Abstract:

Fusarium oxysporum f.sp. cucumerinum is a soil–borne pathogen and can invade the host plant in all stages of developmental period. In our study, the biological control methods based on the nutritional competence and induced resistance which inhibits the F. oxysporum f. sp. cucumerinum were studied in order to achieve best integration. Fluorescent pseudomonad isolates (161) were screened for their antagonistic activity at both in vivo and in vitro conditions simultaneously, against F. oxysporum f. sp. cucumerinum. At the end of these experiment, 20 of fluorescent pseudomonas isolates, which are chosen, was tested in the terms of siderophore effect. Chosen 20 of fluorescent pseudomonas isolates, it is detected that it’s in vitro activity is generally resistant to siderophpre effect. İn the experiments which is done with this isolates, it is seen that in the assessment with in vivo, the effect changes between 7.69% and 38.4%

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