Teflubenzuron is a new benzoylurea insecticide with especially good efficacy in controlling insect pestsresistant to organophosphate, synthetic pyrethroid, and carbamate insecticides.

A LC-MS/MS method was developed for the simultaneously determination of 11 benzoylurea insecticides residues,including forchlorfenuron,diflubenzuron,chlorbenzuron,triflumuron,hexaflumuron,lufenuron,teflubenzuron,fluazuron,flufenoxuron,diafenthiuron,chlorfluazuron,in vegetable samples.

The comparison study shows that when urea and formaldehyde are prefabricated into dihydroxymethyl urea to modify phenol-formaldehyde resin, the usage of urea can be increased, the end point of reaction can be controlled more easily and the bin stability of resin is better in the course of modifying property of phenlol-formaldehyde resin by dihydroxymethyl urea than by urea.

Solvent Effects on Raman Spectroscopy of 1,1,3,3-Tetramethylurea in Organic Solvents

Nine novel benzoyl ureas containing sulfur alkyl-substitude-aryl-ketoxime-o-ethers have been synthezed by reation of sulfur alkyl-substitude-aryl-ketoxime-o-ethers and 2,6-difluoro benzoyl isocyanate.

Aimed to find new pesticide with high activity and low toxicity, nine novel benzoyl ureas containing oxime-ether group were synthesized according to bioisoster principle.