Tribenuron methyl

Cereals MEKC UV 0.02-0.04 mg kg- 50mM SDS,25mM sodium phosphate (monobasic), pH 6.15 Metsulfuron-methyl, thifensulfuron-methyl, chlorsulfuron, rimsulfuron, tribenuron-methyl 125... 

CASRN 101200-48-0 molecular formula C15H17N5O6S FW 365.39 ChemicaPPhysical. The pseudo-first-order hydrolysis rate constants of tribenuron-methyl in aqueous buffers solutions at 40 °C were 1.1.38/d at pH 7 and 3.66 x lO /d at pH 10. At pH 4 and 22 and 40 °C, the reaction was too fast to determine the hydrolysis rate constant. (Berger and Wolfe, 1996). 

Product-ion MS-MS mass spectra of sulfonylureas, based on a protonated molecule generated by ESI, were reported by Li et al. [53], For most compounds, only two or three prodnct ions were detected, e.g., m/z 141 and 167 for chlorsulfuron, and m/z 150 and 199 for sulfometuron methyl. The [R,N=C=0+H]" fragment is a common fragment in MS-MS. Negative-ion MS-MS mass spectra of chlorsulfuron, metsnUuron-methyl, thifensulfuron-methyl, and tribenuron-methyl were tabulated [43, 52]... 

Tribenuron-methyl C14H16CIN5O5S 2-[4-Methoxy-6-methyl-1,3,5-triazin-2-yl(methyl)carbamoylsulfamoyl]benzoic acid 395.4 5.0 2.0 1 to 7 n.f. 

Sulfometuron-methyl, Metsulfuron-methyl, Tribenuron-methyl, Efhametsulfuron-methyl (all from E. I. 

Phenoxy acids (2,4-dichlorophenoxy acetic acid, MCPA, and 2,4,5-trichlorophenoxy acetic acid) and similar acid herbicides (benzaton, dicamba, dichlorprop, and mecoprop) sulfonurea herbicides (chlorsulforon, metsulforon methyl, tribenuron methyl, and thifensulfuron methyl) triazine herbicides (methoxy-s-triazines, chloro-s-triazines, alkylthio-s-triazines) phenylurea herbicides (fenuron, monolinuron, and diuron), metabolites of the fungicide thiophanate-methyl (carbenazim and 2-aminobenzimidazole)... 

Four sulfonylurea herbicides (thifensulfuron methyl, metsulfuron methyl, chlor-sulfuron, tribenuron methyl) were extracted from water and soil samples and... 

Many broad-leaved weeds in wheat fields were under control (>90 %) after 90 days by using clacydbs at a rate no more than 360 g ai/ha. 30 % Clacyfos EC showed comparable control to tribenuron methyl as a positive control. It is worth mentioning that clayfos showed faster action than tribenuron methyl. 

Clacyfos EC was tested in wheat field at 990-3,750 mL/ha (300-1,125 g ai/ha) when weeds were at 2-8 leaves stage. 13 % MCPA (aqua) 3,750 mL/ha and 10 % tribenuron methyl WP 150 mL/ha, at the recommended rates, were used as the positive controls. A preponderance of weeds in this wheat field were flixweed tansymustard Descurainia Sophia), shepherd s purse Capsella bursa-pastoris), and chickweed Stellaria media). There were also little wild oats (Avena fatua), cleavers Galium aparine) and others. As shown in Table 8.13, after 50 days, clacyfos exhibited 91 % total control at 450 g ai/ha against weeds in this wheat field. The yield of wheat could rise to 6,495 kg/ha which is increased 19 % comparing to the negative imtreated (5,430 kg/ha). However, the yield of wheat... 

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