACCase) extracted from susceptible (S) or resistant (R) individuals from the Italian populations was inhibited by both aryloxyphenoxypropanoate (diclofop acid and fluazifop acid) and cyclohexanedione (sethoxydim) herbicides. Diclofop-methyl was rapidly de-esterfied to diclofop acid at a similar rate in both R and S populations. In all populations, diclofop acid was subsequently degraded to other metabolites. The rate of degradation of diclofop acid was not significanlty faster in R than in S poplulations; however, diclofop acid was degraded more completely in Roma '94 and Tuscania '97 compared with the S populations. Applications of the mixed-function oxidase inhibitor 1-aminobenzotriazole (ABT) significantly enhanced diclofop-methyl toxicity towards both R populations, but not in S populations. However, enhanced herbicide metabolism does not completely account for the measured resistance level. A mechanism other than an altered ACCase and enhanced herbicide metabolism appears to be responsible for resistance to diclofop-methyl in Roma '94 and Tuscania '97."
Language:English
References:21
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bravin, F., G. Zanin, and C. Preston. 2001. Resistance to diclofop-methyl in two Lolium spp. populations from Italy: Studies on the mechanism of resistance. Weed Res. 41(5):p. 461-473.
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Web URL(s):
http://onlinelibrary.wiley.com/doi/10.1046/j.1365-3180.2001.00250.x/epdf
    Last checked: 10/13/2015
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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MSU catalog number: SB 599 .W4
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