[ Objective ] The paper was to determine the residue behavior and environmental safety of 30% kresoxim-methyl SC applied on cucumber under green- house conditions. [Method] Referring to Test Standard of Pesticide Resi...[ Objective ] The paper was to determine the residue behavior and environmental safety of 30% kresoxim-methyl SC applied on cucumber under green- house conditions. [Method] Referring to Test Standard of Pesticide Residues, the residue dynamics of kresoxim-methyl SC in cucumber was determined by GC. [ Result ] The half lives of kresoxim-methly in cucumber of Yinchuan, Changsha, Harbin were 2.8 - 3.1,2.4 - 3.7, 2.1 - 5.1 d, respectively, and the final resi- due in cucumber after application for 3,5,7 d was less than 0.500 0 mg/kg that was the limited standards of the state. [ Conclusion] Under the proposed cultiva- tion conditions, it is recommended to use the maximum dosage formulation of 270 g. a. i/ha （ preparation 0.09 g/m2 ）, with spraying up to three times and the safe interval of 3 -5 d.展开更多
（E） -α- （ Methoxyimi no ） -2 - [ 1-（aryloxy） methyl ]-benzeneacetates, the analogues of Kresoxim-methyl, were ste- rcoselectively synthesized with the coupling reaction of 2-methylphenyldiazonium chloride and m...（E） -α- （ Methoxyimi no ） -2 - [ 1-（aryloxy） methyl ]-benzeneacetates, the analogues of Kresoxim-methyl, were ste- rcoselectively synthesized with the coupling reaction of 2-methylphenyldiazonium chloride and methyl 2-hydroxyiminoacetate in the presence of CuSO4/Na2SO3 as a key step, and it was first found that the coupling reaction could give the key intermediate material（ E）- and（Z）-methyl 2-（hydroxyimino）-2-o-tolylacetate with a molar ratio of 14： 1. The （E）-configurations of all these compounds were assigned on the basis of their 2D-NOESY spectra of ^1H NMR. The preliminary bioassays indicate that most of the compounds show an activity against a wide variety of fungi.展开更多
文摘[ Objective ] The paper was to determine the residue behavior and environmental safety of 30% kresoxim-methyl SC applied on cucumber under green- house conditions. [Method] Referring to Test Standard of Pesticide Residues, the residue dynamics of kresoxim-methyl SC in cucumber was determined by GC. [ Result ] The half lives of kresoxim-methly in cucumber of Yinchuan, Changsha, Harbin were 2.8 - 3.1,2.4 - 3.7, 2.1 - 5.1 d, respectively, and the final resi- due in cucumber after application for 3,5,7 d was less than 0.500 0 mg/kg that was the limited standards of the state. [ Conclusion] Under the proposed cultiva- tion conditions, it is recommended to use the maximum dosage formulation of 270 g. a. i/ha （ preparation 0.09 g/m2 ）, with spraying up to three times and the safe interval of 3 -5 d.
文摘（E） -α- （ Methoxyimi no ） -2 - [ 1-（aryloxy） methyl ]-benzeneacetates, the analogues of Kresoxim-methyl, were ste- rcoselectively synthesized with the coupling reaction of 2-methylphenyldiazonium chloride and methyl 2-hydroxyiminoacetate in the presence of CuSO4/Na2SO3 as a key step, and it was first found that the coupling reaction could give the key intermediate material（ E）- and（Z）-methyl 2-（hydroxyimino）-2-o-tolylacetate with a molar ratio of 14： 1. The （E）-configurations of all these compounds were assigned on the basis of their 2D-NOESY spectra of ^1H NMR. The preliminary bioassays indicate that most of the compounds show an activity against a wide variety of fungi.
