The spores of T.richoderma fungi (isolates: T. virens TRS 106; T.harzianum TRS 59; T. atroviride TRS 43) were produced on the potato dextrose agar medium (PDA-Merck), on Petri plates. After 7 days of incubation at 25◦C, mycelium with spores from one Petri plate were scratched from the surface of medium and suspended in 50 ml of sterile water and mixed in a blender