In vitro inhibition of Fusarium solani by Trichoderma harzianum and biofertilizer

Cassava root rot causes significant production losses. Difficulties of management, along with the lack chemical fungicides officially registered by Ministry Agriculture, Livestock and Supply (MAPA), require alternative control methods. This study investigated in vitro antagonistic activity Trichoderma harzianum as well a biological fertilizer MICROGEO® on Fusarium solani. The phytophatogenic strains F. solani, called F1 F2 were isolated from rotted cassava tubers T. harzianum, strain ESALQ 1306, fungicide. Continuous liquid composting bovine ruminal content, water produced fertilizer. Dual culture method was used at bioassay harzianum. Sterilized (St) unsterilized (USt) tested different concentrations (% v/v) diluted media. Colony diameters measured daily order to establish mycelial growth velocity index, inhibition percentage, aside sporulation rate spore germination percentage. solani isolates interrupted after hyphae encounter due occurrence mycoparasitism, but without influence rate. induced no biocontrol, whereas product (concentration 2.5%) inhibited approximately 64% 85% F2, respectively. Moreover, declined increasing concentration. In conclusion, biofertilizer showed