Results 151 to 160 of about 1,167 (173)
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Mechanism of clomazone resistance in Leptochloa fusca spp. fasicularis to clomazone
Pesticide Biochemistry and Physiology, 2020Bearded sprangletop (Leptochloa fusca spp. fasicularis) is a problematic weed in California rice (Oryza sativa) production. Historically, bearded sprangletop is controlled with clomazone in California rice fields. The continuous use of clomazone and lack of crop rotation in rice fields resulted in resistance to clomazone in several bearded sprangletop.
Kassim Al-Khatib +2 more
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Environmental Fate and Toxicology of Clomazone [PDF]
, 2013 Clomazone, an isoxazolane herbicide, was first registered for use in 1986 for pest grasses and broad leaf weeds. Although the exact mode of action is still unclear, it is well documented that clomazone causes bleaching of foliar structures; the clomazone metabolite 5-ketoclomazone is regarded to cause the bleaching and to be the ultimate plant toxicant.
Ronald S. Tjeerdema, April R. Van Scoy
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The behavior of clomazone in the soil environment
Pest Management Science, 2009AbstractBACKGROUND: Clomazone is a herbicide used to control broadleaf weeds and grasses. Clomazone use in agriculturally important crops and forests for weed control has increased and is a potential water contaminant given its high water solubility (1100 µg mL−1).
Matthew J. Curtis +4 more
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Weed Science, 1995
The effects of formulation on clomazone volatilization and transport through soil were studied. After 22 days of leaching under unsaturated flow in 49-cm long intact soil cores, greater clomazone movement was observed in Plainfield sand than in Cisne silt loam or Drummer silty clay loam soils.
Gerald K. Sims +4 more
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The effects of formulation on clomazone volatilization and transport through soil were studied. After 22 days of leaching under unsaturated flow in 49-cm long intact soil cores, greater clomazone movement was observed in Plainfield sand than in Cisne silt loam or Drummer silty clay loam soils.
Gerald K. Sims +4 more
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Microbial Transformations of Clomazone
Journal of Agricultural and Food Chemistry, 1996Common soil fungi and bacteria were screened for their abilities to biotransform the herbicide clomazone (2-[(2-chlorophenyl)methyl]-4,4-dimethyl-3-isoxazolidinone) into metabolites. Preparative-scale incubations were conducted with Aspergillus niger (UI-X172) and Cunninghamella echinulata (NRRL-3655) to obtain metabolites in sufficient quantities for ...
John P. N. Rosazza +2 more
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Studies of clomazone mode of action
Pesticide Biochemistry and Physiology, 2006Abstract Intact spinach chloroplasts were used to determine if clomazone, 5-OH clomazone, and/or 5-keto clomazone inhibited the chloroplastic isoprenoid pathway. When isopentenyl pyrophosphate was used as a precursor, neither clomazone nor the clomazone metabolites (5-OH clomazone and 5-keto clomazone) inhibited the formation of products separated by
Michael Barrett, Yurdagul Ferhatoglu
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Metabolism of clomazone herbicide in soybean
Journal of Agricultural and Food Chemistry, 1992The metabolism of 2-[(2-chlorophenyl) methyl]-4,4-dimethyl-3-isoxazolidinone (clomazone) was studied in soybean plants grown in the greenhouse using 14C-radiolabeled clomazone at 1.1 and 2.2 kg of ai/ha. Isolation and identification of clomazone metabolites from soybean plants at 30 and 60 days after treatment indicated that the major metabolic ...
R. A. Robinson +4 more
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Clomazone Dissipation in Two Montana Soils
Weed Technology, 1989Clomazone is effective as a chemical fallow herbicide; however, its soil residual properties in the Northern Great Plains are unknown. Clomazone was applied to soil at 0.6, 1.1, and 2.2 kg ai/ha at two locations in Montana in the spring of 1986. Soil samples were taken at each location at monthly intervals for 6 months. Residual levels of the herbicide
William P. Inskeep +2 more
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Clomazone Dissipation in Two Tennessee Soils
Weed Science, 1996Clomazone dissipation in soil was examined in field and laboratory experiments. Field studies suggested a potential for injury to rotational crops such as wheat. Field half-lives were 5 to 29 d (average of 9 field studies was 19 d) for the Etowah clay loam (fine-loamy, siliceous, thermic typic Paleudult) and Lily loam (fine-loamy, siliceous, thermic ...
K. Bruce Kirksey +4 more
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Adsorption of Clomazone on Soils, Sediments, and Clays
Weed Science, 1989Regression analysis of clomazone adsorption on 19 soils and sediments yielded a positive correlation and linear relationship between distribution adsorption constants (Kd) and soil organic carbon content. The agreement of the experimental mean Kocwith Kocvalues predicted from the octanol-water partition coefficient and water solubility of clomazone ...
Fred W. Slife +2 more
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