Influence of soil factors on the dissipation of a new pyrimidynyloxybenzoic herbicide ZJ0273.

A novel pyrimidynyloxybenzoic herbicide (ZJ0273) uniformly labeled with (14)C on the benzoate ring was applied to soils under sterile and nonsterile conditions to understand the effect of soil microorganisms and selected properties on its dissipation and transformations to bound resides and (14)CO(2). A significant effect of soil microorganisms was found in an acidic soil, where sterilization significantly prolonged the half-dissipation time (DT(50)) of ZJ0273 from 15.57 to 34.

Plant availability and phytotoxicity of soil bound residues of herbicide ZJ0273, a novel acetolactate synthase potential inhibitor.

The plant availability and phytotoxicity of soil bound residues (BR) of herbicide ZJ0273, a novel acetolactate synthase (ALS) potential inhibitor, to rice (Oryza sativa L.) and corn (Zea mays L.) was investigated in three different soils including a Fluvio-marine yellow loamy soil (S(1)), a Red clayey soil (S(2)), and a Coastal saline soil (S(3)), using (14)C-labeling tracer and bioassay techniques.

Kinetics of extractable residue, bound residue and mineralization of a novel herbicide, ZJ0273, in aerobic soils.

ZJ0273, propyl 4-(2-(4,6-dimethoxypyrimidin-2-yloxy)benzylamino)benzoate, is a broad-spectrum herbicide being marketed for use on rape crops. However, environmental behavior and fate of ZJ0273 remained poorly understood. In this study, we used ZJ0273 labelled with (14)C on the C ring to understand the transformation of ZJ0273 in aerobic soils.

Fate characterization of a novel herbicide ZJ0273 in aerobic soils using multi-position 14C labeling.

ZJ0273, propyl 4-(2-(4,6-dimethoxypyrimidin-2-yloxy)benzylamino)benzoate, is a novel herbicide being developed for use on rape crops. The environmental behavior and fate of ZJ0273, however, are not well understood. In this study, multi-position (14)C-labeled compounds (B-ZJ0273 and C-ZJ0273) were used to investigate the fate of ZJ0273 in aerobic soils, and compare their differences in extractable residues (ER), bound residues (BR), and mineralization.

Absorption, translocation, and residue of 14C-ZJ0273 in oilseed rape.

A study was conducted to investigate the absorption and translocation of a novel herbicide (14)C-ZJ0273 in the seedlings and the residue in the mature plants of oilseed rape. Total absorption of (14)C-ZJ0273 into seedlings and mature plants of oilseed rape reached 39.7% and 34.

Bound 14C-metsulfuron-methyl residue in soils.

Bound residue(BR) of 14C-metsulfuron-methyl (14C-BR) in seven kinds of soil was significantly negative-related to soil pH and positive-related to the clay content during the initial 20 d of incubation, but only was significantly negative-related to soil pH after 30 d incubation. Again, the soil pH was found to be the dominant factor affecting BR formation from 14C-metsulfuron-methyl among the basic properties(soil pH, clay, OM and CEC etc.) of soil.