Fusarium wilt is one of the most serious threats to banana production worldwide.The disease is caused by soil-born fungal pathogen Fusarium oxysporum f.sp.cubense (Foc), especially tropical race 4 (Foc TR4).Crop rotation and intercropping of Chinese leek (Allium tuberosum) with banana had been reported that it could efficiently reduce the disease incidence in-field.In this study, we have investigated the toxic mechanism and bioactive compounds of Chinese leek root exudates (CLREs) to Foc TR4.