Reference

Thifensulfuron-methyl; Tolerance actions

Thifensulfuron-methyl; Tolerance actions. (Environmental Protection Agency EPA, USA). Federal Register, 69(212), 63954-63957, 3 Nov 2004 (English) 2004 Superintendent of Documents. CODEN: FEREAC. ISSN: 0097-6326. DOCUMENT TYPE: Journal CA Section: 17 (Food and Feed Chemistry) Section cross-reference(s): 5 EPA is reinstating corn tolerances for the herbicide thifensulfuron-Me. These corn tolerances were previously established but inadvertently removed shortly thereafter. Registrations under the Federal Insecticide, Fungicide, and rodenticide Act (FIFRA) for use of thifensulfuron-Me on corn currently exist and have existed for more than 10 years.Except for chemicals metioned above, 79277-27-3 is also used. .

Degradation of thifensulfuron methyl in soil: Role of microbial carboxyesterase activity

Degradation of thifensulfuron methyl in soil: Role of microbial carboxyesterase activity. Brown, Hugh M.; Joshi, Madan M.; Van, Ailien T.; Carski, Theodore H.; Dulka, Joseph J.; Patrick, M. Craig; Reiser, Robert W.; Livingston, Robert S.; Doughty, James (Stine/Haskell Research Center, E. I. du Pont de Nemours Company, Newark, DE 19714, USA). Journal of Agricultural and Food Chemistry, 45(3), 955-961 (English) 1997 American Chemical Society. CODEN: JAFCAU. ISSN: 0021-8561. DOCUMENT TYPE: Journal CA Section: 5 (Agrochemical Bioregulators) Section cross-reference(s): 19 Thifensulfuron Me degrades rapidly in diverse nonsterile agricultural soils. The initial degrdn. product of thifensulfuron Me in nonsterile soils is its deesterified deriv. 79277-67-1 and 79277-27-3 which are cas registry numbers of chemicals are mentioned., thifensulfuron acid, which is herbicidally inactive. Rapid deesterification of thifensulfuron Me is eliminated by heat sterilization of soil but only moderately reduced by sterilization with ethylene oxide. Deesterification is inhibited in both nonsterile and ethylene oxide-sterilized soils by iodoacetamide and specific organophosphorus insecticides. Several actinomycetes and bacteria were isolated from soils which could readily deesterify thifensulfuron Me in pure culture. Cell-free (sterile) culture filtrates of two actinomycetes also catalyzed the deesterification of this herbicide. The rapid deesterification of thifensulfuron Me results, at least in part, from the activity of microbial extracellular carboxyesterase activity. .