By comparing and analyzing the growth curve changes of the pathogen of soft rot disease in Amorphophalms konjac under the stress of different concentrations of glucomannan,the relationship between glucomannan and pathogen of soft rot disease was studied.The results showed that: in the stable growth phase of the pathogen of soft rot disease,the inhibitory effect of glucomannan to the pathogen of soft rot disease gradually increased with the rising of glucomannan concentration,but the difference among differe...