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Article type: Cover
2001 Volume 52 Issue 2 Pages
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Article type: Cover
2001 Volume 52 Issue 2 Pages
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Article type: Appendix
2001 Volume 52 Issue 2 Pages
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Yuichiro TABARU, Kaori MOCHIZUKI, Yasuhiro WATABE, Tomoya TAKAHASHI
Article type: Article
2001 Volume 52 Issue 2 Pages
81-86
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In a preliminary test, male German cockroach evacuated a mean number of 14 drops of feces and the female 11 drops per day, when they were maintained with water and dried mouse food. The feces were deposited at the circumference of the arena (radius 15cm, height 17cm, and area 706.5(cm)^2) in the case of absence of any harborages. In the harborage test, adult German cockroaches were maintained in the same arena with a harborage made of plywood panels, with water and mouse food. Light regimen was 14L : 10D, and the temperature was maintained at approximately 25℃ throughout the test period. When the arena was divided equally into four sections : water, food, insecticide-free harborage, and blank, 90% of the feces of five cockroaches both male and female was deposited in the harborage section, and the remaining 10% deposited in the other sections during a 2-day period. After treatment with 0.05% permethrin or propoxur on the surface of the harborages, the number of their feces dramatically decreased, and no cockroaches were killed within 24hrs. When harborages were treated with 0.05% micro-encapsulated fenitrothion and diazinon, the percentage of the number of the feces in the harborage section did not decrease markedly, and a majority of the cockroaches was killed. The distribution of German cockroach feces is indicative of the presence of aggregations. The presence of feces may serve as an indicator of the repellent qualities of cockroach control insecticides.
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Kimio HIRABAYASHI, Noritaka NISHIO, Masaru YAMAMOTO
Article type: Article
2001 Volume 52 Issue 2 Pages
87-96
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The fauna and distribution of chironomid midges in Ueda City were investigated based on the collections of adults attracted to automatic vending machines at 108 stations in the summer and at 103 stations in the fall of 1997. A total of 3,371 chironomid midges, 1,346 males and 2,025 females, was collected from the stations in both seasons. All of these chironomid midges were classified into 97 species belonging to four subfamilies, i. e., 61 species of Chironominae, one species of Diamesinae, 29 species of Orthocladiinae and six species of Tanypodinae. The most abundant species was Polypedilum nubifer (Skuze), which was collected at 60 stations, followed by Chironomus kiiensis Tokunaga (53 stations), Cricotopus triannulatus (Macquart) (52 stations) and Cryptochironomus albofasciatus (Staeger) (50 stations) in summer. On the other hand, in fall, the most abundant species was Smittia aterrima (Meigen), which was collected at 75 stations, followed by P. convictum (Walker) (52 stations). The collected chironomid midges reflected the environmental condition of the collection site. Thus, the number of species collected in summer was larger than that in fall, and the respective number of terrestrial species was increased in fall. In addition, the fauna of chironomid midges and their distribution patterns in Ueda City changed during both seasons.
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Noriaki AGUI
Article type: Article
2001 Volume 52 Issue 2 Pages
97-103
Published: June 15, 2001
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A nationwide survey of flies (mainly house flies) carrying enterohemorrhagic Escherichia coli (EHEC) O157 was undertaken in 15 prefectures during late spring-late summer in 1997. EHEC-carrying flies were collected from 53% (8/15) of the prefectures. These positive flies were found from the northern (Hokkaido) to southern prefectures (Okinawa). The flies were collected at 210 sites in 15 prefectures and EHEC-carrying flies were confirmed at 15 (7.1%) sites (cattle farm, 11/140 and slaughter house, 4/19). The average rate of EHEC-carrying flies to the total number of flies collected at the 15 positive-sites was 7.2%. The EHEC-carrying flies were 23/4161 (0.55%) house flies and 3/967 (0.31%) other flies. The serotypes and toxin types of EHEC isolates in 26 EHEC-positive flies were O157 : H7 : VT 2 (16/26), O157 : H7 : VT1+VT2 (8/26), O26 : H11 : VT1 (1/26) and O115 : H10 : VT1 (1/26), respectively.
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Yukiko HIGA, Yoshio TSUDA, Nobuko TUNO, Masahiro TAKAGI
Article type: Article
2001 Volume 52 Issue 2 Pages
105-116
Published: June 15, 2001
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Preliminary field experiments were conducted to examine the exophagy of Aedes albopictus in peridomestic habitat by using three different types of experimental buildings in Nagasaki, Japan and Chiangmai, Thailand. The density of females collected by suction traps enhanced by CO_2 was high inside net-walled buildings and at outdoor sites with vegetation. On the other hand, the densities inside a normal walled building and at outdoor sites without vegetation, the microclimate conditions of both of which were different from the outdoor sites with vegetation, were low. To evaluate the effect of blocking by walls for Ae. albopictus invading to feed, an additional experiment by using a bamboo hut with openings of different sizes in the walls was conducted in Thailand. As the opening in the walls was smaller, the difference in the number of females between inside and outside of the hut became significantly larger. Therefore, the effect of physical blocking by walls was suggested. We proposed the presence of vegetation, the difference in environmental conditions inside buildings from those in vegetation due to blocking, and physical blocking by walls for invasion as ecological factors influencing the exophagy of Ae. albopictus.
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Nobuhiro TAKADA, Masahiro NAKAO, Fubito ISHIGURO, Hiromi FUJITA, Yasuh ...
Article type: Article
2001 Volume 52 Issue 2 Pages
117-123
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Between March and August 1995,the prevalence of Lyme disease Borrelia in ticks and rodents in the Kuju Mountains and Sobo Mountains, the highest mountainous areas in the northern half of Kyushu, and also on the Tsushima Islands in the Korean Strait was surveyed. All 20 isolates obtained consisted of 2 Borrelia garinii (pattern C'-C on RFLP analysis) from Ixodes persulcatus from Kuju, 13 B. japonica from I. ovatus and rodents from Kuju and Sobo, 1 B. turdi from I. turdus and 4 B. tanukii from rodents from Tsushima. All these are the first official records from this region. This evidence of Borrelia is suggestive, considering their dispersal from the eastern China and Korean areas to southwestern Japan, based on biogeographical knowledge.
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Tsunemaru OKADOME
Article type: Article
2001 Volume 52 Issue 2 Pages
125-128
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A new species, Eccoptomera chibaensis sp. nov. and an unrecorded species, Neoleria prominens (Becker) of the family Heleomyzidae, are described from Japan. The male genitalia of both species are illustrated.
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Kimio HIRABAYASHI, Masaru YAMAMOTO, Nobutada NAKAMOTO
Article type: Article
2001 Volume 52 Issue 2 Pages
129-135
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Chironomid fauna in slow sand filter beds were investigated and compared with those at two different water filtration plants; one in southwestern Japan, i. e., the Sakishima Islands, and the other in a plateau area, i. e., Honshu Island. As a result, the midges were found to be dominated by three taxa, Cricotopus, Paratrichocladius rufiventris and Tanytarsus oyamai at two filtration plants in the center of Honshu Island. On the other hand, in the Sakishima Islands, the most abundant species was Polypedilum nubifer, which was also collected on Honshu Island. In addition, we recorded two chironomid species from the Sakishima Islands.
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Article type: Appendix
2001 Volume 52 Issue 2 Pages
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Article type: Appendix
2001 Volume 52 Issue 2 Pages
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Masao Kamiya
Article type: Article
2001 Volume 52 Issue 2 Pages
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T. Mizota
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2001 Volume 52 Issue 2 Pages
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Hitoshi Sasaki
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2001 Volume 52 Issue 2 Pages
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Sumiya Ganzorig
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2001 Volume 52 Issue 2 Pages
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Kayoko Matsuo
Article type: Article
2001 Volume 52 Issue 2 Pages
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Setsuko Momma, Takahiko Tsunoda, Jiro Mizoguchi, Hiromi Fujita
Article type: Article
2001 Volume 52 Issue 2 Pages
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M. Iwasa
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2001 Volume 52 Issue 2 Pages
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Akiko Mikami, Hitoshi Sasaki
Article type: Article
2001 Volume 52 Issue 2 Pages
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Shinichi Kawasaki, Hitoshi Sasaki
Article type: Article
2001 Volume 52 Issue 2 Pages
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K. Takahashi
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2001 Volume 52 Issue 2 Pages
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Megumi Hasegawa
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2001 Volume 52 Issue 2 Pages
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Article type: Appendix
2001 Volume 52 Issue 2 Pages
143-144
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Article type: Appendix
2001 Volume 52 Issue 2 Pages
145-146
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J. AKIYAMA
Article type: Article
2001 Volume 52 Issue 2 Pages
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S Suzuki
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2001 Volume 52 Issue 2 Pages
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Hideo Mizuta
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2001 Volume 52 Issue 2 Pages
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K. Kusui
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2001 Volume 52 Issue 2 Pages
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Akio Kamei, Kaori Ono, Kimio Kosuge, Akihiro Kanayama, Keiko Kosone
Article type: Article
2001 Volume 52 Issue 2 Pages
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Kaori Ono, Akio Kamei, Kimio Kosuge, Akihiro Kanayama, Keiko Kosone, T ...
Article type: Article
2001 Volume 52 Issue 2 Pages
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Kimio Kosuge, Rika Murakami, Yasuo Oohata, Sigeaki Kirigaya, Akio Kame ...
Article type: Article
2001 Volume 52 Issue 2 Pages
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Y. Yoshimura, T. Hashimoto
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2001 Volume 52 Issue 2 Pages
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T. Hashimoto, K. Mizutani, G. Shinjo
Article type: Article
2001 Volume 52 Issue 2 Pages
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K. Fujimoto
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2001 Volume 52 Issue 2 Pages
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A. Moribayashi, C. Shudo, H. Kurahashi
Article type: Article
2001 Volume 52 Issue 2 Pages
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H. Kurahashi, A. H. Kirk Spriggs
Article type: Article
2001 Volume 52 Issue 2 Pages
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Satoshi Shinonaga
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2001 Volume 52 Issue 2 Pages
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T. KURIHARA, H. KURAHASHI, A. SHINOHARA
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2001 Volume 52 Issue 2 Pages
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K. Urabe
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2001 Volume 52 Issue 2 Pages
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T. Ikemoto, K. Takai
Article type: Article
2001 Volume 52 Issue 2 Pages
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M. Ando, K. Hirabayashi
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2001 Volume 52 Issue 2 Pages
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K. Saito, A. Kanayama, M. Takahashi, M. Yoshinari, K. Matsubara
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2001 Volume 52 Issue 2 Pages
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T. HAYASHI, H. Ono, A. Yawata
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2001 Volume 52 Issue 2 Pages
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I. Inoue, S. Ui, A. Fujieda, T. Kitagaki, N. Ito, S. Tani
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2001 Volume 52 Issue 2 Pages
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T. Tanikawa, M. Odaki, H. Tanabe
Article type: Article
2001 Volume 52 Issue 2 Pages
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Yasutada Ito
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2001 Volume 52 Issue 2 Pages
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Megumi Hasegawa
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2001 Volume 52 Issue 2 Pages
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K. Hata, T. Kurihara
Article type: Article
2001 Volume 52 Issue 2 Pages
152-
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Article type: Appendix
2001 Volume 52 Issue 2 Pages
153-154
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