The possibility of control the Scots Pine seedlings damping-off with Trichoderma spp.

摘要

In the laboratory experiment the effectiveness of Trichoderma harzianum and T viride in the control of damping-off of pine (Pinus sylvestris L.) seedlings caused by Cylindrocarpon destructans, Fusarium oxysporum and Rhizoctonia solani was investigated. Trichoderma spp. were used in pine or beech sawdust substrate or in the form of T harzianum powder. There were also sterile pine and beech sawdust used. There were 9 different combinations of the experiment. The test was carried out in the glasshouse, at 20-25 deg./15- 18 deg C during day and night for 4 weeks. Trichoderma harzianum used in the form of water suspension or of powder, as well as in the beech sawdust reduced the damping-off caused by C destructans. The sterile beech sawdust was also effective against C destructans. In the experiment with F oxysporum the protective effect depended on the amount of sawdust used. The reduction of damping-off was possible only when bigger amount of sawdust was used. None reduction of damping-off caused by R. solani could be inducted by Trichoderma spp. used in sawdust or in the form of powder.