Labeling of biocontrol agents ZJY-1 and ZJY-116 gfp gene and its ecological adaptability in cucumber rhizosphere Identification and Biocontrol Effects of Antagonistic Bacterium DS-1 Strain Against Fusarium oxysporum f. sp. cucumerinum Identification and Biocontrol Effects of Antagonistic Bacterium DS-1 Strain Against Fusarium oxysporum f. sp. cucumerinum