Survey of plant-mite fauna in southeast area of the Continent of Asia.

在本项目中，我们试图重新整理东南亚禾本科螨类与日本区系的分类关系。在中国和泰国进行的调查显示，有一个典型的蜘蛛螨类群，主要分布在禾本科，即celarius种群。经过对许多标本的详细检验和rDNA序列的系统发育分析，我们得出了一个重要的结论，即该种群显然是一个独立的属。在此基础上，我们建议恢复柱头孢属。此外，还描述了2个新种，分别为stimaeopsis sahrai n.sp和s.a takahashi n.sp。描述由插图和扫描电子显微照片支持（Saito et al.2004）。另一方面，研究了福建省几种单一栽培竹林中两种叶螨类害虫（corpuzae Aponychus和Schizotetranychus nanjingensis）和一种植物类害虫（Typhlodromus bambusae）的迁徙行为。结果表明，黏性屏障对南京杉对1年生嫩枝和蚁对3年生嫩枝从地面到新叶的流动迁移特别有效，但对植螨的迁移没有显著影响。我们还在泰国发现了另一种与刺孢菌密切相关的菌株。虽然这一类群现在属于裂叶螨属，但我们正在研究确定这一类群的适当分类。为了确定日本与亚洲大陆东南地区的关系，目前正在对其他螨种如中鞭毛螨进行观察。这些研究将在一段时间内完成，并在不久的将来发表。

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.