Herbicidal Action Mechanism of Flucetosulfuron
2006
Kim, D.S. (LG Life Sciences, Ltd., Daejeon, Republic of Korea), E-mail: [email protected] | Hwang, K.H. (LG Life Sciences, Ltd., Daejeon, Republic of Korea) | Lee, J.N. (LG Life Sciences, Ltd., Daejeon, Republic of Korea) | Koo, S.J. (LG Life Sciences, Ltd., Daejeon, Republic of Korea)
This study was conducted to investigate the herbicidal action mechanism of flucetosulfuron. At the whole plant level, the GR∧50 values (the dose rate required for 50% growth inhibition) of flucetosulfuron for Echinochloa crus-galli were 0.6 and 4.6 g ai ha-¹ by soil and foliar application, respectively, while those for rice were 183 and 223 g ai ha-¹, respectively, demonstrating high activity against E. crus-galli with good safety to rice. In the assay by dipping leaf and root of E. crus-galli in flucetosulfuron solution at 0.42 ppm, the LT∧50 values (dipping period required for 50% growth inhibition) of flucetosulfuron were 48.7 and 5.5 hrs for leaf and root, respectively, demonstrating that flucetosulfuron applied to the flooded soil is more readily absorbed via root than leaf.
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