Abstract
Tomato is the most economically important vegetable crop in Florida where produces the most fresh-market tomatoes in the United States. Fusarium wilt, caused by Fusarium oxysporum f. sp. lycopersici (FOL), is an important disease in tomato production in Florida, particularly due to lacking effective chemicals for soil treatment. Biological control is an alternative approach in the management of plant diseases, including those caused by soilborne pathogens. In this study, we evaluated two Trichoderma strains (T. atroviride T11 and T. asperellum T25) on their effects against FOL in vitro and in planta. T. asperellum T25 and its cultural filtrate showed inhibitory effects against mycelial growth of FOL in vitro and significantly reduced disease severity of Fusarium wilt in tomato in the greenhouse when T25 was mixed into soil at seeding. Although the mechanisms for biocontrol are still under investigation, results from this study indicate that T25 has great potential in the management of Fusarium wilt in tomato production.
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