Relative germination rate, promptness index, vigor index of crofton weed (Eupatorium adenophorum Spreng.) from 14 populations were tested under different osmotic potentials (PEG6000) to evaluate their drought resistance using the fussy subordinate function. The results indicated that populations LP, PZH and YJ had relatively higher drought resistance while population SM had lower resistance. The average subordinate values of the former three populations with resistance to drought stress were 0.766, 0.689 an...