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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 |
Publication Type:
| 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
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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 |
| MSU catalog number: SB 599 .W4 |
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