Phytotoxicity of Bensulide and Trifluralin in Several Soils

摘要: Seedlings of 19 plant species were grown in soils con- taining 0 to 1,000 ppm O,O-diisopropyl phosphorodithioate S- ester with N-(2-mercaptoethyl)benzenesulfonamide (bensulide) or 100 a,a,a-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin) determine phytotoxicity. Standard growth curves constructed. The concentration bensulide required reduce the shoots 50% (GR50) ranged from 1 barn- yardgrass (Echinochloa crusgalli (L.) Beauv.) more than carrot (Daucus carota L., var. Long Imperator). Several sensitive a Hidalgo sandy loam (pH 8.1) other including Delfina loamy fine sand 6.0). trifluralin was not markedly affected by soil texture and 0.1 German millet (Setaria italica Imperator carrot. standard have been used quantify herbicidal activities field soils.