2003 Fiscal Year Final Research Report Summary
Survey of plant-mite fauna in southeast area of the Continent of Asia.
| Project/Area Number |
13575021
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
植物保護
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| Research Institution | HOKKAIDO UNIVERSITY |
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Principal Investigator |
SAITO Yutaka Hokkaido Univ., Graduate School of Agriculture, Prof., 大学院・農学研究科, 教授 (20142698)
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| Co-Investigator(Kenkyū-buntansha) |
TAKASU Gen Hokkaido University of Education, Faculty of Education, Assistant Professor, 教育学部, 助教授 (40236203)
OHSAKI Naota Kyoto Univ., Graduate School of Agriculture, Prof., 大学院・農学研究科, 助教授 (70127059)
GOTOH Tetsuo Ibaraki Univ., Faculty of Agriculture, Prof., 農学部, 教授 (60178449)
SAHARA Ken Hokkaido Univ., Graduate School of Agriculture, Assistant Prof., 大学・大学院・農学研究科, 助手 (30241368)
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| Project Period (FY) |
2001 – 2003
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| Keywords | Tetranychidae / Phytoseiidae / rDNA / Molecular Phylogeny / Taxonomy / Species diversity / China / Thailand |
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| Research Abstract |
In this project we have attempted to rearrange the taxonomy of mite species inhabiting Graminidae in southeast Asia in relation to Japanese fauna. Several surveys conducted in China and Thailand revealaled that there is a typical spider mite group which mainly occurs on Graminidae, i.e.celarius species group. After detailed inspection of many specimens and phylogenetic analyses by rDNA sequences, we have reached an important conclusion that this species group apparently form an independent genus. Then we proposed that the genus Stigmaeopsis Banks should be reinstated. Furthermore, 2 new species of Stigmaeopsis sahrai n.sp.and S.takahashi n sp are described Five species previously known as "celarius" species group in Schizotetranychus are then moved to Stigmaeopsis. Descriptions are supported by illustrations and scanning electron micrographs (Saito et al.2004).
On the otehr hand, we studied on the migratory behavior of two tetranychid pest species, Aponychus corpuzae and Schizotetranychus nanjingensis, and one phytoseiid, Typhlodromus bambusae in several monocultural bamboo forests in Fujian Province, China. The results show that while the sticky barrier is particularly effective at disrupting the ambulatory immigration from the ground to new leaves of S.nanjingensis to 1-year-old shoots and of A.corpuzae to 3-year-old shoots, it has no significant effect on the immigration of the phytoseiid mite.
We also found out another group which is very closely related with Stigmoeopsis in Thailand. Although this group is now belonging to the genus Schizotetranychus, we are now studying to determine appropriate taxonomy of this group.
The otehr mite species such as Mesostigmata are now under observation in order to determine the relationship between Japan and southeast reagion of the Continent of Asia. These studies will be completed for a while and published in near future.
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