Abstract: Two main rot pathogens were carried by of Hami Melon,Rhizopus stolonifer and Fusarium semitecum.They were capable to produce a series of cell wall-degrading enzymes(CWDE)in medium.The results showed that PG and PME from Rhizopus stolonifer showed a higher activity than that from Fusarium semitecum.But F.semitecum was capable to produce some higher Cellulase activity than R.stolonifer.Pyrocatechol,hydroquinone and Buty-p-nydroxy benaxoate all were capable to not only decrease pathogens to produce PG,PME and Cellulase,but also inhibit these enzymes activities.It was found that the CWDE activity(PG,PME,cellulase)produced by the two pathogens is higher in medium containing 1% pectin than that containing 1% CMC.Pectin was capable to induce the two pathogens to produce great amount of PG and PME,but CMC can not.There is no great difference for pectin and CMC to induce the two pathogens to produce cellulase.

Key words:  , phenolics； cell wall-degrading enzyme； inhibition activity； Hami Melon；