Mycelial growth and exclusion of Heterobasidion parviporum inoculated in branches of 15‐year‐old Picea abies clones |
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| Authors: | G. Swedjemark B. Karlsson |
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| Affiliation: | 1. The Forestry Research Institute of Sweden, Uppsala Science Park, S–751 83 Uppsala, Sweden. E‐mail: gunilla.swedjemark@skogforsk.se;2. The Forestry Research Institute of Sweden, Ekebo, Sval?v, Sweden |
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| Abstract: | Twigs of 22 clones of 15‐year‐old Picea abies grafts were inoculated with Heterobasidion parviporum in July and in September 2003. Fungal growth varied between clones and exclusion of the pathogen varied significantly among clones inoculated in July. The results indicate that twigs exhibit the same infection pattern as cuttings when inoculated with H. parviporum and that exclusion of the pathogen in twigs is a clone‐dependent character that occurs during the vegetation period. |
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