Demeton-S-methyl

Metabolites in the degradation of Demeton S-methyl sulfoxide by soil... 

Demeton-S-methyl sulfone (hRf 0-5), dimethoate (h/ f 5-10), demeton-S-metlq (hRf 20-25), triazophos (h/ f 40-45), azinphos-methyl (hRf 40-45), azinphos-ethj (hRf 50-55), malathion (h/ f 60-65), parathion-methyl (hRf 75-80) and parathioo ethyl (h/ f 80-85) yielded yellow to brown chromatogram zones on a light brown bact ground, with thiophosphate insecticides with P = S double bonds appearing as brow zones and those with single P — S bonds as yellow zones. 

Fig. 1 Reflectance scan of a chromatogram track with 100 ng each substance per chromatogram, one 1 = demeton-S-methyl sulfone, 2 = dimethoate, 3 = demeton-S-methyl, 4 = triazophos, 5 = azinphos-methyl, 6 = azinphos-ethyl, 7 = malathion, 8 = parathion-methyl and 9 = para-...

Demeton-S-methyl Birds Acute oral LDjo (mg/kg) 10-50... 

Environmental Health Criteria 197 (1997). Demeton-S-Methyl. Geneva WHO. 

Dehydrocorticosterone 221 Demeton-S-methyl 362 Demeton-S-methylsulfone 362 Deoxynivalenol 89,147,148 Derivatization, aims 56, 57 -, during development 57 -, for clean up 56 -, in situ 56... 

Fig. 15.5 Comparison of gas chromatogram obtained with (i) a phosphorus detector and (ii) an electron capture detector (a) an extract equivalent to IL of Thames water and (b) the same extract fortified with pesticides. Peaks correspond to 5ng of each compound 1, Demeton-S-methyl ...

CH3CH2SCH2CH2SP(OCH3)2 Figure 5-6. Structural formula of demeton-s-methyl. 

Uses Demeton-s-methyl is a pale yellow oil that has a sulfur-like odor. It is a systemic and contact insecticide and acaricide. It kills insects that feed on plants by sucking juices. It is used to control aphids, sawflies, and spider mites in fruits, vegetables, potatoes, cereals, ornamentals, and forestry. Demeton-s-methyl replaces methyl demeton, a mixture of demeton-s-methyl and demeton-o-methyl sold as systox meta. Demeton-s-methyl is more toxic to insects than demeton-o-methyl. It is available as an emulsifiable concentrate.28,40... 

Toxicity The acute oral LD50 of demeton-s-methyl for rats is 37.5 mg/kg, and the acute dermal LD50 for rats is 85 mg/kg. The acute LC50 for rats (4 hours) is 500 mg/m3 of air. Workers repeatedly exposed to demeton-s-methyl showed symptoms of headache, nausea, vomiting, diarrhea, sweating, and dizziness. In... 

Demeton-s-methyl phosphoro organic, phosphoro thioate... 

Demeton-s-methyl sulphon phosphoro organic, phosphoro thioate Desmedipham carbamate Desmetryn heterocyclic nitrogen, triazine Diafenthiuron thiourea... 

Mesurol methiocarb Metacide parathion Metacrate metolcarb Metadelphene diethyl toluamide Metaisosystoxulfon demeton-S-methyl sulphone... 

---