Mark:                                                    GB_00003

Author(s):                                            Ligetfalusi Kovács, I.

Title:                                                     Potential biological control of Heterobasidion annosum by antagonistic Rhizobacteria on Scots pine seedlings. Part II.

Source:                                                Erdészeti és Faipari Tudományos Közlemények, Erdészeti és Faipari Egyetem Sopron ; 1994-1995.év. 40-41 évfolyam. p.: 83 – 92,  Egyetemi Jegyzetsokszorosító, Sopron, 1996.

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Keywords: biolgical control, rhizobacterial inoculants, Helerobasidion annosum, germination of Scots pine, seeds, seed germination

SUMMARY

The effect of five selected antagonistic rhizobacteria on the germination and emergence of Scots pine seeds was investigated with and without the presence of H. annosum in sterile agar plates and semi-stenle conditions on sandy soil. Both bacteria and H. annnosum were taken from the root zone of Scots pine trees. The effect of the rhizobacterial treatment on seed germination and emergence has depended on the bacterial isolates and cultivation conditions as well as the presence of the pathogen fungus. There were significant differences among the effects of bacterial treatments in both sterile and semi-sterile experimental conditions. On the basis of germination tests three bacterial isolates were selected to prepare suspension for the survival investigation of pine seedlings. These were: a strain of Bacillus megaterium isolates (B2), the isolate of Psedomonas fluorescens sp. (B4) and a strain of an unidentified species belonging to the Rhizobium genus (B3).