Eight title compounds were synthesized by condensation of substituted phenoxyacetyl chlorides and ahydroxy alkyl phosphonates.Their structures were characterized byelemental analysis, IR, ̄1H NMR, ̄(31)P NMR measurements and their herbicidal activities andplant growth regularing activities were tested.Some of them( I_g,I_c,I_d,I_h,and I_i )w...