Biological control activity of Gliocladium virens and Trichoderma spp. against soil-borne plant pathogens

摘要

Gliocladium virens and two Trichoderma spp. were found to be antagonists of the soilborne pathogens Fusarium oxysporum f.sp. lycopersici (Fol) and Rhizoctonia solani in dual-cultures. In tests with tomato plants, all three fungal isolates reduced Fusarium wilt caused by Fol and increased plant fresh weight. An isolate of T. harzianum increased both the number and weight of tomato fruits whereas isolates of T. viride and G. virens increased fruit weight only. G. virens also significantly increased tomato plant fresh weight compared to the untreated control. These fungi therefore have potential as biological control agents.