**6. Conclusion**

Fusarium is a large genus of imperfect fungi and numerous species are important plant pathogens. *Fusarium oxysporum* all strains are saprophytic, based on phenotypic and genetic characterize the strains and showed the diversity. Interactions between pathogenic and non-pathogenic strains result in the control of the disease. Complex fusarium species are the economic importance of their pathogenic/nonpathogenic activity. The development of molecular-based genomic tools to study in relation and its characterization. As 106 *formae speciales* have been clearly described within *F. oxysporum*. The pathogenic activity of *F. oxysporum* on plants of economic interest, many wild plants also infect by new *formae speciales*. Greater diversity in

*F. oxysporum* and within *formae speciales* may be revealed over time by using new plant genotypes resulting from breeding. Fusarium species has a significant role in socio-economic and international trade for food security as ability to destroy crop yields and contaminate plant products. New populations of *Fusarium* pathogens will continue to emerge through micro-evolution and the invention of exotic pathogens. Need the research on the biology of the fungus to determine their role of non-host crops and length of survival of chlamydospores in soil.
