Following a screening completed over several species of fungus for establishing the efficiency of the extracts produced from them, against agent causing the downy mildew - Pseudoperonospora cubensis - two species of the fungus were selected - Fusarium graminearum and Fusarium culmorum - in order to employ them and their strains with different virulence in the pathosystem fungi /Cucumis sativus?. The utilized extracts are based on ethanol and obtained from mycelium and culture filtrate. The extract was applied 2 and respectively 7 days before the artificial inoculation, realized on the detached tomato`s leaves and maintained at 17C and air relative humidity of 100%. The evaluation was done 6 days after the inoculation. The results show that for the treatment applied 2 days before inoculation the intensity of the attack was reduced by approx. 60% compared with the control but for the inoculation at 7 days after treatment, the intensity was not diminished.
The effect of ethanolic extract from Fusarium Culmorum and Fusarium Graminearum in the pathosystem Pseudoperonospora cubensis (Berk&Curtis) Rostostev/ Cucumis sativus L.