Abstract
DPX-F5384, methyl 2-[[[[[(4, 6-dimethoxypyrimidin-2-yl) amino] carbonyl] amino] sulfonyl] methyl benzoate was studied for biological activity, selectivity and mobility in paddy soil. At 25g a. i./ha, the compound showed excellent control of annual broadleaf weeds and sedges in pot tests. Perennial weeds such as Eleocharis acicularis, Scirpus juncoides, Sagittaria pygmaea, and Cyperus serotinus were controlled at 50g a. i./ha, however, control of Echinochloa oryzicola was not acceptable even at 200g a. i./ha.
Rice plants were tolerant to DPX-F5384. Slight growth retardation was observed with the treatment at 200g a. i./ha, but rice plants recovered rapidly.
The results of sensitivity in comparison with broadleaf crops indicated that rice is more highly tolerant to DPX-F5384 than Chinese cabbage or spinach.
Mobility of the compound in paddy soil was relatively limited (2cm) and similar to that of butachlor.
