Abstract
Effects of Soil Adsorption on Uptake of Simeconazole by Rice Plants and Sheath Blight Control Effect Mikio TSUDA and Shigehiro KATO The purpose of this study is to investigate the significance of soil adsorption on the uptake of Simeconazole (2-(4-fluorophenyl)-1-(1 H-1, 2, 4-triazol-1-y 1)-3-trimethylsilylpropan-2-ol) by rice plants and the control effect on sheath blight. Correlation analysis of adsorption coefficient (Kd) values and different soil physicochemical parameters revealed that the soil adsorption of simeconazole did not correlate to soil pH, cation exchange capacity, organic carbon or clay mineral content. Simeconazole was detected in rice plants three days after its submerged application, and progressively increased within 6-9 days. However, there was a tendency for the uptake of simeconazole by plants to be delayed in soils of high Kd values. In disease control activity tests, simeconazole showed excellent efficacy against rice sheath blight in all soils tested.
