Abstract: 【Objective】 To reveal the inhibitory effect of ethanol extracting solution of thyme on pathogen of cucumber fusarium wilt. 【Methods】The ethanol extraction method,the use of soxhlet apparatus of thyme （Thymus mongolicmus Ronn） stem and leaf fresh samples,stem and leaf dry samples,flower fresh samples,then diluted extract solution to different concentration,and added to the PDA medium,cucumber blight pathogen cultivation experiment was carried out. At the same time the cucumber fusarium wilt fungus growth situation and the bacteriostatic effects were observed. 【Results】The growth rate of pathogen of cucumber fusarium wilt on the medium of ethanol extracting solution with thyme was decreased. The ethanol extracting solution from all parts of thyme had inhibitory effect on the pathogen of cucumber fusarium wilt,and the bacteriostasis rate was different depending on the location and dilution concentration. After 144 h of culture,the bacteriostasis rate of the ethanol extracting solution which was diluted twice of the fresh sample of thyme stem and leaf,was the highest,reaching 45.51%,and the bacteriostasis effect was enhanced with the increase of the concentration. 【Conclusion】The ethanol extracting solution of thyme has the inhibitory effect on the growth of the pathogen of cucumber fusarium wilt,and has the potential to develop into the bacteriostasis agent of cucumber fusarium wilt.

Key words: Thyme, Ethanol extracting solution, Cucumber fusarium wilt, Bacteriostasis effect