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| Content Provider | Springer Nature Link |
|---|---|
| Author | Sone, Koichi Naga, Shin ichiro Hata, Kunihiko |
| Copyright Year | 2010 |
| Abstract | The transmission ratio of the pinewood nematode (PWN), Bursaphelenchus xylophilus, to the emerging adult Japanese pine sawyer (JPS), Monochamus alternatus, in its pupal chamber is a determinant of the number of the nematodes carried by JPS beetles. To investigate the factors affecting the transmission ratio, we counted the number of the nematodes carried by 36 newly emerged JPS beetles and the number remaining in and around their pupal chambers, and then estimated the transmission ratio (the number of nematodes carried by a JPS adult as a percentage of the total number of nematodes aggregating in and around its pupal chamber). The total number of nematodes aggregating in and around a pupal chamber ranged from 0 to 19,041, and the number of nematodes carried by a beetle ranged from 0 to 18,920. The transmission ratio correlated with neither the water content of the wood around the pupal chamber nor the degree of wood discoloration caused by blue-stain fungus. The transmission ratio varied with the abundance of the nematodes aggregating in and around the pupal chamber. In pupal chambers with more than 1,000 nematodes, almost all the nematodes were transmitted to the beetle. However, in pupal chambers with fewer than 1,000 nematodes, the transmission ratio varied greatly, from 0 to 100%. These results suggest that aggregation of many PWNs in the pupal chamber might stimulate transmission of the PWNs to the JPS adult and that this abundance-related transmission might contribute to the large variation in the number of PWNs carried by the JPS beetle. |
| Starting Page | 82 |
| Ending Page | 86 |
| Page Count | 5 |
| File Format | |
| ISSN | 13416979 |
| Journal | Journal of Forest Research |
| Volume Number | 16 |
| Issue Number | 1 |
| e-ISSN | 16107403 |
| Language | English |
| Publisher | Springer Japan |
| Publisher Date | 2010-07-15 |
| Publisher Place | Japan |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Abundance-dependency Japanese pine sawyer Pinewood nematode Pupal chamber Transmission ratio Plant Ecology Plant Sciences Tree Biology Forestry Management Forestry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Forestry |
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